QChar 类提供 16 位 Unicode 字符。 更多...
| 头： | #include <QChar> |
| CMake: |
find_package(Qt6 REQUIRED COMPONENTS Core)
target_link_libraries(mytarget PRIVATE Qt6::Core) |
| qmake: | QT += core |
注意： 此类的所有函数 可重入 .
| enum | Category { Mark_NonSpacing, Mark_SpacingCombining, Mark_Enclosing, Number_DecimalDigit, Number_Letter, …, Symbol_Other } |
| enum | Decomposition { NoDecomposition, Canonical, Circle, Compat, Final, …, Wide } |
| enum | Direction { DirAL, DirAN, DirB, DirBN, DirCS, …, DirWS } |
| enum | JoiningType { Joining_None, Joining_Causing, Joining_Dual, Joining_Right, Joining_Left, Joining_Transparent } |
| enum | Script { Script_Unknown, Script_Inherited, Script_Common, Script_Adlam, Script_Ahom, …, Script_ZanabazarSquare } |
| enum | SpecialCharacter { Null, Tabulation, LineFeed, FormFeed, CarriageReturn, …, LastValidCodePoint } |
| enum | UnicodeVersion { Unicode_1_1, Unicode_2_0, Unicode_2_1_2, Unicode_3_0, Unicode_3_1, …, Unicode_Unassigned } |
| QChar () | |
| QChar (ushort code ) | |
| QChar (uchar cell , uchar row ) | |
| QChar (short code ) | |
| QChar (uint code ) | |
| QChar (int code ) | |
| QChar (QChar::SpecialCharacter ch ) | |
| QChar (QLatin1Char ch ) | |
| QChar (char16_t ch ) | |
| QChar (wchar_t ch ) | |
| QChar (char ch ) | |
| QChar (uchar ch ) | |
| QChar::Category | category () const |
| uchar | cell () const |
| unsigned char | combiningClass () const |
| QString | decomposition () const |
| QChar::Decomposition | decompositionTag () const |
| int | digitValue () const |
| QChar::Direction | direction () const |
| bool | hasMirrored () const |
| bool | isDigit () const |
| bool | isHighSurrogate () const |
| bool | isLetter () const |
| bool | isLetterOrNumber () const |
| bool | isLowSurrogate () const |
| bool | isLower () const |
| bool | isMark () const |
| bool | isNonCharacter () const |
| bool | isNull () const |
| bool | isNumber () const |
| bool | isPrint () const |
| bool | isPunct () const |
| bool | isSpace () const |
| bool | isSurrogate () const |
| bool | isSymbol () const |
| bool | isTitleCase () const |
| bool | isUpper () const |
| QChar::JoiningType | joiningType () const |
| QChar | mirroredChar () const |
| uchar | row () const |
| QChar::Script | script () const |
| QChar | toCaseFolded () const |
| char | toLatin1 () const |
| QChar | toLower () const |
| QChar | toTitleCase () const |
| QChar | toUpper () const |
| char16_t | unicode () const |
| char16_t & | unicode () |
| QChar::UnicodeVersion | unicodeVersion () const |
| QChar::Category | category (char32_t ucs4 ) |
| unsigned char | combiningClass (char32_t ucs4 ) |
| QChar::UnicodeVersion | currentUnicodeVersion () |
| QString | decomposition (char32_t ucs4 ) |
| QChar::Decomposition | decompositionTag (char32_t ucs4 ) |
| int | digitValue (char32_t ucs4 ) |
| QChar::Direction | direction (char32_t ucs4 ) |
| QChar | fromLatin1 (char c ) |
(从 6.0 起)
QChar
|
fromUcs2 (char16_t c ) |
(从 6.0 起)
R
|
fromUcs4 (char32_t c ) |
| bool | hasMirrored (char32_t ucs4 ) |
| char16_t | highSurrogate (char32_t ucs4 ) |
| bool | isDigit (char32_t ucs4 ) |
| bool | isHighSurrogate (char32_t ucs4 ) |
| bool | isLetter (char32_t ucs4 ) |
| bool | isLetterOrNumber (char32_t ucs4 ) |
| bool | isLowSurrogate (char32_t ucs4 ) |
| bool | isLower (char32_t ucs4 ) |
| bool | isMark (char32_t ucs4 ) |
| bool | isNonCharacter (char32_t ucs4 ) |
| bool | isNumber (char32_t ucs4 ) |
| bool | isPrint (char32_t ucs4 ) |
| bool | isPunct (char32_t ucs4 ) |
| bool | isSpace (char32_t ucs4 ) |
| bool | isSurrogate (char32_t ucs4 ) |
| bool | isSymbol (char32_t ucs4 ) |
| bool | isTitleCase (char32_t ucs4 ) |
| bool | isUpper (char32_t ucs4 ) |
| QChar::JoiningType | joiningType (char32_t ucs4 ) |
| char16_t | lowSurrogate (char32_t ucs4 ) |
| char32_t | mirroredChar (char32_t ucs4 ) |
| bool | requiresSurrogates (char32_t ucs4 ) |
| QChar::Script | script (char32_t ucs4 ) |
| char32_t | surrogateToUcs4 (char16_t high , char16_t low ) |
| char32_t | surrogateToUcs4 (QChar high , QChar low ) |
| char32_t | toCaseFolded (char32_t ucs4 ) |
| char32_t | toLower (char32_t ucs4 ) |
| char32_t | toTitleCase (char32_t ucs4 ) |
| char32_t | toUpper (char32_t ucs4 ) |
| QChar::UnicodeVersion | unicodeVersion (char32_t ucs4 ) |
| bool | operator!= (QChar c1 , QChar c2 ) |
| bool | operator< (QChar c1 , QChar c2 ) |
| QDataStream & | operator<< (QDataStream & out , QChar chr ) |
| bool | operator<= (QChar c1 , QChar c2 ) |
| bool | operator== (QChar c1 , QChar c2 ) |
| bool | operator> (QChar c1 , QChar c2 ) |
| bool | operator>= (QChar c1 , QChar c2 ) |
| QDataStream & | operator>> (QDataStream & in , QChar & chr ) |
(从 6.0 起)
|
QT_IMPLICIT_QCHAR_CONSTRUCTION |
在 Qt 中，Unicode 字符是没有任何标记 (或结构) 的 16 位实体。此类表示这种实体。它很轻量，所以可以在任何地方使用。大多数编译器视它像
unsigned short
.
QChar 提供完全互补的测试/分类函数、转换到/来自其它格式、从将合成 Unicode 转换为分解 Unicode、及试着比较和大小写转换，若要求的话。
The classification functions include functions like those in the standard C++ header <cctype> (formerly <ctype.h>), but operating on the full range of Unicode characters, not just for the ASCII range. They all return true if the character is a certain type of character; otherwise they return false. These classification functions are
isNull
() (返回
true
若字符为 \0)，
isPrint
() (true if the character is any sort of printable character, including whitespace),
isPunct
() (any sort of punctation),
isMark
() (Unicode 标记)，
isLetter
() (字母)，
isNumber
() (任意排序的数字字符，不仅仅 0-9)，
isLetterOrNumber
()，和
isDigit
() (decimal digits). All of these are wrappers around
category
() which return the Unicode-defined category of each character. Some of these also calculate the derived properties (for example
isSpace
() 返回
true
if the character is of category Separator_* or an exceptional code point from
Other_Control
类别)。
QChar 还提供 direction (), which indicates the "natural" writing direction of this character. The joiningType () function indicates how the character joins with it's neighbors (needed mostly for Arabic or Syriac) and finally hasMirrored (), which indicates whether the character needs to be mirrored when it is printed in it's "unnatural" writing direction.
合成的 Unicode 字符 (像 ring ) 可以被转换成分解 Unicode (a 之后紧跟 ring above) 通过使用 decomposition ().
In Unicode, comparison is not necessarily possible and case conversion is very difficult at best. Unicode, covering the "entire" world, also includes most of the world's case and sorting problems. operator==() and friends will do comparison based purely on the numeric Unicode value (code point) of the characters, and toUpper () 和 toLower () will do case changes when the character has a well-defined uppercase/lowercase equivalent. For locale-dependent comparisons, use QString::localeAwareCompare ().
转换函数包括 unicode () (到标量)、 toLatin1 () (到标量，但将所有非 Latin-1 字符转换成 0)、 row () (给出 Unicode 行)、 cell () (给出 Unicode 单元格)、 digitValue () (给出任意多数字字符的整数值)、及大量构造函数。
QChar 提供构造函数和铸造运算符，使之易于转换到和转换自传统 8 位
char
。若有定义
QT_NO_CAST_FROM_ASCII
and
QT_NO_CAST_TO_ASCII
，作为解释在
QString
文档编制，将需要明确调用
fromLatin1
()，或使用
QLatin1Char
，以构造 QChar 从 8 位
char
，和将需要调用
toLatin1
() 以获得 8 位值。
从 Qt 6.0 开始，大多数 QChar 构造函数都是
explicit
. This is done to avoid dangerous mistakes when accidentally mixing integral types and strings. You can opt-out (and make these constructors implicit) by defining the macro
QT_IMPLICIT_QCHAR_CONSTRUCTION
.
更多信息见 关于 Unicode 字符数据库 .
另请参阅 Unicode , QString ，和 QLatin1Char .
此枚举映射 Unicode 字符类别。
以下是 Unicode 规范字符：
| 常量 | 值 | 描述 |
|---|---|---|
QChar::Mark_NonSpacing
|
0
|
Unicode 类名 Mn |
QChar::Mark_SpacingCombining
|
1
|
Unicode 类名 Mc |
QChar::Mark_Enclosing
|
2
|
Unicode 类名 Me |
QChar::Number_DecimalDigit
|
3
|
Unicode 类名 Nd |
QChar::Number_Letter
|
4
|
Unicode 类名 Nl |
QChar::Number_Other
|
5
|
Unicode 类名 No |
QChar::Separator_Space
|
6
|
Unicode 类名 Zs |
QChar::Separator_Line
|
7
|
Unicode 类名 Zl |
QChar::Separator_Paragraph
|
8
|
Unicode 类名 Zp |
QChar::Other_Control
|
9
|
Unicode 类名 Cc |
QChar::Other_Format
|
10
|
Unicode 类名 Cf |
QChar::Other_Surrogate
|
11
|
Unicode 类名 Cs |
QChar::Other_PrivateUse
|
12
|
Unicode 类名 Co |
QChar::Other_NotAssigned
|
13
|
Unicode 类名 Cn |
以下是 Unicode 情报类别：
| 常量 | 值 | 描述 |
|---|---|---|
QChar::Letter_Uppercase
|
14
|
Unicode 类名 Lu |
QChar::Letter_Lowercase
|
15
|
Unicode 类名 Ll |
QChar::Letter_Titlecase
|
16
|
Unicode 类名 Lt |
QChar::Letter_Modifier
|
17
|
Unicode 类名 Lm |
QChar::Letter_Other
|
18
|
Unicode 类名 Lo |
QChar::Punctuation_Connector
|
19
|
Unicode 类名 Pc |
QChar::Punctuation_Dash
|
20
|
Unicode 类名 Pd |
QChar::Punctuation_Open
|
21
|
Unicode 类名 Ps |
QChar::Punctuation_Close
|
22
|
Unicode 类名 Pe |
QChar::Punctuation_InitialQuote
|
23
|
Unicode 类名 Pi |
QChar::Punctuation_FinalQuote
|
24
|
Unicode 类名 Pf |
QChar::Punctuation_Other
|
25
|
Unicode 类名 Po |
QChar::Symbol_Math
|
26
|
Unicode 类名 Sm |
QChar::Symbol_Currency
|
27
|
Unicode 类名 Sc |
QChar::Symbol_Modifier
|
28
|
Unicode 类名 Sk |
QChar::Symbol_Other
|
29
|
Unicode 类名 So |
另请参阅 category ().
此枚举类型定义 Unicode 分解属性。见 Unicode 标准 了解值的描述。
| 常量 | 值 |
|---|---|
QChar::NoDecomposition
|
0
|
QChar::Canonical
|
1
|
QChar::Circle
|
8
|
QChar::Compat
|
16
|
QChar::Final
|
6
|
QChar::Font
|
2
|
QChar::Fraction
|
17
|
QChar::Initial
|
4
|
QChar::Isolated
|
7
|
QChar::Medial
|
5
|
QChar::Narrow
|
13
|
QChar::NoBreak
|
3
|
QChar::Small
|
14
|
QChar::Square
|
15
|
QChar::Sub
|
10
|
QChar::Super
|
9
|
QChar::Vertical
|
11
|
QChar::Wide
|
12
|
另请参阅 decomposition ().
此枚举类型定义 Unicode 方向属性。见 Unicode 标准 了解值的描述。
为符合 C/C++ 命名约定，在 Unicode 标准使用的代码前置 Dir。
| 常量 | 值 |
|---|---|
QChar::DirAL
|
13
|
QChar::DirAN
|
5
|
QChar::DirB
|
7
|
QChar::DirBN
|
18
|
QChar::DirCS
|
6
|
QChar::DirEN
|
2
|
QChar::DirES
|
3
|
QChar::DirET
|
4
|
QChar::DirFSI (since Qt 5.3)
|
21
|
QChar::DirL
|
0
|
QChar::DirLRE
|
11
|
QChar::DirLRI (since Qt 5.3)
|
19
|
QChar::DirLRO
|
12
|
QChar::DirNSM
|
17
|
QChar::DirON
|
10
|
QChar::DirPDF
|
16
|
QChar::DirPDI (since Qt 5.3)
|
22
|
QChar::DirR
|
1
|
QChar::DirRLE
|
14
|
QChar::DirRLI (since Qt 5.3)
|
20
|
QChar::DirRLO
|
15
|
QChar::DirS
|
8
|
QChar::DirWS
|
9
|
另请参阅 direction ().
从 5.3 起
此枚举类型定义 Unicode 联接类型属性。见 Unicode 标准 了解值的描述。
为符合 C/C++ 命名约定，在 Unicode 标准使用的代码前置 Joining_。
| 常量 | 值 |
|---|---|
QChar::Joining_None
|
0
|
QChar::Joining_Causing
|
1
|
QChar::Joining_Dual
|
2
|
QChar::Joining_Right
|
3
|
QChar::Joining_Left
|
4
|
QChar::Joining_Transparent
|
5
|
另请参阅 joiningType ().
此枚举类型定义 Unicode 脚本特性值。
Unicode 脚本特性值的有关细节，见 Unicode 标准附录 #24 .
为符合 C/C++ 命名约定，在 Unicode 标准使用的代码前置 Script_。
| 常量 | 值 | 描述 |
|---|---|---|
QChar::Script_Unknown
|
0
|
For unassigned, private-use, noncharacter, and surrogate code points. |
QChar::Script_Inherited
|
1
|
For characters that may be used with multiple scripts and that inherit their script from the preceding characters. These include nonspacing marks, enclosing marks, and zero width joiner/non-joiner characters. |
QChar::Script_Common
|
2
|
For characters that may be used with multiple scripts and that do not inherit their script from the preceding characters. |
QChar::Script_Adlam (since Qt 5.11)
|
132
|
|
QChar::Script_Ahom (since Qt 5.6)
|
126
|
|
QChar::Script_AnatolianHieroglyphs (since Qt 5.6)
|
127
|
|
QChar::Script_Arabic
|
8
|
|
QChar::Script_Armenian
|
6
|
|
QChar::Script_Avestan
|
80
|
|
QChar::Script_Balinese
|
62
|
|
QChar::Script_Bamum
|
84
|
|
QChar::Script_BassaVah (since Qt 5.5)
|
104
|
|
QChar::Script_Batak
|
93
|
|
QChar::Script_Bengali
|
12
|
|
QChar::Script_Bhaiksuki (since Qt 5.11)
|
133
|
|
QChar::Script_Bopomofo
|
36
|
|
QChar::Script_Brahmi
|
94
|
|
QChar::Script_Braille
|
54
|
|
QChar::Script_Buginese
|
55
|
|
QChar::Script_Buhid
|
44
|
|
QChar::Script_CanadianAboriginal
|
29
|
|
QChar::Script_Carian
|
75
|
|
QChar::Script_CaucasianAlbanian (since Qt 5.5)
|
103
|
|
QChar::Script_Chakma
|
96
|
|
QChar::Script_Cham
|
77
|
|
QChar::Script_Cherokee
|
28
|
|
QChar::Script_Chorasmian (since Qt 5.15)
|
153
|
|
QChar::Script_Coptic
|
46
|
|
QChar::Script_Cuneiform
|
63
|
|
QChar::Script_Cypriot
|
53
|
|
QChar::Script_CyproMinoan (since Qt 6.3)
|
157
|
|
QChar::Script_Cyrillic
|
5
|
|
QChar::Script_Deseret
|
41
|
|
QChar::Script_Devanagari
|
11
|
|
QChar::Script_DivesAkuru (since Qt 5.15)
|
154
|
|
QChar::Script_Dogra (since Qt 5.15)
|
142
|
|
QChar::Script_Duployan (since Qt 5.5)
|
105
|
|
QChar::Script_EgyptianHieroglyphs
|
81
|
|
QChar::Script_Elbasan (since Qt 5.5)
|
106
|
|
QChar::Script_Elymaic (since Qt 5.15)
|
149
|
|
QChar::Script_Ethiopic
|
27
|
|
QChar::Script_Georgian
|
25
|
|
QChar::Script_Glagolitic
|
57
|
|
QChar::Script_Gothic
|
40
|
|
QChar::Script_Grantha (since Qt 5.5)
|
107
|
|
QChar::Script_Greek
|
4
|
|
QChar::Script_Gujarati
|
14
|
|
QChar::Script_GunjalaGondi (since Qt 5.15)
|
143
|
|
QChar::Script_Gurmukhi
|
13
|
|
QChar::Script_Han
|
37
|
|
QChar::Script_Hangul
|
26
|
|
QChar::Script_HanifiRohingya (since Qt 5.15)
|
144
|
|
QChar::Script_Hanunoo
|
43
|
|
QChar::Script_Hatran (since Qt 5.6)
|
128
|
|
QChar::Script_Hebrew
|
7
|
|
QChar::Script_Hiragana
|
34
|
|
QChar::Script_ImperialAramaic
|
87
|
|
QChar::Script_InscriptionalPahlavi
|
90
|
|
QChar::Script_InscriptionalParthian
|
89
|
|
QChar::Script_Javanese
|
85
|
|
QChar::Script_Kaithi
|
92
|
|
QChar::Script_Kannada
|
18
|
|
QChar::Script_Katakana
|
35
|
|
QChar::Script_Kawi (since Qt 6.5)
|
162
|
|
QChar::Script_KayahLi
|
72
|
|
QChar::Script_Kharoshthi
|
61
|
|
QChar::Script_KhitanSmallScript (since Qt 5.15)
|
155
|
|
QChar::Script_Khmer
|
32
|
|
QChar::Script_Khojki (since Qt 5.5)
|
109
|
|
QChar::Script_Khudawadi (since Qt 5.5)
|
123
|
|
QChar::Script_Lao
|
22
|
|
QChar::Script_Latin
|
3
|
|
QChar::Script_Lepcha
|
68
|
|
QChar::Script_Limbu
|
47
|
|
QChar::Script_LinearA (since Qt 5.5)
|
110
|
|
QChar::Script_LinearB
|
49
|
|
QChar::Script_Lisu
|
83
|
|
QChar::Script_Lycian
|
74
|
|
QChar::Script_Lydian
|
76
|
|
QChar::Script_Mahajani (since Qt 5.5)
|
111
|
|
QChar::Script_Makasar (since Qt 5.15)
|
145
|
|
QChar::Script_Malayalam
|
19
|
|
QChar::Script_Mandaic
|
95
|
|
QChar::Script_Manichaean (since Qt 5.5)
|
112
|
|
QChar::Script_Marchen (since Qt 5.11)
|
134
|
|
QChar::Script_MasaramGondi (since Qt 5.11)
|
138
|
|
QChar::Script_Medefaidrin (since Qt 5.15)
|
146
|
|
QChar::Script_MeeteiMayek
|
86
|
|
QChar::Script_MendeKikakui (since Qt 5.5)
|
113
|
|
QChar::Script_MeroiticCursive
|
97
|
|
QChar::Script_MeroiticHieroglyphs
|
98
|
|
QChar::Script_Miao
|
99
|
|
QChar::Script_Modi (since Qt 5.5)
|
114
|
|
QChar::Script_Mongolian
|
33
|
|
QChar::Script_Mro (since Qt 5.5)
|
115
|
|
QChar::Script_Multani (since Qt 5.6)
|
129
|
|
QChar::Script_Myanmar
|
24
|
|
QChar::Script_Nabataean (since Qt 5.5)
|
117
|
|
QChar::Script_NagMundari (since Qt 6.3)
|
163
|
|
QChar::Script_Nandinagari (since Qt 5.15)
|
150
|
|
QChar::Script_Newa (since Qt 5.11)
|
135
|
|
QChar::Script_NewTaiLue
|
56
|
|
QChar::Script_Nko
|
66
|
|
QChar::Script_Nushu (since Qt 5.11)
|
139
|
|
QChar::Script_NyiakengPuachueHmong (since Qt 5.15)
|
151
|
|
QChar::Script_Ogham
|
30
|
|
QChar::Script_OlChiki
|
69
|
|
QChar::Script_OldHungarian (since Qt 5.6)
|
130
|
|
QChar::Script_OldItalic
|
39
|
|
QChar::Script_OldNorthArabian (since Qt 5.5)
|
116
|
|
QChar::Script_OldPermic (since Qt 5.5)
|
120
|
|
QChar::Script_OldPersian
|
60
|
|
QChar::Script_OldSogdian (since Qt 5.15)
|
147
|
|
QChar::Script_OldSouthArabian
|
88
|
|
QChar::Script_OldTurkic
|
91
|
|
QChar::Script_OldUyghur (since Qt 6.3)
|
158
|
|
QChar::Script_Oriya
|
15
|
|
QChar::Script_Osage (since Qt 5.11)
|
136
|
|
QChar::Script_Osmanya
|
52
|
|
QChar::Script_PahawhHmong (since Qt 5.5)
|
108
|
|
QChar::Script_Palmyrene (since Qt 5.5)
|
118
|
|
QChar::Script_PauCinHau (since Qt 5.5)
|
119
|
|
QChar::Script_PhagsPa
|
65
|
|
QChar::Script_Phoenician
|
64
|
|
QChar::Script_PsalterPahlavi (since Qt 5.5)
|
121
|
|
QChar::Script_Rejang
|
73
|
|
QChar::Script_Runic
|
31
|
|
QChar::Script_Samaritan
|
82
|
|
QChar::Script_Saurashtra
|
71
|
|
QChar::Script_Sharada
|
100
|
|
QChar::Script_Shavian
|
51
|
|
QChar::Script_Siddham (since Qt 5.5)
|
122
|
|
QChar::Script_SignWriting (since Qt 5.6)
|
131
|
|
QChar::Script_Sinhala
|
20
|
|
QChar::Script_Sogdian (since Qt 5.15)
|
148
|
|
QChar::Script_SoraSompeng
|
101
|
|
QChar::Script_Soyombo (since Qt 5.11)
|
140
|
|
QChar::Script_Sundanese
|
67
|
|
QChar::Script_SylotiNagri
|
59
|
|
QChar::Script_Syriac
|
9
|
|
QChar::Script_Tagalog
|
42
|
|
QChar::Script_Tagbanwa
|
45
|
|
QChar::Script_TaiLe
|
48
|
|
QChar::Script_TaiTham
|
78
|
|
QChar::Script_TaiViet
|
79
|
|
QChar::Script_Takri
|
102
|
|
QChar::Script_Tamil
|
16
|
|
QChar::Script_Tangut (since Qt 5.11)
|
137
|
|
QChar::Script_Tangsa (since Qt 6.3)
|
159
|
|
QChar::Script_Telugu
|
17
|
|
QChar::Script_Thaana
|
10
|
|
QChar::Script_Thai
|
21
|
|
QChar::Script_Tibetan
|
23
|
|
QChar::Script_Tifinagh
|
58
|
|
QChar::Script_Tirhuta (since Qt 5.5)
|
124
|
|
QChar::Script_Toto (since Qt 6.3)
|
160
|
|
QChar::Script_Ugaritic
|
50
|
|
QChar::Script_Vai
|
70
|
|
QChar::Script_Vithkuqi (since Qt 6.3)
|
161
|
|
QChar::Script_Wancho (since Qt 5.15)
|
152
|
|
QChar::Script_WarangCiti (since Qt 5.5)
|
125
|
|
QChar::Script_Yezidi (since Qt 5.15)
|
156
|
|
QChar::Script_Yi
|
38
|
|
QChar::Script_ZanabazarSquare (since Qt 5.11)
|
141
|
另请参阅 script ().
| 常量 | 值 | 描述 |
|---|---|---|
QChar::Null
|
0x0000
|
A QChar 具有此值 isNull (). |
QChar::Tabulation
|
0x0009
|
制表符。 |
QChar::LineFeed
|
0x000a
|
|
QChar::FormFeed
|
0x000c
|
|
QChar::CarriageReturn
|
0x000d
|
|
QChar::Space
|
0x0020
|
|
QChar::Nbsp
|
0x00a0
|
不间断空格。 |
QChar::SoftHyphen
|
0x00ad
|
|
QChar::ReplacementCharacter
|
0xfffd
|
The character shown when a font has no glyph for a certain codepoint. A special question mark character is often used. Codecs use this codepoint when input data cannot be represented in Unicode. |
QChar::ObjectReplacementCharacter
|
0xfffc
|
Used to represent an object such as an image when such objects cannot be presented. |
QChar::ByteOrderMark
|
0xfeff
|
|
QChar::ByteOrderSwapped
|
0xfffe
|
|
QChar::ParagraphSeparator
|
0x2029
|
|
QChar::LineSeparator
|
0x2028
|
|
QChar::VisualTabCharacter (since Qt 6.2)
|
0x2192
|
用于以水平箭头方式表示制表符。 |
QChar::LastValidCodePoint
|
0x10ffff
|
指定哪个版本的 Unicode 标准 引入某个字符。
| 常量 | 值 | 描述 |
|---|---|---|
QChar::Unicode_1_1
|
1
|
版本 1.1 |
QChar::Unicode_2_0
|
2
|
版本 2.0 |
QChar::Unicode_2_1_2
|
3
|
版本 2.1.2 |
QChar::Unicode_3_0
|
4
|
版本 3.0 |
QChar::Unicode_3_1
|
5
|
版本 3.1 |
QChar::Unicode_3_2
|
6
|
版本 3.2 |
QChar::Unicode_4_0
|
7
|
版本 4.0 |
QChar::Unicode_4_1
|
8
|
版本 4.1 |
QChar::Unicode_5_0
|
9
|
版本 5.0 |
QChar::Unicode_5_1
|
10
|
版本 5.1 |
QChar::Unicode_5_2
|
11
|
版本 5.2 |
QChar::Unicode_6_0
|
12
|
版本 6.0 |
QChar::Unicode_6_1
|
13
|
版本 6.1 |
QChar::Unicode_6_2
|
14
|
版本 6.2 |
QChar::Unicode_6_3 (since Qt 5.3)
|
15
|
版本 6.3 |
QChar::Unicode_7_0 (since Qt 5.5)
|
16
|
版本 7.0 |
QChar::Unicode_8_0 (since Qt 5.6)
|
17
|
版本 8.0 |
QChar::Unicode_9_0 (since Qt 5.11)
|
18
|
版本 9.0 |
QChar::Unicode_10_0 (since Qt 5.11)
|
19
|
版本 10.0 |
QChar::Unicode_11_0 (since Qt 5.15)
|
20
|
版本 11.0 |
QChar::Unicode_12_0 (since Qt 5.15)
|
21
|
版本 12.0 |
QChar::Unicode_12_1 (since Qt 5.15)
|
22
|
版本 12.1 |
QChar::Unicode_13_0 (since Qt 5.15)
|
23
|
版本 13.0 |
QChar::Unicode_14_0 (since Qt 6.3)
|
24
|
版本 14.0 |
QChar::Unicode_15_0 (since Qt 6.5)
|
25
|
版本 15.0 |
QChar::Unicode_Unassigned
|
0
|
The value is not assigned to any character in version 8.0 of Unicode. |
另请参阅 unicodeVersion () 和 currentUnicodeVersion ().
[constexpr noexcept]
QChar::
QChar
()
构造 null QChar('\0')。
另请参阅 isNull ().
[constexpr noexcept]
QChar::
QChar
(
ushort
code
)
构造 QChar 为字符具有 Unicode 代码点 code .
[explicit constexpr noexcept]
QChar::
QChar
(
uchar
cell
,
uchar
row
)
构造 QChar 为 Unicode 单元格 cell 按行 row .
[constexpr noexcept]
QChar::
QChar
(
short
code
)
构造 QChar 为字符具有 Unicode 代码点 code .
[explicit constexpr noexcept]
QChar::
QChar
(
uint
code
)
构造 QChar 为字符具有 Unicode 代码点 code .
[explicit constexpr noexcept]
QChar::
QChar
(
int
code
)
构造 QChar 为字符具有 Unicode 代码点 code .
[constexpr noexcept]
QChar::
QChar
(
QChar::SpecialCharacter
ch
)
构造 QChar 为预定义字符值 ch .
[constexpr noexcept]
QChar::
QChar
(
QLatin1Char
ch
)
构造的 QChar 对应 ASCII/Latin-1 字符 ch .
[constexpr noexcept]
QChar::
QChar
(
char16_t
ch
)
构造的 QChar 对应 UTF-16 字符 ch .
[constexpr noexcept]
QChar::
QChar
(
wchar_t
ch
)
构造的 QChar 对应宽字符 ch .
注意： 此构造函数只可用于 Windows。
[constexpr noexcept]
QChar::
QChar
(
char
ch
)
构造的 QChar 对应 ASCII/Latin-1 字符 ch .
注意：
此构造函数不可用当
QT_NO_CAST_FROM_ASCII
有定义。
另请参阅 QT_NO_CAST_FROM_ASCII .
[explicit constexpr noexcept]
QChar::
QChar
(
uchar
ch
)
构造的 QChar 对应 ASCII/Latin-1 字符 ch .
注意：
此构造函数不可用当
QT_NO_CAST_FROM_ASCII
or
QT_RESTRICTED_CAST_FROM_ASCII
有定义。
另请参阅 QT_NO_CAST_FROM_ASCII and QT_RESTRICTED_CAST_FROM_ASCII .
[noexcept]
QChar::Category
QChar::
category
() const
返回字符类别。
[static noexcept]
QChar::Category
QChar::
category
(
char32_t
ucs4
)
这是重载函数。
返回的 UCS-4 编码字符类别指定通过 ucs4 .
注意：
在 Qt 6 之前，此函数接受
uint
自变量。
[constexpr noexcept]
uchar
QChar::
cell
() const
返回 Unicode 字符单元格 (最低有效字节)。
另请参阅 row ().
[noexcept]
unsigned
char
QChar::
combiningClass
() const
Returns the combining class for the character as defined in the Unicode standard. This is mainly useful as a positioning hint for marks attached to a base character.
The Qt text rendering engine uses this information to correctly position non-spacing marks around a base character.
[static noexcept]
unsigned
char
QChar::
combiningClass
(
char32_t
ucs4
)
这是重载函数。
返回 UCS-4 编码字符组合类指定通过 ucs4 ，如 Unicode 标准定义的。
注意：
在 Qt 6 之前，此函数接受
uint
自变量。
[static noexcept]
QChar::UnicodeVersion
QChar::
currentUnicodeVersion
()
返回最近支持的 Unicode 版本。
将字符分解成其组成部分。返回空字符串，若不存在分解。
[static]
QString
QChar::
decomposition
(
char32_t
ucs4
)
这是重载函数。
分解 UCS-4 编码字符指定通过 ucs4 成其组成部分。返回空字符串，若不存在分解。
注意：
在 Qt 6 之前，此函数接受
uint
自变量。
[noexcept]
QChar::Decomposition
QChar::
decompositionTag
() const
返回字符合成定义标签。返回 QChar::NoDecomposition 若不存在分解。
[static noexcept]
QChar::Decomposition
QChar::
decompositionTag
(
char32_t
ucs4
)
这是重载函数。
返回 UCS-4 编码字符合成定义标签指定通过 ucs4 。返回 QChar::NoDecomposition 若不存在分解。
注意：
在 Qt 6 之前，此函数接受
uint
自变量。
[noexcept]
int
QChar::
digitValue
() const
返回数字的数值，或 -1 若字符不是数字。
[static noexcept]
int
QChar::
digitValue
(
char32_t
ucs4
)
这是重载函数。
返回数字的数值指定通过 UCS-4 编码字符 ucs4 ，或 -1 若字符不是数字。
注意：
在 Qt 6 之前，此函数接受
uint
自变量。
[noexcept]
QChar::Direction
QChar::
direction
() const
返回字符方向。
[static noexcept]
QChar::Direction
QChar::
direction
(
char32_t
ucs4
)
这是重载函数。
返回 UCS-4 编码字符方向指定通过 ucs4 .
注意：
在 Qt 6 之前，此函数接受
uint
自变量。
[static constexpr noexcept]
QChar
QChar::
fromLatin1
(
char
c
)
转换 Latin-1 字符 c 到其等价 QChar 。这主要用于非国际化软件。
替代是使用 QLatin1Char .
另请参阅 toLatin1 () 和 unicode ().
[static constexpr noexcept, since 6.0]
QChar
QChar::
fromUcs2
(
char16_t
c
)
构造 QChar 从 UTF-16 字符 c .
该函数在 Qt 6.0 引入。
另请参阅 fromUcs4 ().
[static constexpr noexcept, since 6.0]
R
QChar::
fromUcs4
(
char32_t
c
)
返回匿名结构体
char16_t chars[2]
数组，
若
c
要求代理，
chars[0]
包含高代理和
chars[1]
低代理，且
QStringView
拥有大小 2。否则，
chars[0]
包含
c
and
chars[1]
is
null
，和
QStringView
拥有大小 1。
这允许轻松使用结果：
QString s; s += QChar::fromUcs4(ch);
for (char16_t c16 : QChar::fromUcs4(ch)) use(c16);
该函数在 Qt 6.0 引入。
另请参阅 fromUcs2 () 和 requiresSurrogates ().
[noexcept]
bool
QChar::
hasMirrored
() const
返回
true
当应反转字符时，若文本方向相反；否则返回
false
.
快一点相当于 (ch. mirroredChar () != ch).
另请参阅 mirroredChar ().
[static noexcept]
bool
QChar::
hasMirrored
(
char32_t
ucs4
)
这是重载函数。
返回
true
若 UCS-4 编码字符指定通过
ucs4
应反转，若文本方向相反；否则返回
false
.
快一点相当于 ( QChar::mirroredChar (ucs4) != ucs4).
注意：
在 Qt 6 之前，此函数接受
uint
自变量。
另请参阅 mirroredChar ().
[static constexpr noexcept]
char16_t
QChar::
highSurrogate
(
char32_t
ucs4
)
Returns the high surrogate part of a UCS-4-encoded code point. The returned result is undefined if ucs4 is smaller than 0x10000.
注意：
在 Qt 6 之前，此函数接受
uint
自变量并返回
ushort
.
[constexpr noexcept]
bool
QChar::
isDigit
() const
返回
true
若字符是十进制数字 (
Number_DecimalDigit
)；否则返回
false
.
另请参阅 isNumber ().
[static constexpr noexcept]
bool
QChar::
isDigit
(
char32_t
ucs4
)
这是重载函数。
返回
true
若 UCS-4 编码字符指定通过
ucs4
是十进制数字 (
Number_DecimalDigit
)；否则返回
false
.
注意：
在 Qt 6 之前，此函数接受
uint
自变量。
另请参阅 isNumber ().
[constexpr noexcept]
bool
QChar::
isHighSurrogate
() const
返回
true
若
QChar
是 UTF16 代理的高部分 (例如若其代码点在范围 [0xd800..0xdbff])；否则 false。
[static constexpr noexcept]
bool
QChar::
isHighSurrogate
(
char32_t
ucs4
)
这是重载函数。
返回
true
若 UCS-4 编码字符指定通过
ucs4
是 UTF16 代理的高部分 (例如若其代码点在范围 [0xd800..0xdbff])；否则 false。
注意：
在 Qt 6 之前，此函数接受
uint
自变量。
[constexpr noexcept]
bool
QChar::
isLetter
() const
返回
true
若字符是字母 (Letter_* 类别)；否则返回
false
.
[static constexpr noexcept]
bool
QChar::
isLetter
(
char32_t
ucs4
)
这是重载函数。
返回
true
若 UCS-4 编码字符指定通过
ucs4
是字母 (Letter_* 类别)；否则返回
false
.
注意：
在 Qt 6 之前，此函数接受
uint
自变量。
[constexpr noexcept]
bool
QChar::
isLetterOrNumber
() const
返回
true
若字符是字母或数字 (Letter_* 或 Number_* 类别)；否则返回
false
.
[static constexpr noexcept]
bool
QChar::
isLetterOrNumber
(
char32_t
ucs4
)
这是重载函数。
返回
true
若 UCS-4 编码字符指定通过
ucs4
是字母或数字 (Letter_* 或 Number_* 类别)；否则返回
false
.
注意：
在 Qt 6 之前，此函数接受
uint
自变量。
[constexpr noexcept]
bool
QChar::
isLowSurrogate
() const
返回
true
若
QChar
is the low part of a UTF16 surrogate (for example if its code point is in range [0xdc00..0xdfff]); false otherwise.
[static constexpr noexcept]
bool
QChar::
isLowSurrogate
(
char32_t
ucs4
)
这是重载函数。
返回
true
若 UCS-4 编码字符指定通过
ucs4
is the low part of a UTF16 surrogate (for example if its code point is in range [0xdc00..0xdfff]); false otherwise.
注意：
在 Qt 6 之前，此函数接受
uint
自变量。
[constexpr noexcept]
bool
QChar::
isLower
() const
返回
true
若字符是小写字母，例如
category
() 是
Letter_Lowercase
.
另请参阅 isUpper (), toLower ()，和 toUpper ().
[static constexpr noexcept]
bool
QChar::
isLower
(
char32_t
ucs4
)
这是重载函数。
返回
true
若 UCS-4 编码字符指定通过
ucs4
是小写字母，例如
category
() 是
Letter_Lowercase
.
注意：
在 Qt 6 之前，此函数接受
uint
自变量。
另请参阅 isUpper (), toLower ()，和 toUpper ().
[noexcept]
bool
QChar::
isMark
() const
返回
true
若字符为标记 (Mark_* 类别)；否则返回
false
.
见 QChar::Category 了解一般标记的更多信息。
[static noexcept]
bool
QChar::
isMark
(
char32_t
ucs4
)
这是重载函数。
返回
true
若 UCS-4 编码字符指定通过
ucs4
为标记 (Mark_* 类别)；
false
.
注意：
在 Qt 6 之前，此函数接受
uint
自变量。
[constexpr noexcept]
bool
QChar::
isNonCharacter
() const
返回
true
若
QChar
为非字符；否则 false。
Unicode has a certain number of code points that are classified as "non-characters:" that is, they can be used for internal purposes in applications but cannot be used for text interchange. Those are the last two entries each Unicode Plane ([0xfffe..0xffff], [0x1fffe..0x1ffff], etc.) as well as the entries in range [0xfdd0..0xfdef].
[static constexpr noexcept]
bool
QChar::
isNonCharacter
(
char32_t
ucs4
)
这是重载函数。
返回
true
若 UCS-4 编码字符指定通过
ucs4
为非字符；否则 false。
Unicode has a certain number of code points that are classified as "non-characters:" that is, they can be used for internal purposes in applications but cannot be used for text interchange. Those are the last two entries each Unicode Plane ([0xfffe..0xffff], [0x1fffe..0x1ffff], etc.) as well as the entries in range [0xfdd0..0xfdef].
注意：
在 Qt 6 之前，此函数接受
uint
自变量。
[constexpr noexcept]
bool
QChar::
isNull
() const
返回
true
if the character is the Unicode character 0x0000 ('\0'); otherwise returns
false
.
[constexpr noexcept]
bool
QChar::
isNumber
() const
返回
true
if the character is a number (Number_* categories, not just 0-9); otherwise returns
false
.
另请参阅 isDigit ().
[static constexpr noexcept]
bool
QChar::
isNumber
(
char32_t
ucs4
)
这是重载函数。
返回
true
若 UCS-4 编码字符指定通过
ucs4
is a number (Number_* categories, not just 0-9); otherwise returns
false
.
注意：
在 Qt 6 之前，此函数接受
uint
自变量。
另请参阅 isDigit ().
[noexcept]
bool
QChar::
isPrint
() const
返回
true
if the character is a printable character; otherwise returns
false
. This is any character not of category
Other_
*.
Note that this gives no indication of whether the character is available in a particular font.
[static noexcept]
bool
QChar::
isPrint
(
char32_t
ucs4
)
这是重载函数。
返回
true
若 UCS-4 编码字符指定通过
ucs4
is a printable character; otherwise returns
false
. This is any character not of category
Other_
*.
Note that this gives no indication of whether the character is available in a particular font.
注意：
在 Qt 6 之前，此函数接受
uint
自变量。
[noexcept]
bool
QChar::
isPunct
() const
返回
true
若字符为标点符号标记 (Punctuation_* 类别)；否则返回
false
.
[static noexcept]
bool
QChar::
isPunct
(
char32_t
ucs4
)
这是重载函数。
返回
true
若 UCS-4 编码字符指定通过
ucs4
为标点符号标记 (Punctuation_* 类别)；否则返回
false
.
注意：
在 Qt 6 之前，此函数接受
uint
自变量。
[constexpr noexcept]
bool
QChar::
isSpace
() const
返回
true
if the character is a separator character (Separator_* categories or certain code points from
Other_Control
category); otherwise returns
false
.
[static constexpr noexcept]
bool
QChar::
isSpace
(
char32_t
ucs4
)
这是重载函数。
返回
true
若 UCS-4 编码字符指定通过
ucs4
is a separator character (Separator_* categories or certain code points from
Other_Control
category); otherwise returns
false
.
注意：
在 Qt 6 之前，此函数接受
uint
自变量。
[constexpr noexcept]
bool
QChar::
isSurrogate
() const
返回
true
若
QChar
contains a code point that is in either the high or the low part of the UTF-16 surrogate range (for example if its code point is in range [0xd800..0xdfff]); false otherwise.
[static constexpr noexcept]
bool
QChar::
isSurrogate
(
char32_t
ucs4
)
这是重载函数。
返回
true
若 UCS-4 编码字符指定通过
ucs4
contains a code point that is in either the high or the low part of the UTF-16 surrogate range (for example if its code point is in range [0xd800..0xdfff]); false otherwise.
注意：
在 Qt 6 之前，此函数接受
uint
自变量。
[noexcept]
bool
QChar::
isSymbol
() const
返回
true
若字符为符号 (Symbol_* 类别)；否则返回
false
.
[static noexcept]
bool
QChar::
isSymbol
(
char32_t
ucs4
)
这是重载函数。
返回
true
若 UCS-4 编码字符指定通过
ucs4
为符号 (Symbol_* 类别)；否则返回
false
.
注意：
在 Qt 6 之前，此函数接受
uint
自变量。
[constexpr noexcept]
bool
QChar::
isTitleCase
() const
返回
true
若字符为标题大小写字母，例如
category
() 是
Letter_Titlecase
.
另请参阅 isLower (), toUpper (), toLower ()，和 toTitleCase ().
[static constexpr noexcept]
bool
QChar::
isTitleCase
(
char32_t
ucs4
)
这是重载函数。
返回
true
若 UCS-4 编码字符指定通过
ucs4
为标题大小写字母，例如
category
() 是
Letter_Titlecase
.
注意：
在 Qt 6 之前，此函数接受
uint
自变量。
另请参阅 isLower (), toUpper (), toLower ()，和 toTitleCase ().
[constexpr noexcept]
bool
QChar::
isUpper
() const
返回
true
若字符为大写字母，例如
category
() 是
Letter_Uppercase
.
另请参阅 isLower (), toUpper ()，和 toLower ().
[static constexpr noexcept]
bool
QChar::
isUpper
(
char32_t
ucs4
)
这是重载函数。
返回
true
若 UCS-4 编码字符指定通过
ucs4
是大写字母，例如
category
() 是
Letter_Uppercase
.
注意：
在 Qt 6 之前，此函数接受
uint
自变量。
另请参阅 isLower (), toUpper ()，和 toLower ().
[noexcept]
QChar::JoiningType
QChar::
joiningType
() const
Returns information about the joining type attributes of the character (needed for certain languages such as Arabic or Syriac).
[static noexcept]
QChar::JoiningType
QChar::
joiningType
(
char32_t
ucs4
)
这是重载函数。
Returns information about the joining type attributes of the UCS-4-encoded character specified by ucs4 (needed for certain languages such as Arabic or Syriac).
注意：
在 Qt 6 之前，此函数接受
uint
自变量。
[static constexpr noexcept]
char16_t
QChar::
lowSurrogate
(
char32_t
ucs4
)
Returns the low surrogate part of a UCS-4-encoded code point. The returned result is undefined if ucs4 is smaller than 0x10000.
注意：
在 Qt 6 之前，此函数接受
uint
自变量并返回
ushort
.
[noexcept]
QChar
QChar::
mirroredChar
() const
Returns the mirrored character if this character is a mirrored character; otherwise returns the character itself.
另请参阅 hasMirrored ().
[static noexcept]
char32_t
QChar::
mirroredChar
(
char32_t
ucs4
)
这是重载函数。
Returns the mirrored character if the UCS-4-encoded character specified by ucs4 is a mirrored character; otherwise returns the character itself.
注意：
在 Qt 6 之前，此函数接受
uint
自变量并返回
uint
.
另请参阅 hasMirrored ().
[static constexpr noexcept]
bool
QChar::
requiresSurrogates
(
char32_t
ucs4
)
返回
true
若 UCS-4 编码字符指定通过
ucs4
can be split into the high and low parts of a UTF16 surrogate (for example if its code point is greater than or equals to 0x10000); false otherwise.
注意：
在 Qt 6 之前，此函数接受
uint
自变量。
[constexpr noexcept]
uchar
QChar::
row
() const
Returns the row (most significant byte) of the Unicode character.
另请参阅 cell ().
[noexcept]
QChar::Script
QChar::
script
() const
返回用于此字符的 Unicode 脚本特性值。
[static noexcept]
QChar::Script
QChar::
script
(
char32_t
ucs4
)
这是重载函数。
Returns the Unicode script property value for the character specified in its UCS-4-encoded form as ucs4 .
注意：
在 Qt 6 之前，此函数接受
uint
自变量。
[static constexpr noexcept]
char32_t
QChar::
surrogateToUcs4
(
char16_t
high
,
char16_t
low
)
转换 UTF16 代理对采用给定 high and low 值，到其 UCS-4 编码代码点。
注意：
在 Qt 6 之前，此函数接受
ushort
自变量并返回
uint
.
[static constexpr noexcept]
char32_t
QChar::
surrogateToUcs4
(
QChar
high
,
QChar
low
)
这是重载函数。
转换 UTF16 代理对 ( high , low ) 到其 UCS-4 编码代码点。
注意：
在 Qt 6 之前，此函数返回
uint
.
[noexcept]
QChar
QChar::
toCaseFolded
() const
Returns the case folded equivalent of the character. For most Unicode characters this is the same as toLower ().
[static noexcept]
char32_t
QChar::
toCaseFolded
(
char32_t
ucs4
)
这是重载函数。
Returns the case folded equivalent of the UCS-4-encoded character specified by ucs4 . For most Unicode characters this is the same as toLower ().
注意：
在 Qt 6 之前，此函数接受
uint
自变量并返回
uint
.
[constexpr noexcept]
char
QChar::
toLatin1
() const
返回的 Latin-1 字符相当于 QChar ，或 0。这主要用于非国际化软件。
注意： It is not possible to distinguish a non-Latin-1 character from a Latin-1 0 (NUL) character. Prefer to use unicode (), which does not have this ambiguity.
另请参阅 unicode ().
[noexcept]
QChar
QChar::
toLower
() const
Returns the lowercase equivalent if the character is uppercase or titlecase; otherwise returns the character itself.
[static noexcept]
char32_t
QChar::
toLower
(
char32_t
ucs4
)
这是重载函数。
Returns the lowercase equivalent of the UCS-4-encoded character specified by ucs4 if the character is uppercase or titlecase; otherwise returns the character itself.
注意：
在 Qt 6 之前，此函数接受
uint
自变量并返回
uint
.
[noexcept]
QChar
QChar::
toTitleCase
() const
Returns the title case equivalent if the character is lowercase or uppercase; otherwise returns the character itself.
[static noexcept]
char32_t
QChar::
toTitleCase
(
char32_t
ucs4
)
这是重载函数。
Returns the title case equivalent of the UCS-4-encoded character specified by ucs4 if the character is lowercase or uppercase; otherwise returns the character itself.
注意：
在 Qt 6 之前，此函数接受
uint
自变量并返回
uint
.
[noexcept]
QChar
QChar::
toUpper
() const
Returns the uppercase equivalent if the character is lowercase or titlecase; otherwise returns the character itself.
[static noexcept]
char32_t
QChar::
toUpper
(
char32_t
ucs4
)
这是重载函数。
返回 UCS-4 编码字符的大写等价，指定通过 ucs4 若字符为小写 (或标题大小写)；否则，返回字符自身。
注意：
在 Qt 6 之前，此函数接受
uint
自变量并返回
uint
.
[constexpr noexcept]
char16_t
QChar::
unicode
() const
返回数值 Unicode 值对于 QChar .
[constexpr noexcept]
char16_t
&QChar::
unicode
()
返回数值 Unicode 值的引用对于 QChar .
[noexcept]
QChar::UnicodeVersion
QChar::
unicodeVersion
() const
返回引入此字符的 Unicode 版本。
[static noexcept]
QChar::UnicodeVersion
QChar::
unicodeVersion
(
char32_t
ucs4
)
这是重载函数。
返回引入字符的 Unicode 版本, UCS-4 编码形式的指定为 ucs4 .
注意：
在 Qt 6 之前，此函数接受
uint
自变量。
[constexpr noexcept]
bool
operator!=
(
QChar
c1
,
QChar
c2
)
返回
true
if
c1
and
c2
不是相同 Unicode 字符；否则返回
false
.
[constexpr noexcept]
bool
operator<
(
QChar
c1
,
QChar
c2
)
返回
true
若数值 Unicode 值对于
c1
小于
c2
；否则返回
false
.
写入字符 chr 到流 out .
另请参阅 序列化 Qt 数据类型 .
[constexpr noexcept]
bool
operator<=
(
QChar
c1
,
QChar
c2
)
返回
true
若数值 Unicode 值对于
c1
<=
c2
；否则返回
false
.
[constexpr noexcept]
bool
operator==
(
QChar
c1
,
QChar
c2
)
返回
true
if
c1
and
c2
是相同 Unicode 字符；否则返回
false
.
[constexpr noexcept]
bool
operator>
(
QChar
c1
,
QChar
c2
)
返回
true
若数值 Unicode 值对于
c1
大于
c2
；否则返回
false
.
[constexpr noexcept]
bool
operator>=
(
QChar
c1
,
QChar
c2
)
返回
true
若数值 Unicode 值对于
c1
>=
c2
；否则返回
false
.
读取字符从流 in 到字符 chr .
另请参阅 序列化 Qt 数据类型 .
[since 6.0]
QT_IMPLICIT_QCHAR_CONSTRUCTION
定义此宏使某些 QChar 构造函数隐式而不是明确。这样做是为实施安全转换：
QString str = getString();
if (str == 123) {
// Oops, meant str == "123". By default does not compile,
// *unless* this macro is defined, in which case, it's interpreted
// as `if (str == QChar(123))`, that is, `if (str == '{')`.
// Likely, not what we meant.
}
This macro is provided to keep existing code working; it is recommended to instead use explicit conversions and/or QLatin1Char 。例如：
QChar c1 = 'x'; // OK, unless QT_NO_CAST_FROM_ASCII is defined QChar c2 = u'x'; // always OK, recommended QChar c3 = QLatin1Char('x'); // always OK, recommended // from int to 1 UTF-16 code unit: must guarantee that the input is <= 0xFFFF QChar c4 = 120; // compile error, unless QT_IMPLICIT_QCHAR_CONSTRUCTION is defined QChar c5(120); // OK (direct initialization) auto c6 = QChar(120); // ditto // from int/char32_t to 1/2 UTF-16 code units: // 𝄞 'MUSICAL SYMBOL G CLEF' (U+1D11E) auto c7 = QChar(0x1D11E); // compiles, but undefined behavior at runtime auto c8 = QChar::fromUcs4(0x1D11E); // always OK auto c9 = QChar::fromUcs4(U'\U0001D11E'); // always OK // => use c8/c9 as QStringView objects
该宏在 Qt 6.0 引入。
另请参阅 QLatin1Char , QChar::fromUcs4 ，和 QT_NO_CAST_FROM_ASCII .