QML 全局对象

The QML JavaScript host environment implements the following host objects and functions. They are built-in, so you can use them from any JavaScript code loaded in QML, without additional imports:

• The Qt object : A QML object that offers helper methods and properties specific to the QML environment.
• qsTr (), qsTranslate (), qsTrId (), qsTrNoOp (), qsTranslateNoOp (), qsTrIdNoOp () functions: QML functions that let you translate strings and 字符串文字 in the QML environment.
• gc() function: A QML function that manually triggers garbage collection.
• print() function: A QML function that prints output to the console.
• The 控制台对象 : Implements a subset of the FireBug 控制台 API .
• XMLHttpRequest , DOMException: Implements a subset of the W3C XMLHttpRequest 规范 .

注意： You cannot use the globalObject () function to change the global object of a QQmlEngine 。更多信息，见 JavaScript 环境限定 .