The QPixmapCache::Key 类可以用于有效访问 QPixmapCache . 更多...
| Key () | |
| ~Key () | |
| bool | isValid () const |
使用 QPixmapCache::insert () to receive an instance of Key generated by the pixmap cache. You can store the key in your own objects for a very efficient one-to-one object-to-pixmap mapping.
构造空的 Key 对象。
销毁 Key。
返回
true
if there is a cached pixmap associated with this key. Otherwise, if pixmap was flushed, the key is no longer valid.
