以下成员源于类 QIcon 已过时。 提供它们是为使旧源代码能继续工作。强烈建议不要在新代码中使用它们。
(obsolete)
int
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serialNumber () const |
返回的数字标识内容对于此 QIcon 对象。截然不同的 QIcon objects can have the same serial number if they refer to the same contents (but they don't have to). Also, the serial number of a QIcon object may change during its lifetime.
使用 cacheKey () 代替。
A null icon always has a serial number of 0.
Serial numbers are mostly useful in conjunction with caching.
另请参阅 QPixmap::serialNumber ().
