Qt的文档说明如下:
Thanks to implicit sharing,it is very inexpensive for a function to return a container per value. The Qt API contains dozens of functions that return a QList or QStringList per value (e.g.,QSplitter::sizes()). If you want to iterate over these using an STL iterator,you should always take a copy of the container and iterate over the copy. For example:
// RIGHT const QList<int> sizes = splitter->sizes(); QList<int>::const_iterator i; for (i = sizes.begin(); i != sizes.end(); ++i) ... // WRONG QList<int>::const_iterator i; for (i = splitter->sizes().begin(); i != splitter->sizes().end(); ++i) ...
解决方法
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