问题
Python strings have a function split() that can take a maxsplit argument (from Python docs):
If maxsplit is given, at most maxsplit splits are done (thus, the list will have at most maxsplit+1 elements). If maxsplit is not specified or -1, then there is no limit on the number of splits (all possible splits are made).
Can QStrings do this? I looked at the docs and there's no split() overload that takes an integer equivalent to maxsplit as argument.
回答1:
It doesn't seem like it, though it seems to be trivial to implement -
QString str("How are all of you doing");
QStringList list = str.split(' ').mid(0, maxSplit);
QString remainingStr = str.section(' ', maxSplit);
list << remainingStr;
Or if you want to be more performant, you can just copy the code from QString::split, and add the extra feature. The code is there at qtbase/src/corelib/tools/qstring.cpp. You just need to add && list.size() <= maxSplit in the while loop.
来源：https://stackoverflow.com/questions/18343253/qt-qstring-maxsplit-argument