长了脑子是要用的。打开QtCreator的帮助页面，找到Qt Reference Documentation ---》Classes--》QLineEdit Class Reference看到QLineEdit的帮助文档，SignalsvoidcursorPositionChanged ( int old, int new )voideditingFinished ()voidreturnPressed ()voidselectionChanged ()voidtextChanged ( const QString & text )voidtextEdited ( const QString & text ...
