Qt Tips

1.中文乱码

#pragma execution_character_set("utf-8")

2.产生随机数

#include <QtGlobal>
#include <QTime>

qsrand(QTime(0,0,0).secsTo(QTime::currentTime())); 
int test =qrand()%10;

 3.类型转换

对QObject类进行类型转换(类似dynamic_cast)：qobject_cast<T>();