qsrand(QTime::currentTime().msec()); timer->start(qrand()%5000+1000); 这两句不太明白什么意思

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qsrand(QTime::currentTime().msec()); timer->start(qrand()%5000+1000); 这两句不太明白什么意思
qsrand(QTime::currentTime().msec()); timer->start(qrand()%5000+1000); 这两句不太明白什么意思

qsrand(QTime::currentTime().msec()); timer->start(qrand()%5000+1000); 这两句不太明白什么意思
qsrand(QTime::currentTime().msec());
是取时间作为产生随机数的种子.
qrand()%5000+1000是产生一个在 1000-6000间的数,
timer->start是根据上述产生的数值来启动定时器.
这两句是为了让背景变红的时间不固定.

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