QPainter::begin: A paint device can only be painted by one painter at a time
程序：
paintEvent()
{

tank-> paint();
if(istrue==1)
zidan-> paint();
}

当isture==1的时候会出现错误
QPainter::begin: A paint device can only be painted by one painter at a time

到底怎么了
这是个qt程序

[解决办法]
。。请把问题说得清楚些，不然谁都不知道你出问题在哪里。。