编写代码如下
QPainter paint( this );
paint.drawLine(10,0,10,200);
paint.translate(100.0,100.0);
paint.drawLine(-90,-80,-90,-70);
paint.translate(100.0,100.0);
paint.rotate (60.0);
paint.scale( 0.5, 0.5 );
编译的时候出现提示:
error: ‘class QPainter’ has no member named ‘rotate’
make: *** [.obj/release-shared/template.o] Error 1
但是查看qt的头文件qpainter.h,里面却是包含函数 rotate
为什么这里编译会出错呢。应该怎么修改呢。