UIView 的旋轉和縮放

 label.transform = CGAffineTransformMakeRotation(90 *M_PI / 180.0);

//順時針旋轉 90度

 label.transform = CGAffineTransformMakeRotation(180 *M_PI / 180.0);

//順時針 旋轉180度

 label.transform = CGAffineTransformMakeRotation(270 *M_PI / 180.0);

//順時針旋轉270度

CGAffineTransform transform = label.transform;

transform = CGAffineTransformScale(transform, 2,0.5);//前面的2表示橫向放大2倍，后邊的0.5表示縱向縮小一半  

label.transform = transform;