//旋转180度
self.testView.transform=CGAffineTransformMakeRotation(M_PI);
//缩放0.5*0.5
self.testView.transform=CGAffineTransformMakeScale(0.5 , 0.5);
//平移100,100
self.testView.transform=CGAffineTransformMakeTranslation(110, 110);
//结合两种操作
CGAffineTransform cgt=CGAffineTransformMakeTranslation(110, 110);
CGAffineTransform cgt1=CGAffineTransformRotate(cgt, M_PI_2);
//清除所有transform操作
self.testView.transform=CGAffineTransformIdentity;
//在原来的基础上继续旋转180
self.testView.transform=CGAffineTransformRotate(self.testView.transform, M_PI_2);