CGAffineTransform

self.tempView.transform = CGAffineTransformIdentity;

// CGAffineTransform 方法时在按钮的上次变形的累加
self.tempView.transform = CGAffineTransformScale(self.tempView.transform, 0.8, 0.8);
self.tempView.transform = CGAffineTransformRotate(self.tempView.transform, M_PI_4);
self.tempView.transform = CGAffineTransformTranslate(self.tempView.transform, dx, dy);

// transform:形变属性，能完成的功能：平移、缩放、旋转 CGAffineTransformMake 方法则是相对于初始位置变化
// 缩放
self.tempView.transform = CGAffineTransformMakeScale(0.5, 0.5);
// 平移
self.tempView.transform = CGAffineTransformMakeTranslation(-100, 100);
// 旋转
self.tempView.transform = CGAffineTransformMakeRotation(-M_PI_4);
    
CGAffineTransform translation = CGAffineTransformMakeTranslation(-100, 100);
CGAffineTransform scaleTranslation = CGAffineTransformScale(translation, 0.5, 0.5);
CGAffineTransform rotateScaleTranslation = CGAffineTransformRotate(scaleTranslation, M_PI_2);
self.tempView.transform = rotateScaleTranslation;