- (IBAction)leftRotate {
// 1.取得头像按钮
UIButton *head = (UIButton *)[self.view viewWithTag:10];
// 2.向左旋转45°
// 45 180
// 角度是正数:顺时针, 角度是负数:逆时针
// head.transform = CGAffineTransformMakeRotation(-M_PI_4);
head.transform = CGAffineTransformRotate(head.transform, M_PI_4);
}
- (IBAction)up {
// 1.取得头像按钮
UIButton *head = (UIButton *)[self.view viewWithTag:10];
// 2.每次向上移动100的距离
// head.transform = CGAffineTransformMakeTranslation(0, -100);
head.transform = CGAffineTransformTranslate(head.transform, 0, -100);
}
- (IBAction)big {
// 1.取得头像按钮
UIButton *head = (UIButton *)[self.view viewWithTag:10];
// 2.增大
// head.transform = CGAffineTransformMakeScale(1.5, 1.5);
head.transform = CGAffineTransformScale(head.transform, 1.5, 1.5);
}
原文：http://www.cnblogs.com/ZippoatiOS/p/3754993.html