ios开发transform属性
"ViewController.h" @interface ViewController () @property (weak, nonatomic) IBOutlet UIImageView *imageV; @end @implementation ViewController - (void)viewDidLoad { [super viewDidLoad]; // Do any additional setup after loading the view, typically from a nib. } - (IBAction)moveUp:(id)sender { //平移 [UIView animateWithDuration:0.5 animations:^{ //使用Make,它是相对于*原始的位置做的形变.不累加形变,且多次点击只形变一次 //self.imageV.transform = CGAffineTransformMakeTranslation(0, -100); //相对于上一次做形变.初始值self.imageV.transform为0,多次点击,会自动在上一次形变的基础上做平移 self.imageV.transform = CGAffineTransformTranslate(self.imageV.transform, 0, -100); }]; } - (IBAction)moveDown:(id)sender { //平移 [UIView animateWithDuration:0.5 animations:^{ //使用Make,它是相对于*原始的位置做的形变. //self.imageV.transform = CGAffineTransformMakeTranslation(0, -100); //相对于上一次做形变. self.imageV.transform = CGAffineTransformTranslate(self.imageV.transform, 0, 100); }]; } - (IBAction)rotation:(id)sender { [UIView animateWithDuration:0.5 animations:^{ //旋转(旋转的度数, 是一个弧度),M_PI_4,_下划线表示一个除号/ //self.imageV.transform = CGAffineTransformMakeRotation(M_PI_4); self.imageV.transform = CGAffineTransformRotate(self.imageV.transform, M_PI_4); }]; } - (IBAction)scale:(id)sender { [UIView animateWithDuration:0.5 animations:^{ //缩放 //self.imageV.transform = CGAffineTransformMakeScale(0.5, 0.5); self.imageV.transform = CGAffineTransformScale(self.imageV.transform, 0.8, 0.8); }]; } /** * 总结: 1:平移:transform是结构体,定义一个transform:CGAffineTransform form //使用Make,它是相对于*原始的位置做的形变.不累加形变,且多次点击只形变一次 //self.imageV.transform = CGAffineTransformMakeTranslation(0, -100); //相对于上一次做形变.初始值self.imageV.transform为0,多次点击,会自动在上一次形变的基础上做平移 self.imageV.transform = CGAffineTransformTranslate(self.imageV.transform, 0, -100); 2:旋转: //旋转(旋转的度数, 是一个弧度),M_PI_4,_下划线表示一个除号/ //self.imageV.transform = CGAffineTransformMakeRotation(M_PI_4); self.imageV.transform = CGAffineTransformRotate(self.imageV.transform, M_PI_4); 3:缩放: //缩放 //self.imageV.transform = CGAffineTransformMakeScale(0.5, 0.5); self.imageV.transform = CGAffineTransformScale(self.imageV.transform, 0.8, 0.8); 4:清空形变属性: CGAffineTransform form = CGAffineTransformIdentity; self.imageV.transform = form; 5:1:在实际开发中,使用场景:1:当涉及一些frame的改变或是形变的时候可以用transform来取代frame 2:一般在实际开发中都是平移,旋转缩放混合使用。 */ @end