实现点击按钮旋转动画
@interface ViewController () { UIButton *button; } @end @implementation ViewController - (void)viewDidLoad { [super viewDidLoad]; button = [UIButton buttonWithType:UIButtonTypeCustom]; [button setImage:[UIImage imageNamed:@"arrows"] forState:UIControlStateNormal]; button.frame = CGRectMake(0, 0, 60, 60); button.center = self.view.center; [self.view addSubview:button]; [button addTarget:self action:@selector(click:) forControlEvents:UIControlEventTouchUpInside]; } - (void)click:(id)sender { if (button.isSelected) { button.selected = NO; [UIView animateWithDuration:0.3 animations:^{ button.transform = CGAffineTransformMakeRotation(0); }]; } else { button.selected = YES; [UIView animateWithDuration:0.3 animations:^{ button.transform = CGAffineTransformMakeRotation(M_PI_2); }]; } }
就可以实现图一图二的效果。
图一:
图二: