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我有一个由以下代码创建的 UIButton
button = [UIButton buttonWithType:UIButtonTypeCustom];
[button setImage:[UIImage imageNamed:@"refresh_icon.png"] forState:UIControlStateNormal];
[button setImage:[UIImage imageNamed:@"reload_selected.png"] forState:UIControlStateSelected];
[button addTarget:self action:@selector(buttonAction:)forControlEvents:UIControlEventTouchUpInside];
[button setFrame:CGRectMake(0, 0, 20 , 20)];
在这里，当它被点击时，选择器 buttonAction 被调用，我通过这样的 360 度旋转动画按钮
- (void) buttonAction : (id) sender {
NSLog(@"Reload Button Clicked");
[self runSpinAnimationOnView:self.button duration:1.0 rotations:1.0 repeat:0];
}
- (void) runSpinAnimationOnView:(UIView*)view duration:(CGFloat)duration rotations:(CGFloat)rotations repeat:(float)repeat;
{
CABasicAnimation* rotationAnimation;
rotationAnimation = [CABasicAnimation animationWithKeyPath:@"transform.rotation.z"];
rotationAnimation.toValue = [NSNumber numberWithFloat: M_PI * 2.0 /* full rotation*/ * rotations * duration ];
rotationAnimation.duration = duration;
rotationAnimation.cumulative = YES;
rotationAnimation.repeatCount = repeat;
[view.layer addAnimation:rotationAnimation forKey:@"rotationAnimation"];
}
它运行良好，但并不是我真正想要的。我想要那个，当我的按钮被点击时，按钮将把图像“reload_selected.png”(我为 UIControlStateSelected 设置)作为背景，然后运行动画。动画结束后，按钮必须再次返回到它的实际背景(“refresh_icon.png”)。
任何人都可以建议对代码进行一些更改以帮助我实现上述操作吗？预先感谢您的帮助。