UIButton点击动画 ---pop动画

@interface FlatButton : UIButton

重写构造方法

+ (instancetype)button{    return [self buttonWithType:UIButtonTypeCustom];}- (id)initWithFrame:(CGRect)frame{    self = [super initWithFrame:frame];    if (self) {        [self setup];    }    return self;}-(id)initWithCoder:(NSCoder *)aDecoder{    self = [super initWithCoder:aDecoder];    if (self) {        [self setup];    }    return self;}

添加响应

//添加按下和进入的响应    [self addTarget:self action:@selector(scaleToSmall)   forControlEvents:UIControlEventTouchDown | UIControlEventTouchDragEnter];    //添加按下的响应    [self addTarget:self action:@selector(scaleAnimation)   forControlEvents:UIControlEventTouchUpInside];    //添加划出button范围的响应    [self addTarget:self action:@selector(scaleToDefault)   forControlEvents:UIControlEventTouchDragExit];

UIControlEventTouchDragExit  手指离开边界回调

An event where a finger is dragged from within a control to outside its bounds.

但是实际却是离开button边界70左右才回调

接下来使用到pop动画

- (void)scaleToSmall{    NSLog(@"scaletoSmall");    POPBasicAnimation *scaleAnimation = [POPBasicAnimation animationWithPropertyNamed:kPOPLayerScaleXY];    scaleAnimation.toValue = [NSValue valueWithCGSize:CGSizeMake(0.95f, 0.95f)];    [self.layer pop_addAnimation:scaleAnimation forKey:@"layerScaleSmallAnimation"];}- (void)scaleAnimation{    NSLog(@"scaleAnimation");    POPSpringAnimation *scaleAnimation = [POPSpringAnimation animationWithPropertyNamed:kPOPLayerScaleXY];    scaleAnimation.velocity = [NSValue valueWithCGSize:CGSizeMake(6.f, 6.f)];    scaleAnimation.toValue = [NSValue valueWithCGSize:CGSizeMake(1.f, 1.f)];    scaleAnimation.springBounciness = 22.0f;    [self.layer pop_addAnimation:scaleAnimation forKey:@"layerScaleSpringAnimation"];}- (void)scaleToDefault{    NSLog(@"scaletoDefault");    POPBasicAnimation *scaleAnimation = [POPBasicAnimation animationWithPropertyNamed:kPOPLayerScaleXY];    scaleAnimation.toValue = [NSValue valueWithCGSize:CGSizeMake(1.f, 1.f)];    [self.layer pop_addAnimation:scaleAnimation forKey:@"layerScaleDefaultAnimation"];}

设置一下标题偏移

- (UIEdgeInsets)titleEdgeInsets{    //top, left, bottom, right    return UIEdgeInsetsMake(4.f,                            28.f,                            4.f,                            28.f);}

控件的内置大小 --- 由控件本身的内容所决定的

- (CGSize)intrinsicContentSize{    CGSize s = [super intrinsicContentSize];    return CGSizeMake(s.width + self.titleEdgeInsets.left + self.titleEdgeInsets.right,                      s.height + self.titleEdgeInsets.top + self.titleEdgeInsets.bottom);    }