[BS-26] UIView、pop和Core Animation区别

UIView、pop和Core Animation区别

一、UIView、pop和Core Animation的主要区别

1. Core Animation的动画只能添加到layer上(layer.position和view.frame类似)

2. pop的动画能添加到任何对象

3. pop的底层并非基于Core Animation, 是Facebook用OC和C++开发的基于CADisplayLink动画

4. Core Animation的动画仅仅是表象, 并不会真正修改对象的frame\size等值，通常用在不需要与用户交互的动画(如转场动画/下载进度动画)

5. pop和UIView实现的动画实时修改对象的属性, 真正地修改了对象的属性

二、pop动画应用举例

    //弹簧动画
    POPSpringAnimation *ani1 = [POPSpringAnimation animationWithPropertyNamed:kPOPViewAlpha];
    [self.imgView pop_addAnimation:ani1 forKey:@"anim1"]; //可以通过[self.imgView pop_removeAnimationForKey:@"anim1"];移除该动画
    ani1.fromValue = @1.0;
    ani1.toValue = @0.0;

    //基本的属性动画
    POPBasicAnimation *anim2 = [POPBasicAnimation animationWithPropertyNamed:kPOPViewBackgroundColor];
    //anim2.property = [POPAnimatableProperty propertyWithName:kPOPViewBackgroundColor];
    [self.imgView pop_addAnimation:anim2 forKey:@"anim2"];
    anim2.fromValue = [UIColor greenColor];
    anim2.toValue = [UIColor yellowColor];

    //衰减动画
    //POPDecayAnimation *anim3 = [POPDecayAnimation animationWithPropertyNamed:kPOPViewFrame];

    //自定义动画
    //POPCustomAnimation *anim4 = [POPCustomAnimation animationWithBlock:<#^BOOL(id target, POPCustomAnimation *animation)block#>];

//延迟动画的方法
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event

{

        POPSpringAnimation *anim = [POPSpringAnimation animationWithPropertyNamed:kPOPViewCenter];

        anim.springBounciness = ;

        anim.springSpeed = ;

        anim.fromValue = [NSValue valueWithCGPoint:CGPointMake(, )];

        anim.toValue = [NSValue valueWithCGPoint:CGPointMake(, )];

        [self.sloganView pop_addAnimation:anim forKey:nil];

        POPSpringAnimation *anim = [POPSpringAnimation animationWithPropertyNamed:kPOPLayerPositionY];

        anim.beginTime = CACurrentMediaTime() + 1.0;  //延迟执行

        anim.springBounciness = ;

        anim.springSpeed = ;

        anim.fromValue = @(self.sloganView.layer.position.y);

        anim.toValue = @();

        anim.completionBlock = ^(POPAnimation *anim, BOOL finished){

            NSLog(@"-----动画结束");

        };

        [self.sloganView.layer pop_addAnimation:anim forKey:nil];

}

三、pop学习资料

1. https://github.com/facebook/pop

2. https://github.com/schneiderandre/popping

3. https://github.com/MartinRGB/LearnCube-iOS

4. POPAnimation给NSObject添加的分类方法

//NSObject添加的分类，任何对象都可以调用如下方法
@implementation NSObject (POP)

- (void)pop_addAnimation:(POPAnimation *)anim forKey:(NSString *)key
{
  [[POPAnimator sharedAnimator] addAnimation:anim forObject:self key:key];
}

- (void)pop_removeAllAnimations
{
  [[POPAnimator sharedAnimator] removeAllAnimationsForObject:self];
}

- (void)pop_removeAnimationForKey:(NSString *)key
{
  [[POPAnimator sharedAnimator] removeAnimationForObject:self key:key];
}

- (NSArray *)pop_animationKeys
{
  return [[POPAnimator sharedAnimator] animationKeysForObject:self];
}

- (id)pop_animationForKey:(NSString *)key
{
  return [[POPAnimator sharedAnimator] animationForObject:self key:key];
}

@end

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