https://developers.facebook.com/apps
facebook/pop的使用
1：安装
pod 'pop', '~> 1.0'
#import <pop/POP.h>
步骤 2:创建动效
使用POP可以创建4类动效：: spring, decay, basic and custom.
Spring （弹性）动效可以赋予物体愉悦的弹性效果
POPSpringAnimation *anim = [POPSpringAnimation animationWithPropertyNamed:kPOPLayerBounds];
Decay （衰减) 动效可以用来逐渐减慢物体的速度至停止
POPDecayAnimation *anim = [POPDecayAnimation animationWithPropertyNamed:kPOPLayerPositionX];
Basic（基本）动效可以在给定时间的运动中插入数值调整运动节奏
POPBasicAnimation *anim = [POPBasicAnimation animationWithPropertyNamed:kPOPViewAlpha];
Custom（自定义）动效可以让设计值创建自定义动效，只需简单处理CADisplayLink，并联系时间-运动关系
在这片简短教程中将不涵盖自定义动效，大家可以看看POP的Github来获取更多进阶知识https://github.com/facebook/pop
步骤3: 给动效添加属性
Pop 让我们可以这样设置动效的属性:
velocity : anim.velocity = @(1000.);
fromValue: anim.fromValue = @(0.0);
toValue: anim.toValue = @(1.0);
bounciness: anim.springBounciness = 10;
步骤4 :动起来
若想让物体动起来，只需要添加步骤3所创建的东西到视图。
[self.yourView.layer pop_addAnimation:anim forKey:@"typeANameForYourAnimationHere"];
这就是POP简单创建动效的教程。大家可以看看例子来理解如何创建动效。争取努力变得技艺纯熟吧。
动效案例
///这个动效将按钮缩小到一半
-(void)scale {
POPSpringAnimation *scaleAnimation = [POPSpringAnimation animationWithPropertyNamed:kPOPLayerScaleXY];
scaleAnimation.toValue = [NSValue valueWithCGSize:CGSizeMake(0.7, 0.7)];
scaleAnimation.springBounciness = 10.f;
[self.Button.layer pop_addAnimation:scaleAnimation forKey:@"scaleAnim"];
}
///这个动效将按钮旋转
-(void)rotaion {
POPSpringAnimation *rotationAnimation = [POPSpringAnimation animationWithPropertyNamed:kPOPLayerRotation];
rotationAnimation.beginTime = CACurrentMediaTime() + 0.2;
rotationAnimation.toValue = @(1.2);
rotationAnimation.springBounciness = 10.f;
rotationAnimation.springSpeed = 3;
[self.Button.layer pop_addAnimation:rotationAnimation forKey:@"rotationAnim"];
}
//这个改变透明度：
-(void)Alpha {
POPBasicAnimation *opacityAnimation = [POPBasicAnimation animationWithPropertyNamed:kPOPLayerOpacity];
opacityAnimation.toValue = @(0.5);
[self.Button.layer pop_addAnimation:opacityAnimation forKey:@"opacityAnimation"];
}
Pop Github : https://github.com/facebook/pop
Popping -Pop案例 : https://github.com/schneiderandre/popping
