一丶源码

#import <pop/POPPropertyAnimation.h>

/**
  基础动画
 */
@interface POPBasicAnimation : POPPropertyAnimation

/**
  类创建实例
 */
+ (instancetype)animation;

/**
 指定属性动画;
 */
+ (instancetype)animationWithPropertyNamed:(NSString *)name;

/**
使用kCAMediaTimingFunctionDefault 定时功能的基本动画;
 */
+ (instancetype)defaultAnimation;

/**
 @使用kCAMediaTimingFunctionLinear 定时功能的基本动画;
 */
+ (instancetype)linearAnimation;

/**
 @使用kCAMediaTimingFunctionEaseIn 定时功能的基本动画;
 */
+ (instancetype)easeInAnimation;

/**
 @使用kCAMediaTimingFunctionEaseOut 定时功能的基本动画;
 */
+ (instancetype)easeOutAnimation;

/**
 @使用kCAMediaTimingFunctionEaseIn 定时功能的基本动画;
 */
+ (instancetype)easeInEaseOutAnimation;

/**
 延迟多少秒执行动画:Defaults to 0.4.
 */
@property (assign, nonatomic) CFTimeInterval duration;

/**
 设置动画节奏,默认使用:kCAMediaTimingFunctionDefault

CA_EXTERN NSString * const kCAMediaTimingFunctionLinear
    CA_AVAILABLE_STARTING (10.5, 2.0, 9.0, 2.0);
CA_EXTERN NSString * const kCAMediaTimingFunctionEaseIn
    CA_AVAILABLE_STARTING (10.5, 2.0, 9.0, 2.0);
CA_EXTERN NSString * const kCAMediaTimingFunctionEaseOut
    CA_AVAILABLE_STARTING (10.5, 2.0, 9.0, 2.0);
CA_EXTERN NSString * const kCAMediaTimingFunctionEaseInEaseOut
    CA_AVAILABLE_STARTING (10.5, 2.0, 9.0, 2.0);
CA_EXTERN NSString * const kCAMediaTimingFunctionDefault
    CA_AVAILABLE_STARTING (10.6, 3.0, 9.0, 2.0);

 */
@property (strong, nonatomic) CAMediaTimingFunction *timingFunction;

@end

二丶问题及使用:

以下图来之:http://www.cocoachina.com/ios/20150728/12734.html
/** Timing function names. **/

CA_EXTERN NSString * const kCAMediaTimingFunctionLinear

Linear.png

CA_EXTERN NSString * const kCAMediaTimingFunctionEaseIn

EaseIn.png

CA_EXTERN NSString * const kCAMediaTimingFunctionEaseOut

EasyInEasyOut.png

CA_EXTERN NSString * const kCAMediaTimingFunctionEaseInEaseOut

EasyInEasyOut.png

简单使用;后期介绍property

POPBasicAnimation * butAnimation = [POPBasicAnimation animationWithPropertyNamed:kPOPViewCenter];
butAnimation.duration = 1.0f;
butAnimation.toValue = [NSValue valueWithCGSize:CGSizeMake(_btn.centerX,_btn.centerY + 400)];
[_btn pop_addAnimation:butAnimation forKey:@"btn_Animation"];

三丶其他:

翻译有问题,留言告诉我下,谢谢;
以及有使用问题也可以留言,一起探讨探讨;