#import <QuartzCore/CALayer.h>
#import <Foundation/NSObject.h>

@class NSArray, NSString, CAMediaTimingFunction, CAValueFunction;


@interface CAAnimation : NSObject
    <NSCoding, NSCopying, CAMediaTiming, CAAction>
{
@private
  void *_attr;
  uint32_t _flags;
}

+ (id)animation;    // 创建动画
+ (id)defaultValueForKey:(NSString *)key;
- (BOOL)shouldArchiveValueForKey:(NSString *)key;

@property(retain) CAMediaTimingFunction *timingFunction;
@property(retain) id delegate;  // 代理
@property(getter=isRemovedOnCompletion) BOOL removedOnCompletion; // 完成后是否回到原来的地方

@end

#pragma - mark - 代理方法
@interface NSObject (CAAnimationDelegate)

- (void)animationDidStart:(CAAnimation *)anim;
- (void)animationDidStop:(CAAnimation *)anim finished:(BOOL)flag;

@end


#pragma - mark - 属性动画，修改属性
@interface CAPropertyAnimation : CAAnimation

+ (id)animationWithKeyPath:(NSString *)path;
@property(copy) NSString *keyPath; // KVC的键
@property(getter=isAdditive) BOOL additive;
@property(getter=isCumulative) BOOL cumulative;
@property(retain) CAValueFunction *valueFunction;

@end



@interface CABasicAnimation : CAPropertyAnimation

#pragma - mark toValue是最终的值，byValue是在原来基础上增加的值
@property(retain) id fromValue, toValue, byValue;

@end

#pragma - mark - 关键帧动画，根据path一帧一帧的放动画
@interface CAKeyframeAnimation : CAPropertyAnimation

@property(copy) NSArray *values;    // 所有的取值
@property CGPathRef path;           // 指定动画的路径，会忽略设置的values， 锚点始终在路径上
@property(copy) NSArray *keyTimes;  // 时间数组
@property(copy) NSArray *timingFunctions; // 时间函数
@property(copy) NSString *calculationMode;
@property(copy) NSArray *tensionValues, *continuityValues, *biasValues;
@property(copy) NSString *rotationMode;

@end


CA_EXTERN NSString * const kCAAnimationLinear
    __OSX_AVAILABLE_STARTING (__MAC_10_5, __IPHONE_2_0);
CA_EXTERN NSString * const kCAAnimationDiscrete
    __OSX_AVAILABLE_STARTING (__MAC_10_5, __IPHONE_2_0);
CA_EXTERN NSString * const kCAAnimationPaced
    __OSX_AVAILABLE_STARTING (__MAC_10_5, __IPHONE_2_0);
CA_EXTERN NSString * const kCAAnimationCubic
    __OSX_AVAILABLE_STARTING (__MAC_10_7, __IPHONE_4_0);
CA_EXTERN NSString * const kCAAnimationCubicPaced
    __OSX_AVAILABLE_STARTING (__MAC_10_7, __IPHONE_4_0);


CA_EXTERN NSString * const kCAAnimationRotateAuto
    __OSX_AVAILABLE_STARTING (__MAC_10_5, __IPHONE_2_0);
CA_EXTERN NSString * const kCAAnimationRotateAutoReverse
    __OSX_AVAILABLE_STARTING (__MAC_10_5, __IPHONE_2_0);

#pragma - mark - 转场动画
@interface CATransition : CAAnimation

@property(copy) NSString *type;         // 动画种类，主要是样式
@property(copy) NSString *subtype;      // 子动画种类，主要是方向
@property float startProgress, endProgress;
@property(retain) id filter;

@end


CA_EXTERN NSString * const kCATransitionFade    
    __OSX_AVAILABLE_STARTING (__MAC_10_5, __IPHONE_2_0);
CA_EXTERN NSString * const kCATransitionMoveIn
    __OSX_AVAILABLE_STARTING (__MAC_10_5, __IPHONE_2_0);
CA_EXTERN NSString * const kCATransitionPush
    __OSX_AVAILABLE_STARTING (__MAC_10_5, __IPHONE_2_0);
CA_EXTERN NSString * const kCATransitionReveal
    __OSX_AVAILABLE_STARTING (__MAC_10_5, __IPHONE_2_0);


CA_EXTERN NSString * const kCATransitionFromRight
    __OSX_AVAILABLE_STARTING (__MAC_10_5, __IPHONE_2_0);
CA_EXTERN NSString * const kCATransitionFromLeft
    __OSX_AVAILABLE_STARTING (__MAC_10_5, __IPHONE_2_0);
CA_EXTERN NSString * const kCATransitionFromTop
    __OSX_AVAILABLE_STARTING (__MAC_10_5, __IPHONE_2_0);
CA_EXTERN NSString * const kCATransitionFromBottom
    __OSX_AVAILABLE_STARTING (__MAC_10_5, __IPHONE_2_0);


#pragma - mark -
@interface CAAnimationGroup : CAAnimation

@property(copy) NSArray *animations;

@end