NS_CLASS_AVAILABLE_IOS(7_0)

@interface UIMotionEffect : NSObject <NSCopying, NSCoding>

- (instancetype)init NS_DESIGNATED_INITIALIZER;

- (nullable instancetype)initWithCoder:(NSCoder *)aDecoder NS_DESIGNATED_INITIALIZER;

//观察者的角度偏移viewerOffset，获取运动视觉效果的各项属性和值

- (nullable NSDictionary<NSString *, id> *)keyPathsAndRelativeValuesForViewerOffset:(UIOffset)viewerOffset;

@end

typedef NS_ENUM(NSInteger, UIInterpolatingMotionEffectType) {

    UIInterpolatingMotionEffectTypeTiltAlongHorizontalAxis,//X轴

    UIInterpolatingMotionEffectTypeTiltAlongVerticalAxis//Y轴

};

@interface UIInterpolatingMotionEffect : UIMotionEffect

- (instancetype)initWithKeyPath:(NSString *)keyPath type:(UIInterpolatingMotionEffectType)type NS_DESIGNATED_INITIALIZER;//初始化

- (nullable instancetype)initWithCoder:(NSCoder *)aDecoder NS_DESIGNATED_INITIALIZER;

@property (readonly, nonatomic) NSString *keyPath;//获取角度偏移

@property (readonly, nonatomic) UIInterpolatingMotionEffectType type;//获取类型

@property (nullable, strong, nonatomic) id minimumRelativeValue;//最小角度偏移

@property (nullable, strong, nonatomic) id maximumRelativeValue;//最大角度偏移

@end

@interface UIMotionEffectGroup : UIMotionEffect

@property (nullable, copy, nonatomic) NSArray<__kindof UIMotionEffect *> *motionEffects;//添加水平和垂直效果添加到对应UI上

@end

- (void)addEffectWithOffset:(NSInteger)offset withView:(UIView *)view{

    UIInterpolatingMotionEffect *effectX = [[UIInterpolatingMotionEffect alloc] initWithKeyPath:@"center.x" type:UIInterpolatingMotionEffectTypeTiltAlongHorizontalAxis];

    effectX.minimumRelativeValue = @(-offset);

    effectX.maximumRelativeValue = @(offset);

    UIInterpolatingMotionEffect *effectY = [[UIInterpolatingMotionEffect alloc] initWithKeyPath:@"center.y" type:UIInterpolatingMotionEffectTypeTiltAlongVerticalAxis];

    effectY.minimumRelativeValue = @(-offset/);

    effectY.maximumRelativeValue = @(offset/);

//    UIMotionEffectGroup *group = [[UIMotionEffectGroup alloc] init];

//    group.motionEffects = @[effectX,effectY];

    view.motionEffects = @[effectX,effectY];

}