1.动画效果实现难度的推断

2.将看到的动画效果拆分成小模块

3.将写好的小模块组合成你所须要的动画效果

一，新建一个BaseAnimationView主控类

@interface BaseAnimationView :UIView

- (void)show;

- (void)hide;

- (void)buildView;

@end

#import "BaseAnimationView.h"

#import "CircleView.h"

#import "LineView.h"

@interface BaseAnimationView ()

@property (nonatomic,strong) CircleView *circleView;

@property (nonatomic,strong) RectView   *lineView;

@end

@implementation BaseAnimationView

- (void)show {

    [self.circleViewshow];

    [self.lineViewshow];

}

- (void)hide {

    [self.circleViewhide];

    [self.lineViewhide];

}

- (void)buildView {

    self.circleView = [[CircleViewalloc] initWithFrame:CGRectZero];

    [selfaddSubview:self.circleView];

    self.lineView = [[RectViewalloc] initWithFrame:CGRectZero];

    [selfaddSubview:self.lineView];

}

@end

二、新建CircleView,LineView类。方法名都统一，此两类被BaseAnimationView控制

@interface CircleView :UIView

- (void)show;

- (void)hide;

- (void)buildView;

@end

#import "CircleView.h"

@implementation CircleView

- (void)show {}

- (void)hide {}

- (void)buildView {}

@end

@interface LineView : UIView

- (void)show;

- (void)hide;

- (void)buildView;

@end

#import "LineView.h"

@implementation LineView

- (void)show {}

- (void)hide {}

- (void)buildView {}

@end

三、使用复杂的动画被写进了BaseAnimationView其中。没有暴露不必要的细节，便于维持

- (void)viewDidLoad {

    [superviewDidLoad];

    // 复杂的动画被写进了BaseAnimationView其中，没有暴露不必要的细节

    BaseAnimationView *baseView = [[BaseAnimationViewalloc] initWithFrame:CGRectZero];

    [self.viewaddSubview:baseView];

    [baseViewshow];

}

四、总结

1.制定统一的动画接口

2.动画中的高内聚低耦合原理

3.设计动画函数的注意事项

4.用里氏代换原则来处理动画类的继承问题

5.动画中的模块化设计