知识架构

1、CALayer 图层类

2、CABasicAnimation 基础动画

3、CAKeyFrameAnimation 帧动画

4、CATransition 转场动画

5、CAAnimationGroup 动画组  　

layer的基本概念　

　其实UIView之所以能显示在屏幕上，完全是因为它内部的一个图层，在创建UIView对象时，UIView内部会自动创建一个图层（CALyer对象），通过UIView的layer属性可以访问这个层。

基本属性　　

Bounds;position;frame;backgroundColor; opacity;cornerRadius;borderWidth; borderColor;shadowOffset; shadowColor; shadowOpacity;

我写了一些简单的demo，大家可以看看.......  

// //  ViewController.m

 //  简单的动画// 

//  Created by 李盼盼 on 16/5/16. 

//  Copyright © 2016年 李盼盼. All rights reserved. 

//  #import "ViewController.h"  

 @interface ViewController () 

 @property (strong, nonatomic) CALayer *subLayer;

 @property (strong, nonatomic) UIView *redView;

 @property (strong, nonatomic) CALayer *subLayer2;  

 @property (weak, nonatomic) IBOutlet UIImageView *imageView; 

 @property (assign, nonatomic) NSInteger currentIndex;

 @end 

 @implementation ViewController 

 - (void)viewDidLoad {  

  self.view.backgroundColor = [UIColor colorWithRed:234/255.0f green:234/255.0f blue:234/255.0f alpha:1];  

  [super viewDidLoad]; 

//    行走的方块    _subLayer = [[CALayer alloc]init];    

 _subLayer.frame = CGRectMake(50, 50, 50, 50); 

   _subLayer.backgroundColor = [UIColor redColor].CGColor;    [self.view.layer addSublayer:_subLayer];     

 //    旋转放大的方块  

  _redView = [[UIView alloc]initWithFrame:CGRectMake(200, 100, 50, 50)];    _redView.backgroundColor = [UIColor yellowColor];  

  [self.view addSubview:_redView]; 

   //    慢慢放大的方块   

 _subLayer2 = [[CALayer alloc]init]; 

 _subLayer2.frame = CGRectMake(50, 250, 50, 50);           _subLayer2.backgroundColor = [UIColor grayColor].CGColor;     [self.view.layer addSublayer:_subLayer2];   

   //    仿真翻页  

  _imageView.image = [UIImage imageNamed:@"a0.jpg"];   

 _currentIndex = 0;     

 } 

#pragma mark ---- 上一张 

- (IBAction)Last:(UIButton *)sender {   

 if (_currentIndex == 0) {    

    _currentIndex = 12;   

 }else{        _currentIndex--;   

 }       

   _imageView.image = [UIImage imageNamed:[NSString  stringWithFormat:@"a%ld.jpg",_currentIndex]];   

   //    转场动画  

  CATransition *anim = [CATransition animation]; 

//    过度类型 

   anim.type = @"pageUnCurl"; 

//    动画过渡方向   

 anim.subtype = @"fromTop";   

 anim.duration = 0.8;    

 [_imageView.layer addAnimation:anim forKey:nil]; }

  #pragma mark ---- 下一张 

- (IBAction)next:(UIButton *)sender {

    if (_currentIndex == 12) {   

     _currentIndex = 0;   

 }else{        _currentIndex++; 

   }    

_imageView.image = [UIImage imageNamed:[NSString  stringWithFormat:@"a%ld.jpg",_currentIndex]];  

CATransition *anim = [CATransition animation];   

anim.type = @"pageCurl"; 

 anim.subtype = kCATransitionFromBottom;    

 anim.duration = 0.8;    

 [_imageView.layer addAnimation:anim forKey:nil];    

      }

-(void)touchesBegan:(NSSet*)touches withEvent:(UIEvent *)event

{    

 #pragma mark ---- 旋转放大的动画    

CABasicAnimation *rotationAnim = [CABasicAnimation animation];  

//    rotationAnim.duration = 2;  

rotationAnim.keyPath = @"transform.rotation.z";  

rotationAnim.toValue = @(3.14);  

rotationAnim.repeatCount = MAXFLOAT; 

CABasicAnimation *scaleAnim = [CABasicAnimation animation];    scaleAnim.duration = 2; 

scaleAnim.keyPath = @"transform";   

scaleAnim.toValue = [NSValuevalueWithCATransform3D:CATransform3DMakeScale(2, 2, 0)];    scaleAnim.repeatCount = MAXFLOAT; 

CAAnimationGroup *group = [CAAnimationGroup animation];    group.animations = @[rotationAnim,scaleAnim];  

group.duration = 5;    

 group.fillMode = kCAFillModeForwards; 

 group.removedOnCompletion = NO; 

  [_redView.layer addAnimation:group forKey:nil]; 

}  

-(void)touchesEnded:(NSSet*)touches withEvent:(UIEvent *)event{

#pragma mark ---- 行走的方块

CAKeyframeAnimation *anim = [CAKeyframeAnimation animation];

anim.keyPath = @"position";

anim.duration = 5.0;

NSValue *value = [NSValue valueWithCGPoint:CGPointMake(50, 50)];

NSValue *value1 = [NSValue valueWithCGPoint:CGPointMake(50, 100)];

NSValue *value2 = [NSValue valueWithCGPoint:CGPointMake(100, 100)];

NSValue *value3 = [NSValue valueWithCGPoint:CGPointMake(100, 150)];

NSValue *value4 = [NSValue valueWithCGPoint:CGPointMake(100, 150)];

NSValue *value5 = [NSValue valueWithCGPoint:CGPointMake(50, 50)];

anim.values = @[value,value1,value2,value3,value4,value5];

// 设置动画的执行节奏

// kCAMediaTimingFunctionEaseInEaseOut:开始较慢，中间会加速，结束会减速

anim.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseOut];

[self.subLayer addAnimation:anim forKey:nil];

#pragma mark ---- 慢慢放大的方块

CABasicAnimation *anim1 = [CABasicAnimation animation];

//  动画执行是我时候修改属性

anim1.keyPath = @"bounds";

//    起始值

//    anim1.fromValue = [NSValue valueWithCGRect:CGRectMake(50, 250, 50, 50)];

//    目标值

anim1.toValue = [NSValue valueWithCGRect:CGRectMake(50, 250, 100, 100)];

anim1.delegate = self;

anim1.duration = 5;

[_subLayer2 addAnimation:anim1 forKey:@"animation"];

/**不删除动画，同时保存动画最终效果**/

// 动画结束后自动删除动画

anim.removedOnCompletion = NO;

// 默认保存原来的样式:设置为使用最新的样式

anim.fillMode = kCAFillModeForwards;

}

- (IBAction)removeAnim:(UIButton *)sender {

[_subLayer2 removeAnimationForKey:@"animation"];

}

#pragma mark ---- 动画的代理

-(void)animationDidStart:(CAAnimation *)anim{

NSLog(@"%s",__func__);

}

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

NSLog(@"%s",__func__);

}

@end

效果如下：