iOS简单动画

　　　　　　　　　　　　　　　　　　　　　　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<UITouch *> *)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 = [NSValue valueWithCATransform3D: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<UITouch *> *)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：