缩放、旋转动画

#import#import "FKViewController.h"

@implementation FKViewController

CALayer *imageLayer;

- (void)viewDidLoad

{

[super viewDidLoad];

// 创建一个CALayer对象

imageLayer = [CALayer layer];

// 设置该CALayer的边框、大小、位置等属性

imageLayer.cornerRadius = 6;

imageLayer.borderWidth = 1;

imageLayer.borderColor = [UIColor blackColor].CGColor;

imageLayer.masksToBounds = YES;

imageLayer.frame = CGRectMake(30, 30, 100, 135);

// 设置该imageLayer显示的图片

imageLayer.contents = (id)[[UIImage imageNamed:@"android"] CGImage];

[self.view.layer addSublayer:imageLayer];

NSArray* bnTitleArray = [NSArray arrayWithObjects:@"位移"

, @"旋转" , @"缩放" , @"动画组" , nil];

// 获取屏幕的内部高度

CGFloat totalHeight = [UIScreen mainScreen].bounds.size.height;

NSMutableArray* bnArray = [[NSMutableArray alloc] init];

// 采用循环创建4个按钮

for(int i = 0 ; i < 4 ; i++)

{

UIButton* bn = [UIButton buttonWithType:UIButtonTypeRoundedRect];

bn.frame = CGRectMake(5 + i * 80, totalHeight - 45 - 20 , 70 , 35);

[bn setTitle:[bnTitleArray objectAtIndex:i]

forState:UIControlStateNormal];

[bnArray addObject:bn];

[self.view addSubview:bn];

}

// 为4个按钮绑定不同的事件处理方法

[[bnArray objectAtIndex:0] addTarget:self action:@selector(move:)

forControlEvents:UIControlEventTouchUpInside];

[[bnArray objectAtIndex:1] addTarget:self action:@selector(rotate:)

forControlEvents:UIControlEventTouchUpInside];

[[bnArray objectAtIndex:2] addTarget:self action:@selector(scale:)

forControlEvents:UIControlEventTouchUpInside];

[[bnArray objectAtIndex:3] addTarget:self action:@selector(group:)

forControlEvents:UIControlEventTouchUpInside];

}

-(void) move:(id)sender

{

CGPoint fromPoint = imageLayer.position;

CGPoint toPoint = CGPointMake(fromPoint.x + 80 , fromPoint.y);

// 创建不断改变CALayer的position属性的属性动画

CABasicAnimation* anim = [CABasicAnimation

animationWithKeyPath:@"position"];

// 设置动画开始的属性值

anim.fromValue = [NSValue valueWithCGPoint:fromPoint];

// 设置动画结束的属性值

anim.toValue = [NSValue valueWithCGPoint:toPoint];

anim.duration = 0.5;

imageLayer.position = toPoint;

anim.removedOnCompletion = YES;

// 为imageLayer添加动画

[imageLayer addAnimation:anim forKey:nil];

}

-(void) rotate:(id)sender

{

// 创建不断改变CALayer的transform属性的属性动画

CABasicAnimation* anim = [CABasicAnimation animationWithKeyPath:@"transform"];

CATransform3D fromValue = imageLayer.transform;

// 设置动画开始的属性值

anim.fromValue = [NSValue valueWithCATransform3D:fromValue];

// 绕X轴旋转180度

CATransform3D toValue = CATransform3DRotate(fromValue, M_PI , 1 , 0 , 0);

// 绕Y轴旋转180度

// CATransform3D toValue = CATransform3DRotate(fromValue, M_PI , 0 , 1 , 0);

// // 绕Z轴旋转180度

// CATransform3D toValue = CATransform3DRotate(fromValue, M_PI , 0 , 0 , 1);

// 设置动画结束的属性值

anim.toValue = [NSValue valueWithCATransform3D:toValue];

anim.duration = 0.5;

imageLayer.transform = toValue;

anim.removedOnCompletion = YES;

// 为imageLayer添加动画

[imageLayer addAnimation:anim forKey:nil];

}

-(void) scale:(id)sender

{

// 创建不断改变CALayer的transform属性的属性动画

CAKeyframeAnimation* anim = [CAKeyframeAnimation

animationWithKeyPath:@"transform"];

// 设置CAKeyframeAnimation控制transform属性依次经过的属性值

anim.values = [NSArray arrayWithObjects:

[NSValue valueWithCATransform3D:imageLayer.transform],

[NSValue valueWithCATransform3D:CATransform3DScale

(imageLayer.transform , 0.2, 0.2, 1)],

[NSValue valueWithCATransform3D:CATransform3DScale

(imageLayer.transform, 2, 2 , 1)],

[NSValue valueWithCATransform3D:imageLayer.transform], nil];

anim.duration = 5;

anim.removedOnCompletion = YES;

// 为imageLayer添加动画

[imageLayer addAnimation:anim forKey:nil];

}

-(void) group:(id)sender

{

CGPoint fromPoint = imageLayer.position;

CGPoint toPoint = CGPointMake(280 , fromPoint.y + 300);

// 创建不断改变CALayer的position属性的属性动画

CABasicAnimation* moveAnim = [CABasicAnimation

animationWithKeyPath:@"position"];

// 设置动画开始的属性值

moveAnim.fromValue = [NSValue valueWithCGPoint:fromPoint];

// 设置动画结束的属性值

moveAnim.toValue = [NSValue valueWithCGPoint:toPoint];

moveAnim.removedOnCompletion = YES;

// 创建不断改变CALayer的transform属性的属性动画

CABasicAnimation* transformAnim = [CABasicAnimation

animationWithKeyPath:@"transform"];

CATransform3D fromValue = imageLayer.transform;

// 设置动画开始的属性值

transformAnim.fromValue = [NSValue valueWithCATransform3D: fromValue];

// 创建缩放为X、Y两个方向上缩放为0.5的变换矩阵

CATransform3D scaleValue = CATransform3DScale(fromValue , 0.5 , 0.5, 1);

// 绕Z轴旋转180度的变换矩阵

CATransform3D rotateValue = CATransform3DRotate(fromValue, M_PI , 0 , 0 , 1);

// 计算两个变换矩阵的和

CATransform3D toValue = CATransform3DConcat(scaleValue, rotateValue);

// 设置动画技术的属性值

transformAnim.toValue = [NSValue valueWithCATransform3D:toValue];

// 动画效果累加

transformAnim.cumulative = YES;

// 动画重复执行2次，旋转360度

transformAnim.repeatCount = 2;

transformAnim.duration = 3;

// 位移、缩放、旋转组合起来执行

CAAnimationGroup *animGroup = [CAAnimationGroup animation];

animGroup.animations = [NSArray arrayWithObjects:moveAnim

, transformAnim , nil];

animGroup.duration = 6;

// 为imageLayer添加动画

[imageLayer addAnimation:animGroup forKey:nil];

}

@end