简单的动画效果

1.想看效果图

Untitled3.gif

2.代码展示

#import "ViewController.h"

@interface ViewController ()

@end
CALayer *imageLayer;
@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    //创建一个CALayer对象
    imageLayer = [[CALayer alloc]init];
    //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(130, 230, 200, 150);
    //设置该imageLayer显示的图片
    imageLayer.contents = (id)[[UIImage imageNamed:@"娇娇.jpg"]CGImage];
    [self.view.layer addSublayer:imageLayer];
    
    NSArray *arr = @[@"位移",@"旋转",@"缩放",@"动画组"];
    //获取屏幕高度
    CGFloat toheight = [UIScreen mainScreen].bounds.size.height;
    //采用循环创建四个按钮
    for (int i = 0 ; i < arr.count ; i ++) {
        UIButton *Btn = [UIButton buttonWithType:UIButtonTypeRoundedRect];
        Btn.frame = CGRectMake(5 + i * 80, toheight - 65, 70, 35);
        [Btn setTitle:arr[i] forState:UIControlStateNormal];
        Btn.tag = 1017 + i;
        NSLog(@"%ld",(long)Btn.tag);
        [Btn addTarget:self action:@selector(click:) forControlEvents:UIControlEventTouchUpInside];
        [self.view addSubview:Btn];
    }
}
-(void)click:(UIButton *)sender
{
    if (sender.tag == 1017) {
        
        CGPoint fromPoint  = imageLayer.position;
        CGPoint toPoint = CGPointMake(fromPoint.x + 100, fromPoint.y+100);
        //创建不断改变CALayer的position属性的属性动画
        CABasicAnimation *animation = [CABasicAnimation animationWithKeyPath:@"position"];
        if (toPoint.x > 400) {
            toPoint.x = 100;
        }
        //设置动画开始的属性值
        animation.fromValue = [NSValue valueWithCGPoint:fromPoint];
        //设置动画结束的属性值
        animation.toValue = [NSValue valueWithCGPoint:toPoint];
        animation.duration = 1.0;
        imageLayer.position = toPoint;
        
        animation.removedOnCompletion = YES;
        //为imageLayer添加动画
        [imageLayer addAnimation:animation forKey:nil];
        
    }else if (sender.tag == 1018)
    {
        //创建不断改变的CALayer的transform属性的属性动画
        CABasicAnimation *anmiton = [CABasicAnimation animationWithKeyPath:@"transform"];
        CATransform3D formValue = imageLayer.transform;
        //设置动画开始的属性值
        anmiton.fromValue = [NSValue valueWithCATransform3D:formValue];
        //绕x轴旋转180度
        CATransform3D toValue = CATransform3DRotate(formValue, M_PI, 1, 0, 0);
//        //绕y轴旋转180度
//        CATransform3D toValue = CATransform3DRotate(formValue, M_PI, 0, 1, 0);
//        //绕z轴旋转180度
//        CATransform3D toValue = CATransform3DRotate(formValue, M_PI, 0, 0, 1);
        //设置动画结束的属性值
        anmiton.toValue = [NSValue valueWithCATransform3D:toValue];
        anmiton.duration = 0.5;
        imageLayer.transform = toValue;
        anmiton.removedOnCompletion = YES;
        //为imageLayer添加动画
        [imageLayer addAnimation:anmiton forKey:nil];
        
    }else if (sender.tag == 1019)
    {
        //创建不断改变CALayer的tranform属性的属性动画
        CAKeyframeAnimation *animation = [CAKeyframeAnimation animationWithKeyPath:@"transform"];
        //设置CAKeyframeAnimation控制transform属性依次经过的属性值
        animation.values = [NSArray arrayWithObjects:
            [NSValue valueWithCATransform3D:imageLayer.transform],
            [NSValue valueWithCATransform3D:CATransform3DScale(imageLayer.transform, 0.2, 0.2, 1)],
            [NSValue valueWithCATransform3D:CATransform3DScale(imageLayer.transform, 5, 5, 1)],
            [NSValue valueWithCATransform3D:imageLayer.transform], nil];
        animation.duration = 1;
        animation.removedOnCompletion = YES;
        [imageLayer addAnimation:animation forKey:nil];
        
    }else if (sender.tag == 1020)
    {
        CGPoint fromPoint = imageLayer.position;
        CGPoint toPoint = CGPointMake(180, fromPoint.y + 200);
        // 创建不断改变CALayer的position属性的属性动画
        CABasicAnimation *moveAnimation = [CABasicAnimation animationWithKeyPath:@"position"];
        //设置动画结束的属性值
        moveAnimation.toValue = [NSValue valueWithCGPoint:toPoint];
        moveAnimation.removedOnCompletion = YES;
        //创建不断改变CALayer的transform属性的属性动画
        CABasicAnimation *transForm = [CABasicAnimation animationWithKeyPath:@"transform"];
        CATransform3D fromValue = imageLayer.transform;
        //设置动画的开始属性值
        transForm.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 totateValue = CATransform3DRotate(fromValue, M_PI, 0, 0, 1);
        //计算两个矩阵的和
        CATransform3D toValue = CATransform3DConcat(scaleValue, totateValue);
        //设置动画技术的属性值
        transForm.toValue = [NSValue valueWithCATransform3D:toValue];
        //动画效果累加
        transForm.cumulative = YES;
        //动画执行两次，旋转360度
        transForm.repeatCount = 2;
        transForm.duration = 3;
        //位移 、 缩放、 旋转组合起来执行
        CAAnimationGroup *groupAnimation = [CAAnimationGroup animation];
        groupAnimation.animations = [NSArray arrayWithObjects:moveAnimation,transForm, nil];
        groupAnimation.duration = 6;
        //为imageLayer添加动画
        [imageLayer addAnimation:groupAnimation forKey:nil];
    }
}

3.谢谢。