IOS第18天(5,CABasicAnimation基本动画）

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#import "HMViewController.h"

@interface HMViewController ()

@property (nonatomic, weak) CALayer *layer;

@end

@implementation HMViewController

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.

    CALayer *layer = [CALayer layer];

    layer.position = CGPointMake(, );

    layer.bounds = CGRectMake(, , , );

    layer.backgroundColor = [UIColor redColor].CGColor;

    layer.contents = (id)[UIImage imageNamed:@"心"].CGImage;

    [self.view.layer addSublayer:layer];

    _layer = layer;

}

//旋转的动画
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
    // 创建动画对象
    CABasicAnimation *anim = [CABasicAnimation animation];

    // 设置动画的属性
    anim.keyPath = @"transform.scale";

    // 设置属性改变的值
    anim.toValue = @0.5;

    // 设置动画时长
    anim.duration = 0.25;

    // 取消反弹
    // 动画执行完毕之后不要把动画移除
    anim.removedOnCompletion = NO;

    // 保持最新的位置
    anim.fillMode = kCAFillModeForwards;

    // 重复动画的次数
    anim.repeatCount = MAXFLOAT;

    // 给图层添加了动画
    [_layer addAnimation:anim forKey:nil];

}
//移动的动画
- (void)position
{
    // 创建动画对象
    CABasicAnimation *anim = [CABasicAnimation animation];

    // 设置动画的属性
    anim.keyPath = @"position";

    // 设置属性改变的值
    anim.toValue = [NSValue valueWithCGPoint:CGPointMake(, )];

    // 设置动画时长
    anim.duration = ;

    // 取消反弹
    // 动画执行完毕之后不要把动画移除
    anim.removedOnCompletion = NO;

    // 保持最新的位置
    anim.fillMode = kCAFillModeForwards;

    // 给图层添加了动画
    [_layer addAnimation:anim forKey:nil];
}

@end