basicAnimation移动图形

@interface ViewController ()
@property(nonatomic,strong)CALayer *subLayer;
@end

[super viewDidLoad];
    //子层的设置 并加入到跟层中
    
    _subLayer = [[CALayer alloc]init];
    _subLayer.backgroundColor = [[UIColor redColor]CGColor];
    _subLayer.bounds = CGRectMake(0, 0, 100, 100);
    _subLayer.position = CGPointMake(100, 100);
    _subLayer.cornerRadius = 50;
    
    [self.view.layer addSublayer:self.subLayer];
    
    //创建一个手势
    UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(tap:)];
    
    //设置几根手指点  点几次
    tap.numberOfTouchesRequired = 1;
    tap.numberOfTapsRequired = 1;
    
    //给view添加手势
    [self.view addGestureRecognizer:tap ];

-(void)tap:(UITapGestureRecognizer*)sender
{
    /*找到点击点 然后将点击点设置成 动画的toValue*/
    CGPoint location = [sender locationInView:self.view];
    //创建动画 并设置其属性
    CABasicAnimation *basic = [[CABasicAnimation alloc]init];
    //动画时间 和 keyPath
    basic.duration = 3.0f;
    basic.keyPath = @"position";
    
    //将下一点进行封装后 赋值给basic的下一点
    NSValue *mytoValue = [NSValue valueWithCGPoint:location];
    basic.toValue = mytoValue;
    //设置能够呆在最后的位置不动
    basic.removedOnCompletion = NO;
    basic.fillMode = kCAFillModeForwards;
    
    //给动画添加代理（很重要）
    basic.delegate = self;
    
    //将动画添加给subLayer
    [self.subLayer addAnimation:basic forKey:@"basic"];
    
}

-(void)animationDidStop:(CAAnimation *)anim finished:(BOOL)flag
{
    NSValue *toValue = ((CABasicAnimation*)anim).toValue;
    self.subLayer.position = [toValue CGPointValue];
}