CABasicAnimation－平移

//平移
- (void)animationTranslate{
    //创建layer
    CALayer *layer =[CALayer layer];
    layer.bounds = CGRectMake(0, 0, 100, 100);
    layer.position = CGPointMake(100,100);
    layer.backgroundColor = [UIColor yellowColor].CGColor;
    [self.view.layer addSublayer:layer];

    //1.创建动画对象
    CABasicAnimation *animation = [CABasicAnimation animation];
    //2.设置动画
    //  keyPath  决定了执行怎样的动画
    animation.keyPath = @"position";
    // toValue 到达哪个点，byValue是增加多少值,fromValue 从哪个点开始移动
    animation.toValue = [NSValue valueWithCGPoint:CGPointMake(200, 200)];
    animation.duration = 2;
    animation.removedOnCompletion = NO;//动画执行完毕后不删除动画
    //保持最新的状态
    animation.fillMode = @"forwards";
    //3.添加动画
    [layer addAnimation:animation forKey:nil];
}