上升动画

-(CABasicAnimation *)moveX:(float)time X:(NSNumber *)x
{
    CABasicAnimation *animation = [CABasicAnimation animationWithKeyPath:@"transform.translation.y"];///.y的话就向下移动。
    animation.toValue = x;
    animation.duration = time;
    animation.removedOnCompletion = NO;//yes的话，又返回原位置了。
    animation.repeatCount = MAXFLOAT;
    animation.fillMode = kCAFillModeForwards;
    return animation;
}