UIView 在 Timer 上设置动画 [英] UIView animates away on Timer

问题描述

所以有一个 UITextField 并且我在字段上有字符限制.如果用户尝试输入更大的内容，UIView 就会出现.我已经把那部分动画化了.这是我所拥有的:

So there is a UITextField and I have a limit of characters on the field. If user tries to enter anything bigger, UIView appears. I already have that part animated. Here is what I have:

public void animateHoursMesg() {

    var HoursMesgExpandPos = new PointF (248.0f, 273.0f);
    var HoursMesgInitPos = new PointF (400.0f, 273.0f);
    UIView.Animate (
        duration: 0.3f,
        delay: 0,
        options: UIViewAnimationOptions.CurveEaseInOut,
        animation: () => {
            if (Flag_HoursMesg) {
                view_HoursLimitMesg.Center = HoursMesgInitPos;
                Flag_HoursMesg = false;
            } else {
                view_HoursLimitMesg.Center = HoursMesgExpandPos;
                Flag_HoursMesg = true;
            }
        },
        completion: () => {
        }
    );
}

问题是我希望这个视图在出现 5 秒后动画化.

The problem is I want this view to animate away 5 seconds after it appears.

有人可以帮我解决这个问题吗?

Can someone please help me with this?

感谢您的宝贵时间.

推荐答案

在 animate 方法的完成块中，使用 NSTimer 安排一个块从那时起执行 5 秒.

In your completion block on the animate method, use an NSTimer to schedule a block to execute 5 seconds from then.

[NSTimer scheduledTimerWithTimeInterval:5.0
                                 target:self
                               selector:@selector(animateAway)
                               userInfo:nil
                                repeats:NO];

然后为 animateAway 创建另一个方法来反转您之前的动画.

Then just create another method for the animateAway that reverses your previous animation.

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