在压入和持有情况下使UIButton不断燃烧的方法？ [英] Way to make a UIButton continuously fire during a press-and-hold situation?

问题描述

您知道当您按住D-Pad上的右键时，Mario是如何继续向右移动的？以同样的方式，我希望我的UIButton持续触发它的动作，持续它的持续时间。这是可能的UIButton吗？如果不是，这是否可能与UIImageView通过以某种方式重写触摸处理方法？实际上，在尝试做到这一点与UIButton做之前，我有一些UIImageViews（排列作为一个D-Pad），通过触摸处理方法检查，但事情开始变得凌乱所以我认为这可以通过使用UIButton更容易，切换。

You know how Mario just keeps running to the right when you press and hold the right-button on the D-Pad? In the same manner, I want my UIButton to continuously fire its action for the duration that it is held down. Is this possible for a UIButton? If not, is this possible to do with a UIImageView by overriding a touch handling method in a certain way? Actually, before trying to do get this done with UIButton I had some UIImageViews (Arranged to function as a D-Pad) that were checked by touch handling methods but things started to get messy so I thought this could be done easier with UIButton and thus switched over. Anybody who knows how to get recognition of a continuous, stationary (not-moved) down-touch, please share.

推荐答案

任何人都知道如何获得连续，固定（非移动）下触的识别。不使用按钮，使用多点触摸和NSTimer：

Don't use a button, use multi-touch and NSTimer:

在接口中创建一个视图本地NSTimer对象，然后使用它来启动/取消计时器

Make a view-local NSTimer object inside your interface, then use it to start/cancel the timer

-(void)movePlayer:(id)sender {
   <Code to move player>
}

-(void)touchesBegan:(NSSet*)touches  withEvent:(UIEvent*)event {
    timer = [NSTimer scheduledTimerWithTimeInterval:0.3 target:self selector:@selector(movePlayer:) userInfo:nil repeats:YES];
}

-(void)touchesEnded:(NSSet*)touches  withEvent:(UIEvent*)event {
   if (timer != nil) 
      [timer invalidate];
      timer = nil;
}

-(void)touchesMoved:(NSSet*)touches  withEvent:(UIEvent*)event {
    if (timer != nil) {
       [timer invalidate];
       timer = nil;
    }
}

这样，间隔，而不必依赖于按钮，并获得重复的行为，你正在寻找。
注意touchesMoved触发器 - 如果他们移动他们的手指，这取消了计时器，播放器停止移动。

This way, you can repeat the event at a predefined interval, and not have to rely on a button, and get the repeat behaviour you're looking for. Note the touchesMoved trigger - if they move their finger, this cancels the timer, and the player stops moving.

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