UISlider事件 [英] UISlider events

问题描述

我正在使用UISlider，它自动更新，除非用户正在触摸滑块。因此我在NSTimer自动更新的功能中执行了此操作：

  if（！isSliderTouched）{
 [progressSlider setValue：progressValue]; 
} 
  

当用户释放手指时，如何跟踪此事件的结局。只要用户与此控件进行交互，我想设置isSliderTouched。

编辑：这应该是情节：

1. 用户开始浏览/触摸UISlider => isSliderTouched = YES


2. 用户发布/未触摸
   
   
   

     UIControlEventTouchDown 
    UIControlEventTouchUpInside 
    [progressSlider addTarget：self action：@selector（sliderMoveStart）forControlEvents：UIControlEventTouchDown]; 
     

   cheers endo

   解决方案

   您可以使用：

   
   
   

   
- （void）addTarget：（id） action forControlEvents：（UIControlEvents）controlEvents


   
   
   

   检测 touchDown 和 touchUp 事件发生。您可以相应地设置您的标志。

   
   
   

   我从您的代码段猜测您使用UISlider作为进度表。你考虑过使用UIProgressView吗？

   
   

   I'm using an UISlider, its updated automatically except the user is touching the sliderbutton. therefore i did this in the function which updates automatically by an NSTimer:

   if (!isSliderTouched) {
       [progressSlider setValue: progressValue];
   }
   

   How do I track the ending of this event, when the user releases his finger. I want to set isSliderTouched as long as the user interacts with this control.

   EDIT: this should be the plot:

   1. user beginns draging/touching UISlider => isSliderTouched = YES
   2. user releases/untouch the UISlider => isSliderTouched = NO

   Solution:

   UIControlEventTouchDown
   UIControlEventTouchUpInside
   [progressSlider addTarget:self action:@selector(sliderMoveStart) forControlEvents:UIControlEventTouchDown];
   

   cheers endo

   解决方案

   You can use:

   - (void)addTarget:(id)target action:(SEL)action forControlEvents:(UIControlEvents)controlEvents

   to detect when the touchDown and touchUp events occur. You can set your flag accordingly.

   I'm guessing from your code snippet that you are using a UISlider as a progress meter. Have you considered using a UIProgressView instead?

   这篇关于UISlider事件的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！