如果点击 ScrollView，则隐藏/显示按钮和 UIImageVIew

Posted 2023-03-21

【中文标题】如果点击 ScrollView，则隐藏/显示按钮和 UIImageVIew

【英文标题】：Hide/Show Button and UIImageVIew if Tap on a ScrollView

【发布时间】：2013-09-02 14:26:18

【问题描述】：

如何通过点击滚动视图来隐藏/显示UIButton 和ImageView？

编辑：

我仅将它用于 Button 和 Tap on the View：

- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event

   UITouch *touch = [touches anyObject];
   CGPoint loc = [touch locationInView:[touch view]];
   if (!CGRectContainsPoint(btn1.frame, loc) || (!CGRectContainsPoint(btn2.frame, loc)
   
      btn1.hidden = !btn1.hidden;
      btn2.hidden = !btn2.hidden;
   

【参考方案1】：

UITapGestureRecognizer *scrlTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(scrlTapREcotTap:)];
    [scrlTap setNumberOfTapsRequired:1];
    [self.ScrollView addGestureRecognizer:scrlTap];

在.h文件中取BOOL isTappFirstTime;，在viewDidLoad方法中写入isTappFirstTime = YES;

写下手势方法；

- (void)scrlTapREcotTap:(UITapGestureRecognizer *)gestureRecognizer

  if(isTappFirstTime)
   
       //put code of hide 

     [UIView animateWithDuration:1.0 animations:^
           button.alpha = 0;
           imgView.alpha = 0; 
            completion: ^(BOOL finished) 
             button.hidden = YES;
             imgView.hidden = YES;
      ];        
     isTappFirstTime = NO;
  
  else 
  
     // put code of show
     [UIView animateWithDuration:1.0 animations:^
       button.alpha = 1;
       imgView.alpha = 1; 
        completion: ^(BOOL finished) 
         button.hidden = NO;
         imgView.hidden = NO;
  ]; 
     isTappFirstTime = YES;
  

【讨论】：

Perfekt 谢谢 :) 我怎样才能添加这个淡出？

淡出是什么意思？？

ImageView 和 Button “柔和地”隐藏在 alpha 1.0 到 0.0 之间的漂亮动画中

好的，我使用了你的代码，但“淡出”效果很好，但“淡入”不起作用，没有动画

@Nils 检查***.com/questions/9637711/… 和***.com/questions/8047536/…