Question

我正在开发iPhone应用程序。我创建了UIImage视图，单击图像视图，导航一个自定义视图并加载Web视图。在该视图中，我在工具栏中有一个工具栏和一个条形按钮。单击栏按钮时，将删除自定义视图。我的问题是有时自定义视图没有正确删除。我不知道为什么它没有删除，因为方法调用正确。但是“removeFromSuperview”有时不起作用。我认为自定义视图实例正在多次创建，我该如何避免？请帮帮我！

我的代码在这里，

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event  (Touch Event for Image view)
{
     [super touchesBegan:touches withEvent:event];

   _imgView.userInteractionEnabled = YES;

     UITouch *touch = [[event allTouches] anyObject];

    if([touch view] == _imgView)
     {
        [self customWebview];

     }
}

    -(void) customWebview   
   {
      // Creating custom view and loading a web view  

         custView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 320, 432)] autorelease];

        web.frame = CGRectMake(0, 0, 320, 432);

         web = [[[UIWebView alloc] initWithFrame:CGRectMake(0, 0, 320, 432)] autorelease];

         web.delegate = self;

         web.scalesPageToFit =YES;

         [self.view addSubview:custView];

         [custView addSubview:web];

         UIToolbar *tool = [[[UIToolbar alloc] initWithFrame:CGRectMake(0, 432, 320, 48)] autorelease];

         tool.barStyle = UIBarStyleBlackOpaque; 

         UIBarButtonItem *closeBtn =[[[UIBarButtonItem alloc] initWi thBarButtonSystemItem:UIBarButtonSystemItemStop target:self action:@selector(action)] autorelease];

         tool.items = [NSArray arrayWithObjects:space,closeBtn,nil];

         NSURL *url = [NSURL URLWithString:WebUrlString];

         NSURLRequest *req = [NSURLRequest requestWithURL:url];

         [web loadRequest:req];
     }

     -(void) action  
     {
         [custView removeFromSuperview];

       // This method is called properly, but some times the custom view is not removed, so how can i solve this issue?

     }

请帮助我。

谢谢！

Answer 1

使用标记识别视图并从superView中删除。

之后添加以下行

  custView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 320, 432)] autorelease];    
  custView.tag = 10; // Any Number

For removing View
   UIView *tmpView = (UIView *)[self.view viewWithTag:10]; 
   //ViewWithTag Number should be same as used while allocating
   [tmpView removeFromSuperview];

Answer 2

也许你不止一次添加自定义视图？加上这个：

[custView removeFromSuperview];

之前

 custView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 320, 432)] autorelease];

如何删除子视图在iPhone中单击UIBar按钮时？

2 个答案: