Question

我想禁用iPad的UI交互，直到使用Blocks

在后端的主线程上下载数据

我在加载时下载图像

-(void)downLoadImageData{ 
[self ShowActivityIndicator];

[iOSNetwork getImages:ImageID andEvent:eventID  
              onCompletion:^(NSString* result,NSError* error)
{
  dispatch_async(dispatch_get_main_queue(), ^{
    if(error)
    {
       [self stopFetch:@"Error while Processing"];
    }
    else
   {
      [[UIApplication sharedApplication] beginIgnoringInteractionEvents];
       [self stopFetch:result];

    }
   });
 }];
}

-(void) stopFetch:(NSString*) result{

  [self hideActivityIndicator];
   //after downloading completed
   [[UIApplication sharedApplication] endIgnoringInteractionEvents];
 }

Answer 1

您可以使用 MBProgressHud 。您需要将MBProgressHUD文件添加到项目中。

        AppDelegate *appDelegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];
        self.HUD = [[MBProgressHUD alloc] initWithWindow:appDelegate.window];
        [appDelegate.window addSubview:self.HUD];

        - (void)showHUDWithText:(NSString *)labelText{
            if (_isHUDAlreadyInProgress) {
                return;
            }
            _isHUDAlreadyInProgress = TRUE;
            [_HUD.superview bringSubviewToFront:_HUD];
            self.HUD.labelFont = [UIFont systemFontOfSize:13.0];
            //self.HUD.labelText = labelText;
            [self.HUD show:TRUE];
           }
- (void)hideHUD{
    _isHUDAlreadyInProgress = FALSE;
    [self.HUD hide:TRUE];
}

Answer 2

如果使用整个应用程序调用

[[UIApplication sharedApplication] beginIgnoringInteractionEvents];

下载完成后

[[UIApplication sharedApplication] endIgnoringInteractionEvents];

另一种选择

 [self.view setUserInteractionEnabled:NO];

完成后

  [self.view setUserInteractionEnabled:YES];

还有一个选择

  self.navigationController.navigationBar.userInteractionEnabled=NO;
  // perform other events also userInteractionEnabled=NO;

完成后

  self.navigationController.navigationBar.userInteractionEnabled=YES;
  // perform other events also userInteractionEnabled=NO;

在你的问题中

  -(void)downLoadImageData{ 
[self ShowActivityIndicator];


 [[UIApplication sharedApplication] beginIgnoringInteractionEvents];   // call here
[iOSNetwork getImages:ImageID andEvent:eventID  
              onCompletion:^(NSString* result,NSError* error)
{
  dispatch_async(dispatch_get_main_queue(), ^{
    if(error)
    {
       [self stopFetch:@"Error while Processing"];
    }
    else
   {

       [self stopFetch:result];

       // not here

    }
   });
 }];
}

禁用iPad的UI交互，直到数据在后端的主线程上下载

2 个答案: