在导航时停止webview加载

Question

基本上我有一个web浏览器，当点击某些文件扩展名时会打开一个新的视图控制器来查看图像。在iOS 6中，[webView stopLoading]在停止webview以通过视图控制器方面完美地工作。

由于升级到iOS 7，这只会工作一次或两次，但然后它会打开webview中的图像，并通过视图控制器。

下面是我与以前的工作在IOS 6

任何帮助，将不胜感激。

/////////////// 
//IMAGE CODE/// 
/////////////// 
       //Image file links 
       NSURL *imageURl = [request URL]; 
       NSString *imageFileExtension = [[imageURl absoluteString] pathExtension]; 

       //Image file extensions 
       NSLog(@"fileExtension is: %@", imageFileExtension); 
       if ([imageFileExtension hasSuffix:@"png"] || [imageFileExtension hasSuffix:@"jpg"] || [imageFileExtension hasSuffix:@"jpeg"] || [imageFileExtension hasSuffix:@"gif"] || [imageFileExtension hasSuffix:@"bmp"] || [imageFileExtension hasSuffix:@"raw"] || [imageFileExtension hasSuffix:@"PNG"] || [imageFileExtension hasSuffix:@"JPG"] || [imageFileExtension hasSuffix:@"JPEG"] || [imageFileExtension hasSuffix:@"GIF"] || [imageFileExtension hasSuffix:@"BMP"] || [imageFileExtension hasSuffix:@"RAW"]) { 

        [webView stopLoading]; 
        [UIApplication sharedApplication].networkActivityIndicatorVisible = NO; 

        //Image manager 
        WebImageViewController * vc = [[WebImageViewController alloc] initWithURL:[request URL]]; 
        [self.navigationController pushViewController:vc animated:YES]; 
        [vc release]; 

       }else{ 

        //Image file links 
        NSURL *imageURl = [request URL]; 
        NSString *imageFileExtension = [imageURl pathExtension]; 

        //Image file extensions 
        NSLog(@"fileExtension is: %@", imageFileExtension); 
       if ([imageFileExtension hasSuffix:@"png"] || [imageFileExtension hasSuffix:@"jpg"] || [imageFileExtension hasSuffix:@"jpeg"] || [imageFileExtension hasSuffix:@"gif"] || [imageFileExtension hasSuffix:@"bmp"] || [imageFileExtension hasSuffix:@"raw"] || [imageFileExtension hasSuffix:@"PNG"] || [imageFileExtension hasSuffix:@"JPG"] || [imageFileExtension hasSuffix:@"JPEG"] || [imageFileExtension hasSuffix:@"GIF"] || [imageFileExtension hasSuffix:@"BMP"] || [imageFileExtension hasSuffix:@"RAW"]) {       

        [webView stopLoading]; 
        [UIApplication sharedApplication].networkActivityIndicatorVisible = NO; 

        //Image manager 
        WebImageViewController * vc = [[WebImageViewController alloc] initWithURL:[request URL]]; 
        [self.navigationController pushViewController:vc animated:YES]; 
        [vc release]; 

        }else{ 

        //Image file links 
        NSURL *imageURl = [request URL]; 
        NSString *imageFileExtension = [imageURl absoluteString]; 

        //Image file extensions 
        NSLog(@"fileExtension is: %@", imageFileExtension); 
       if ([imageFileExtension hasSuffix:@"png"] || [imageFileExtension hasSuffix:@"jpg"] || [imageFileExtension hasSuffix:@"jpeg"] || [imageFileExtension hasSuffix:@"gif"] || [imageFileExtension hasSuffix:@"bmp"] || [imageFileExtension hasSuffix:@"raw"] || [imageFileExtension hasSuffix:@"PNG"] || [imageFileExtension hasSuffix:@"JPG"] || [imageFileExtension hasSuffix:@"JPEG"] || [imageFileExtension hasSuffix:@"GIF"] || [imageFileExtension hasSuffix:@"BMP"] || [imageFileExtension hasSuffix:@"RAW"]) {        

        [webView stopLoading]; 
        [UIApplication sharedApplication].networkActivityIndicatorVisible = NO; 

        //Image manager 
        WebImageViewController * vc = [[WebImageViewController alloc] initWithURL:[request URL]]; 
        [self.navigationController pushViewController:vc animated:YES]; 
        [vc release]; 

Answer 1

所以我觉得我设法让这个工作。随着一些重新编码和调整我想出了这个：

 NSURL *imageURl = [request URL]; 
     NSString *imageFileExtension = [[imageURl absoluteString] pathExtension]; 

     NSSet *supportedFileExtensions = [NSSet setWithObjects:@"png", @"jpg", @"jpeg", @"gif", @"bmp", @"pdf", @"raw", nil]; 

     if ([supportedFileExtensions containsObject:[imageFileExtension lowercaseString]]) { 

      [webView stopLoading]; 

      //Image manager 
      [UIApplication sharedApplication].networkActivityIndicatorVisible = NO; 

      WebImageViewController * vc = [[WebImageViewController alloc] initWithURL:[request URL]]; 
      [self.navigationController pushViewController:vc animated:YES]; 
      [vc release];