Question

即使图像下载并成功显示，我也很困惑为什么错误块正在调用。我在日志中得到的错误是，

错误=错误域= NSURLErrorDomain代码= -1002＆＃34;不支持的URL＆＃34; UserInfo = 0x7fe7840d8000 {NSUnderlyingError = 0x7fe781d5b5e0＆＃34;不支持的URL＆＃34;，NSErrorFailingURLStringKey =，NSErrorFailingURLKey =，NSLocalizedDescription =不支持的URL}

即使我收到此错误，我也可以获取图片，解析并在应用中显示。我在这个代码中哪里错了，

@try{
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_BACKGROUND, 0), ^{
NSURL *url = [NSURL URLWithString:imageUrl];
NSURLRequest *req = [NSURLRequest requestWithURL:url];
[NSURLConnection sendAsynchronousRequest:req queue:[[NSOperationQueue alloc] init] completionHandler:^(NSURLResponse *res, NSData *data, NSError *error){
 UIImage *thumbImage = nil;
 if ([data length] >0 && error == nil){
    NSLog(@"image was downloaded.");
    thumbImage = [UIImage imageWithData:data];
 }
 else if ([data length] == 0 && error == nil){
    NSLog(@"Nothing was downloaded.");
    [loaderView removeFromSuperview];
 }
 else if (error != nil){
    NSLog(@"Error = %@", error);
    [loaderView removeFromSuperview];
 }
  dispatch_async(dispatch_get_main_queue(), ^{
    imageViewtoApply.image = thumbImage;
    [webServiceDelegate imageDownloadFinished];
    [loaderView removeFromSuperview];
    });
   }];
 });
}

Answer 1

检查http状态代码，它可能是错误代码。

将回复转发给JTable并检查NSHTTPURLResponse属性。

statusCode

成功通话后不支持的URL错误

1 个答案: