NSURLSession錯誤：錯誤的URL，在瀏覽器中工作

Question

我從下面的會話從Facebook獲取帖子，並返回'錯誤的網址'錯誤。當我使用相同的URL並在瀏覽器中打開它時，我會返回適當的JSON，內容包含完整的帖子。我的會議有什麼問題？謝謝。

- (void)loadFacebookPosts 
{ 
    NSURLSession *session = [NSURLSession sharedSession]; 
    [[session dataTaskWithURL:[NSURL URLWithString:@"https://graph.facebook.com/profileid/feed?fields=message,description,caption,name&access_token=appid|secret"] 
      completionHandler:^(NSData *data, 
           NSURLResponse *response, 
           NSError *error) { 

       NSLog(@"error: %@", error); 
       NSLog(@"data: %@", data); 
       NSLog(@"response: %@", response); 

      }] resume]; 
} 

控制檯：

2014-02-11 21:36:10.507 fbFetch [34365:310b] error: Error Domain=NSURLErrorDomain Code=-1000 "bad URL" UserInfo=0xc7844f0 {NSUnderlyingError=0xc634c90 "bad URL", NSLocalizedDescription=bad URL} 
2014-02-11 21:36:10.509 fbFetch [34365:310b] data: <> 
2014-02-11 21:36:10.510 fbFetch [34365:310b] response: (null) 

Answer 1

你嘗試：

NSString *strURL = [@"https://graph.facebook.com/profileid/feed?fields=message,description,caption,name&access_token=appid|secret" stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]; 

然後使用strURL創建NSURL。

Answer 2

您的網址包含非法字符 - '|'所以你需要在使用百分比編碼字符串之前創建它的URL：

NSString *URLString = @"https://graph.facebook.com/profileid/feed?fields=message,description,caption,name&access_token=appid|secret"; 
NSString *escapedURLString = [URLString stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]; 

NSURLSession *session = [NSURLSession sharedSession]; 
    [[session dataTaskWithURL:[NSURL URLWithString: escapedURLString] 
      completionHandler:^(NSData *data, 
           NSURLResponse *response, 
           NSError *error) { 

       NSLog(@"error: %@", error); 
       NSLog(@"data: %@", data); 
       NSLog(@"response: %@", response); 

      }] resume];