Question

我收到一个无效的JSON字符串，其中包含; （字符。猜猜发生了什么事？

我的代码：

-(void)getJSONFeed {  
    // Create the URL & Request      
 NSURL *feedURL = [NSURL URLWithString:      
   @"http://maps.googleapis.com/maps/api/geocode/json?      address=1600+Amphitheatre+Parkway,+Mountain+View,+CA&sensor=true"];    
 NSURLRequest *request = [NSURLRequest requestWithURL:feedURL];  
 // Example connection only. Add Timeouts, cachingPolicy in production  
 [NSURLConnection connectionWithRequest:request delegate:self ];  
 // init the jsonData Property  
 jsonData = [[NSMutableData data] retain];  
}  

// NSURLConnection Delegate Methods. You would want to include more for error handling //  
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSMutableData *)data {  
 NSLog(@"Recieving Data...");  
 // Append the incomming data as it is received  
 [jsonData appendData:data];  
 NSLog(@"%@",jsonData);  
}  

-(NSDictionary *)parseJSON:(NSMutableData *)data {  
 NSLog(@"Parsing JSON");       
 NSError *error = nil;  
 NSDictionary *dictionary = [[CJSONDeserializer deserializer]   deserializeAsDictionary:data error:&error];  
 return dictionary;  
}  

// Parse JSON results with TouchJSON. It converts it into a dictionary.  


-(void)connectionDidFinishLoading:(NSURLConnection *)connection {  
 NSLog(@"Fininshed Loading...");  
 NSDictionary * feedDictionary = [self parseJSON:jsonData];  
 NSLog(@"JSON as NSDictionary: %@", feedDictionary);  
}  

{  
    results =     (
                {
            "address_components" =             (
                                {
                    "long_name" = 1600;
                    "short_name" = 1600;
                    types =                     (
                        "street_number"
                    );
                },
                                {
                    "long_name" = "Amphitheatre Pkwy";
                    "short_name" = "Amphitheatre Pkwy";
                    types =                     (
                        route
                    );
                },
                                {
                    "long_name" = "Mountain View";
                    "short_name" = "Mountain View";
                    types =                     (
                        locality,
                        political
                    );
                },
                                {
                    "long_name" = "San Jose";
                    "short_name" = "San Jose";
                    types =                     (
                        "administrative_area_level_3",
                        political
                    );
                },
                                {
                    "long_name" = "Santa Clara";
                    "short_name" = "Santa Clara";
                    types =                     (
                        "administrative_area_level_2",
                        political
                    );
                },
                                {
                    "long_name" = California;
                    "short_name" = CA;
                    types =                     (
                        "administrative_area_level_1",
                        political
                    );
                },
                                {
                    "long_name" = "United States";
                    "short_name" = US;
                    types =                     (
                        country,
                        political
                    );
                },
                                {
                    "long_name" = 94043;
                    "short_name" = 94043;
                    types =                     (
                        "postal_code"
                    );
                }
            );
            "formatted_address" = "1600 Amphitheatre Pkwy, Mountain View, CA 94043, USA";
            geometry =             {
                location =                 {
                    lat = "37.422782";
                    lng = "-122.085099";
                };
                "location_type" = ROOFTOP;
                viewport =                 {
                    northeast =                     {
                        lat = "37.4259296";
                        lng = "-122.0819514";
                    };
                    southwest =                     {
                        lat = "37.4196344";
                        lng = "-122.0882466";
                    };
                };
            };
            types =             (
                "street_address"
            );
        }
    );
    status = OK;
}

更新

不知何故，它将其解释为属性列表。格式似乎与原始的NeXTSTEP格式相似=;

Answer 1

我不是100％确定问题是什么。你做了一个有效的HTTP连接，这会从Google发出一个有意义的请求（如果删除中间的六个空格，几乎可以肯定是代码复制并粘贴到这里）。你积累了结果。在给定的代码中，您似乎泄漏了对象jsonData，但我认为这与问题无关。

你使用我从未听说过的CJSONDeserializer对象，但似乎在Google上常被提及，因此可能值得信赖。它返回一个有效的NSDictionary。您打印字典并且其中包含正确的结果。

当您将字典打印到控制台时，它是否与您收到的JSON看起来不一样？那么那就是因为它不再有任何来自JSON和Cocoa的概念早于JSON标准，因此不会用它来记录。

在任何情况下，feedDictionary都是有效的字典。以下内容：

NSLog(@"%@", [feedDictionary objectForKey:@"status"]);

会打印字符串'OK'。这样：

NSArray *addressComponents = [feedDictionary objectForKey:@"address_components"];
for(NSDictionary *component in addressComponents)
{
    NSLog(@"%@", [component objectForKey:@"long_name"]);
}

按顺序打印字符串'1600'，'Amphitheatre Pkwy'，'Mountain View'，'San Jose'，'Santa Clara'，'California'，'United States'，'94043'。

如果你想将原始JSON打印到控制台，你可能想要这样的东西（假设结果以UTF8的形式返回）：

-(void)connectionDidFinishLoading:(NSURLConnection *)connection {  
 NSLog(@"Fininshed Loading...");  

 NSString *feedString = [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding];
 NSLog(@"JSON was: %@", feedString);
 [feedString release];

 /*NSDictionary * feedDictionary = [self parseJSON:jsonData];  
 NSLog(@"JSON as NSDictionary: %@", feedDictionary);  */
}

虽然那时你仍然需要将它解析为字典以从中获得有意义的结果。

无效的touchJSON字符串

1 个答案: