Question

我正以下列方式向服务器发送请求：

- (void) getData
{
    NSString *url=  @"http://example.com";

    NSMutableURLRequest *theRequest= [NSMutableURLRequest requestWithURL:[NSURL URLWithString:url]
                                                         cachePolicy:NSURLRequestUseProtocolCachePolicy
                                                     timeoutInterval:10.0];

exampleConnection =[[NSURLConnection alloc] initWithRequest:theRequest delegate:self startImmediately:YES];

}

为此，响应是一个JSON文件，我将解析如下：

- (void)connectionDidFinishLoading:(NSURLConnection *)connection
{
    NSLog(@"Connection did finish loading %@",[connection currentRequest]);

    NSDictionary *exampleDictionary = [NSJSONSerialization JSONObjectWithData:receivedData options: NSJSONReadingAllowFragments error:nil];

    NSLog(@"%@", exampleDictionary); // which gives me null

}

之前的反应很好。但现在它给了我一个null，这显然是因为某些东西阻碍了从JSON到NSDictionary的转换。我调查并发现问题是因为有几个外来字符（中文或其他），解析过程出错了。

我不知道如何解决这个问题。有没有人有任何想法？

Answer 1

我玩了类和编码选项，最后做了以下操作，解决了这个问题。

- (void)connectionDidFinishLoading:(NSURLConnection *)connection
{

    NSLog(@"Connection did finish loading %@",[connection currentRequest]);

    NSString *res = [[NSString alloc] initWithData:receivedData encoding:NSASCIIStringEncoding];

    NSDictionary *exampleDictionary = [NSJSONSerialization JSONObjectWithData:[res dataUsingEncoding:NSUTF8StringEncoding] options: NSJSONReadingAllowFragments error:nil];

    NSLog(@"%@", exampleDictionary); // gives the actual data! :)

}

从URL解析JSON响应会给出<null> </null>

1 个答案: