Question

我试图弄清楚如何从我的http响应中解析JSON。目前我正在使用NSURLSession任务发送帖子请求并获得响应和结果如下：

NSURLSessionConfiguration *defaultConfigObject = [NSURLSessionConfiguration defaultSessionConfiguration];
     NSURLSession *defaultSession = [NSURLSession sessionWithConfiguration: defaultConfigObject delegate: nil delegateQueue: [NSOperationQueue mainQueue]];

     NSURL * url = [NSURL URLWithString:@"http://mysite.org/mobile_app/studentregister.php"];
     NSMutableURLRequest * urlRequest = [NSMutableURLRequest requestWithURL:url];
     NSString * params = [NSString stringWithFormat:@"username=%@&displayname=%@&password=%@&passwordc=%@&email=%@&teachercode=%@", username, displayname, password, passwordc, email, teacherCode];
     [urlRequest setHTTPMethod:@"POST"];
     [urlRequest setHTTPBody:[params dataUsingEncoding:NSUTF8StringEncoding]];

     NSURLSessionDataTask * dataTask =[defaultSession dataTaskWithRequest:urlRequest
     completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
     NSHTTPURLResponse *HTTPResponse = (NSHTTPURLResponse *)response;
     NSError *serializeError = nil;
     NSDictionary *jsonData = [NSJSONSerialization
                                   JSONObjectWithData:data
                                   options:NSJSONReadingMutableContainers
                                   error:&serializeError];

     NSLog(@"Response:%@ %@\n", response, error);
     if(error == nil)
     {
     NSString * text = [[NSString alloc] initWithData: data encoding: NSUTF8StringEncoding];
     NSLog(@"Data = %@",text);
     }

     }];

现在，当我运行请求并记录以下响应时：

{"userCharLimit":"Your username must be between 5 and 25 characters in length"}{"displaynameCharLim":"Your displayname must be between 5 and 25 characters in length"}{"passLimit":"Your password must be between 8 and 50 characters in length"}{"emailInvalid":"Not a valid email address"}{"teacherCodeLength":"Your teacher code is not 5 to 12 characters"}
<!DOCTYPE html PUBLIC '-//W3C//DTD XHTML 1.0 Transitional//EN' 'http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd'>
<html xmlns='http://www.w3.org/1999/xhtml'>
<head>
<meta http-equiv='Content-Type' content='text/html; charset=utf-8' />

但我怎样才能解析：

{"userCharLimit":"Your username must be between 5 and 25 characters in length"}{"displaynameCharLim":"Your displayname must be between 5 and 25 characters in length"}{"passLimit":"Your password must be between 8 and 50 characters in length"}{"emailInvalid":"Not a valid email address"}{"teacherCodeLength":"Your teacher code is not 5 to 12 characters"} in ios?

Answer 1

看一下NSJSONSerialization类。您将传递来自URL Connection的数据并返回基础对象的“对象图”。在你的情况下，看起来你会得到一本字典。

但更好的是使用AFNetworking。它可以在Github或CocoaPods上使用，并使所有这些东西变得非常容易。

NSURLSession：从NSURLResponse获取Json

1 个答案: