Question

我是JSON的新手，我正在尝试发帖子，我想知道如何检查我是否正确完成或检查它的返回值。这就是我所做的

NSURL *url = [NSURL URLWithString:@"http://json.myurl.com/.....];
NSMutableURLRequest *request = [[NSMutableURLRequest alloc] initWithURL:url];
NSDictionary *tmp = [[NSDictionary alloc] initWithObjectsAndKeys:
                     @"email", @"Email",
                     @"password", @"FirstName",
                        nil];
NSError *error;
NSData *postdata = [NSJSONSerialization dataWithJSONObject:tmp options:0 error:&error];
[request setHTTPBody:postdata];

Answer 1

检查JSON POST返回值：

NSString  *strUrl=[NSString stringWithFormat:@"http://json.myurl.com/....."];

NSString *webStringURL = [strUrl stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
NSURL *url = [NSURL URLWithString:webStringURL];


NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];


NSDictionary *tmp = [[NSDictionary alloc] initWithObjectsAndKeys:
                     @"email", @"Email",
                     @"password", @"FirstName",
                     nil];

    NSError* error;
    NSData* postData = [NSJSONSerialization dataWithJSONObject:tmp options:NSJSONWritingPrettyPrinted error: &error];
    NSString *postLength = [NSString stringWithFormat:@"%lu", (unsigned long)[postData length]];
    [request setURL:url];
    [request setHTTPMethod:@"POST"];
    [request setValue:postLength forHTTPHeaderField:@"Content-Length"];
    [request setHTTPBody:postData];


[NSURLConnection sendAsynchronousRequest:request queue:[[NSOperationQueue alloc]init] completionHandler:^(NSURLResponse *response, NSData *jsonData, NSError *error)
 {

     if (!error)
     {

         NSDictionary *jsonResponse = [NSJSONSerialization JSONObjectWithData:jsonData options:NSJSONReadingMutableLeaves error:&error];


         dispatch_async(dispatch_get_main_queue(),^
                        {

                            NSLog(@"jsonResponse--->%@",jsonResponse);

                        });
     }
     else
     {

         dispatch_async(dispatch_get_main_queue(),^
                        {

                            NSLog(@"error--->%@",error.description);

                        });

     }


 }];

要检查JSON格式是否正确，请查看此link

Answer 2

对于初学者，我建议使用第三方框架，这种框架被世界各地的iOS开发人员广泛使用，称为AFNetworking。

通过使用AFHTTPSessionManager *manager = [[AFHTTPSessionManager alloc] initWithSessionConfiguration:[NSURLSessionConfiguration defaultSessionConfiguration]]; [manager POST:url parameters:parameters progress:nil success:^(NSURLSessionDataTask *task, id responseObject) { // TODO: Parse success here! } failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) { // TODO: Parse failure here! }];，HTTP请求非常简单：

responseObject

在给定的示例中，对象AFNetworking是API响应JSON对象的表示。

{{1}}的安装和进一步使用说明可在website。

中找到

如何检查JSON post返回值

2 个答案: