iOS 中的 JSON 发布不起作用（.NET 服务器）

Posted 2023-03-15

【中文标题】iOS 中的 JSON 发布不起作用（.NET 服务器）

【英文标题】：JSON posting in iOS not working (.NET server)

【发布时间】：2013-05-03 11:01:34

【问题描述】：

无法向 .NET 服务器发送请求。

NSDictionary *jsonDict = [NSDictionary dictionaryWithObjects:objects forKeys:keys];

NSURL *postURL = [NSURL URLWithString: @"SOME URL"];
NSError *error=nil;
NSData *jsonData = [NSJSONSerialization  dataWithJSONObject:jsonDict options:0 error:&error];


NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL: postURL
                                                       cachePolicy: NSURLRequestUseProtocolCachePolicy
                                                   timeoutInterval: 60.0];

[request setHTTPMethod: @"POST"];
[request setValue: @"application/json" forHTTPHeaderField: @"Accept"];
[request setValue: @"application/json" forHTTPHeaderField: @"Content-Type"];
[request setValue:[NSString stringWithFormat:@"%d",[jsonData length]] forHTTPHeaderField:@"Content-Length"];
[request setHTTPBody: jsonData];

NSLog(@"JSON summary: %@", [[NSString alloc] initWithData:jsonData
                                                encoding:NSUTF8StringEncoding]);

输出是：

"CreatedBy":"","EmailAddress":"[e-mail]","Zipcode":"","FirstName":"devan","DeviceCategoryID:":"","State":"","CustomerTypeID:":"",.......... like this.....

但它的Json对象必须是：

(CreatedBy:"",EmailAddress:"[e-mail]",Zipcode:"",FirstName:"devan",DeviceCategoryID::"",State:"",CustomerTypeID:""  )

我正在使用 .Net 服务器进行发帖。

请求未发布到服务器。请任何人帮助我。

【问题讨论】：

输出看起来正确。请花 10 分钟学习JSON format。如果您无法在服务器端解析此 json，则问题出在其他地方。

您可以随时使用json.parser.online.fr 来验证您的输出。

【参考方案1】：

NSString *urlString = @"Your Web Service URL";

NSString *parameterString = @"XYZ";

NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];
[request setURL:[NSURL URLWithString:urlString]];
[request setHTTPMethod:@"POST"];

NSMutableData *body = [NSMutableData data];

//  parameter
[body appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"parameter_key\"\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:parameterString dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[@"\r\n" dataUsingEncoding:NSUTF8StringEncoding]];

// close form
[body appendData:[[NSString stringWithFormat:@"--%@--\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];


// setting the body of the post to the reqeust
[request setHTTPBody:body];

// now lets make the connection to the web
NSData *returnData = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];
NSString *returnString = [[NSString alloc] initWithData:returnData encoding:NSUTF8StringEncoding];

NSLog(@"returnString %@",returnString);