使用NSJSONSerializer iOS发布http JSON请求

这是我的代码:

在我的.m

NSArray *keys = [NSArray arrayWithObjects:@"Training_Code", @"Training_Duration",@"Training_Startdate",@"Training_Enddate",@"Trainer_ID",@"Training_Location",@"Comments",@"Keyword",@"NumberofDays", nil]; NSArray *objects = [NSArray arrayWithObjects:@"Training_Code", @"Training_Duration",@"Training_Startdate",@"Training_Enddate",@"Trainer_ID",@"Training_Location",@"Comments",@"Keyword",@"NumberofDays", nil]; NSData *jsonData; NSString *jsonString; NSDictionary *jsonDictionary = [NSDictionary dictionaryWithObjects:objects forKeys:keys]; if([NSJSONSerialization isValidJSONObject:jsonDictionary]) { jsonData = [NSJSONSerialization dataWithJSONObject:jsonDictionary options:0 error:nil]; jsonString = [[NSString alloc]initWithData:jsonData encoding:NSUTF8StringEncoding]; } // Be sure to properly escape your url string. NSURL *url1 = [NSURL URLWithString:@"http://xx.xx.xx.xxx/DeployiOSCalender/service1.asmx"]; NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url1]; [request setHTTPMethod:@"POST"]; [request setHTTPBody: jsonData]; [request setValue:@"application/json" forHTTPHeaderField:@"Content-Type"]; [request setValue:[NSString stringWithFormat:@"%d", [jsonData length]] forHTTPHeaderField:@"Content-Length"]; NSError *errorReturned = nil; NSURLResponse *theResponse =[[NSURLResponse alloc]init]; NSData *data = [NSURLConnection sendSynchronousRequest:request returningResponse:&theResponse error:&errorReturned]; if (errorReturned) { // Handle error. } else { NSError *jsonParsingError = nil; NSArray *jsonArray = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers|NSJSONReadingAllowFragments error:&jsonParsingError]; } 

这将数据返回给:

 { d = "[{\"Training_Code\":\"1234 \",\"Training_Duration\":\"2hrs \",\"Training_Startdate\":\"14/02/2013 15:00:00\",\"Training_Enddate\":\"14/02/2013 17:00:00\",\"Trainer_ID\":1,\"Training_Location\":\"B-Wing Training room-4\",\"Comments\":\"C# training\",\"Keyword\":\"C#1234\",\"NumberofDays\":1},{\"Training_Code\":\"4321 \",\"Training_Duration\":\"16 \",\"Training_Startdate\":\"17/02/2013 10:30:00\",\"Training_Enddate\":\"17/02/2013 17:30:00\",\"Trainer_ID\":2,\"Training_Location\":\"A-Wing Training Room-6\",\"Comments\":\"Objective-C\",\"Keyword\":\"Obj-C4321\",\"NumberofDays\":2}]"; } 

格式不正确。 我想这样做:

 [{"Training_Code":"1234 ","Training_Duration":"2hrs ","Training_Startdate":"14/02/2013 15:00:00","Training_Enddate":"14/02/2013 17:00:00","Trainer_ID":1,"Training_Location":"B-Wing Training room-4","Comments":"C# training","Keyword":"C#1234","NumberofDays":1},{"Training_Code":"4321 ","Training_Duration":"16 ","Training_Startdate":"17/02/2013 10:30:00","Training_Enddate":"17/02/2013 17:30:00","Trainer_ID":2,"Training_Location":"A-Wing Training Room-6","Comments":"Objective-C","Keyword":"Obj-C4321","NumberofDays":2} 

注意:我的Web服务正在返回正确的json格式。

我还需要做些什么来实现这个目标。请指教。

您说您的Web服务正在返回正确的JSON, 但显然不是 。 您应该与您的Web服务开发人员交谈,并找出他们返回格式错误的JSON的原因。 简单地说,从Web服务中获取的内容无法解析为JSON – 除非您进行字符串提取(ugh)。

考虑您的响应数据,格式更好:

 { d = " [ { \"Training_Code\":\"1234 \", \"Training_Duration\":\"2hrs \", \"Training_Startdate\":\"14/02/2013 15:00:00\", \"Training_Enddate\":\"14/02/2013 17:00:00\", \"Trainer_ID\":1, \"Training_Location\":\"B-Wing Training room-4\", \"Comments\":\"C# training\", \"Keyword\":\"C#1234\", \"NumberofDays\":1 }, { \"Training_Code\":\"4321 \", \"Training_Duration\":\"16 \", \"Training_Startdate\":\"17/02/2013 10:30:00\", \"Training_Enddate\":\"17/02/2013 17:30:00\", \"Trainer_ID\":2, \"Training_Location\":\"A-Wing Training Room-6\", \"Comments\":\"Objective-C\", \"Keyword\":\"Obj-C4321\", \"NumberofDays\":2 } ] "; } 

首先,将您的数据响应转换为字符串:

 NSString *json = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding]; 

然后你需要将它从顶部剥离:

 { d = " 

而这从底部开始

  "; } 

然后,您可以使用以下代码替换所有转义的引号:

 json = [json stringByReplacingOccurrencesOfString:@"\\\"" withString:@"\""]; 

那时,你的字符串应该是可解析的JSON,如下所示:

 [ { "Training_Code":"1234 ", "Training_Duration":"2hrs ", "Training_Startdate":"14/02/2013 15:00:00", "Training_Enddate":"14/02/2013 17:00:00", "Trainer_ID":1, "Training_Location":"B-Wing Training room-4", "Comments":"C# training", "Keyword":"C#1234", "NumberofDays":1 }, { "Training_Code":"4321 ", "Training_Duration":"16 ", "Training_Startdate":"17/02/2013 10:30:00", "Training_Enddate":"17/02/2013 17:30:00", "Trainer_ID":2, "Training_Location":"A-Wing Training Room-6", "Comments":"Objective-C", "Keyword":"Obj-C4321", "NumberofDays":2 } ] 

所以你可以这样做:

 id object = [NSJSONSerialization JSONObjectWithData:[json dataUsingEncoding:NSUTF8StringEncoding] options:0 error:&error]; 

现在, object应该将包含两个记录的数组保存为字典。

但是,如果是我,我会回到网络服务开发人员并要求他们修复他们发送给你的回复。 你不应该处理所有这些字符串提取废话。

Trainer_ID和NumberofDays是原始的。 你不能按原样添加到NSArray中。 你应该把它们包装成NSNumber:

 NSArray *objects = [NSArray arrayWithObjects:Training_Code, Training_Duration,Training_Startdate,Training_Enddate,[NSNumber numberWithInt:Trainer_ID],Training_Location,Comments,Keyword,[NSNumber numberWithInt:NumberofDays], nil];