如何在objective-c中创建json [英] how to create json in objective-c

问题描述

NSData* jsonDataToSendTheServer;

NSDictionary *setUser = [NSDictionary
            dictionaryWithObjectsAndKeys:[@"u" stringByAppendingString:my.id],@"id",
                                        @"GET_USER_INFO",@"command",
                                        @"",@"value",
                                        nil];


NSDictionary *setUser = [NSDictionary
            dictionaryWithObjectsAndKeys:[@"u" stringByAppendingString:my.id],@"id",
                                        @"GET_USER_INFO",@"command",
                                        @"",@"value",
                                        nil];

 NSLog(@"%@", jsonDataToSendTheServer);

这是我的代码。当我运行上面的代码时，我得到这个印刷品

Here is my code. When I run above code I get this print

<7b226964 223a2275 35383738 37373334 31222c22 636f6d6d 616e6422 3a224745 545f5553 45525f49 4e464f22 2c227661 6c756522 3a22227d>

我不知道我是否可以创建一个json。

I don't have any idea whether I can created a json or not.

我该如何解决这个问题？

How can I fix this?

推荐答案

你错过了这一行来转换它to json

You're missing this line to convert it to json

NSData* jsonData = [NSJSONSerialization dataWithJSONObject:setUser 
                   options:NSJSONWritingPrettyPrinted error:&error];

这是NSJSONSerialization的教程，它可以帮到你：
http://www.raywenderlich.com/5492/working-with-json-in-ios -5

Here's a tutorial on NSJSONSerialization that may help you: http://www.raywenderlich.com/5492/working-with-json-in-ios-5

之后，您可以将NSData转换为NSString进行打印：

After that, you can convert the NSData to an NSString to print:

将UTF-8编码的NSData转换为NSString

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