Xcode如何NSLog JSON [英] Xcode how to NSLog a JSON

问题描述

是否有任何方法可以使NSLog打印出整个JSON文件.我目前在说

Is there any way to get NSLog to print out an entire JSON file. I am currently saying

NSString *deviceInfo = [NSString stringWithFormat:@"%@ %@",
                        [[UIDevice currentDevice]model], [[UIDevice currentDevice]systemVersion]];
NSDictionary *json = [deviceInfo JSONValue];
NSLog(@"json file = %@", json);

它正在打印出"json文件=(空)"

And it is printing out "json file = (null)"

谢谢 克林顿

推荐答案

我认为您误解了JSON的用途.您传递给-JSONValue的字符串不是有效的JSON字符串，因此返回nil.您也可以自己构建字典:

I think you’re misunderstanding what JSON is for. The string you’re passing to -JSONValue isn’t a valid JSON string, so it’s returning nil. You might as well just construct the dictionary yourself:

UIDevice *device = [UIDevice currentDevice];
NSDictionary *deviceInfo = [NSDictionary dictionaryWithObjectsAndKeys:[device model], @"deviceModel", [device systemVersion], @"deviceSystemVersion", nil];

然后，如果您想要对象的JSON字符串表示形式(例如，用于发送到服务器):

Then if you want the JSON string representation of the object (for sending to your server, for instance):

NSString *jsonDeviceInfo = [deviceInfo JSONRepresentation];

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