Json 转换

1字典转JSON字符串

 

//NSDictionary转换为Data

    NSData* jsonData = [NSJSONSerialization dataWithJSONObject:dic options:NSJSONWritingPrettyPrinted error:nil];

    

    //Data转换为JSON

    NSString* str = [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding];