NSString *str = [[NSBundlemainBundle]pathForResource:@"sys_Area.json"ofType:nil];

NSData *data = [NSDatadataWithContentsOfFile:str];

NSArray *array = [NSJSONSerializationJSONObjectWithData:dataoptions:0error:NULL];

    if( [array isKindOfClass:[NSArray class]])

    {

        [array writeToFile

    }

NSString *path =@"/Users/zhoupengju/Desktop/sys_Type.json";

NSArray *array = [NSJSONSerializationJSONObjectWithData:[NSDatadataWithContentsOfFile:path] options:NSJSONReadingMutableLeaveserror:nil];

    [array writeToFile:@"/Users/zhoupengju/Desktop/sys_Type.plist"atomically

if( [json_data isKindOfClass:[NSArray class]])         { 
            NSLog(@"这是一个数组%@", json_data);  
            //把json转化戕plist             NSArray * arr = json_data; 
            [arr writeToFile:@"/Users/qianfeng/Documents/json.plist" atomically:YES];         } 
        else if([json_data isKindOfClass:[NSDictionary class]])         { 
            NSLog(@"这是一个字典%@", json_data);              
            NSDictionary * dic = json_data; 
            [dic writeToFile:@"/Users/qianfeng/Documents/json.plist" atomically:YES];