Json本地解析

- (void)viewDidLoad {
    [super viewDidLoad];

    //1.获取文件的路径
    NSString *jsonFilePath = [[NSBundle mainBundle] pathForResource:@"test.json" ofType:nil];
    //2.读取文件内的数据(NSData类型：一般服务器返回的数据类型是NSData)
    NSData *jsonData = [NSData dataWithContentsOfFile:jsonFilePath];
    //3.JSON解析
    /* 流程：JSON对象转Foundation对象
       使用什么类型的Foundation对象的原则: 最外层是中括号/数组，使用NSArray；最外层是大括号/对象，使用NSDictionary
     */
    NSError *error = nil;
    NSDictionary *dicFromFile = [NSJSONSerialization JSONObjectWithData:jsonData options:NSJSONReadingMutableContainers error:&error];
    //4.取值并验证解析的数据
    /* 取值原则：从外往里一层一层
     */
    NSNumber *feelsLikeC  = dicFromFile[@"FeelsLikeC"];
    NSString *tempC       = dicFromFile[@"TempC"];
    NSArray *requestArray = dicFromFile[@"Request"];
    NSDictionary *cityDic = requestArray[0];
    NSString *cityName    = cityDic[@"city"];
    NSDictionary *locationDic = requestArray[1];
    NSString *locationStr = locationDic[@"location"];
    NSNumber *count = dicFromFile[@"Paging"][@"count"];
    
    NSLog(@"体感温度:%@;天气温度:%@;城市名字:%@;区域名字:%@;页数:%@",feelsLikeC, tempC, cityName, locationStr,count);
}