- (IBAction)jsonSystemButtonDidClicked:(UIButton *)sender {

    self.JSONArray = [NSMutableArray array];

    // 1、拿到 json 文件的路径

    NSString *path = [[NSBundle mainBundle] pathForResource:@"student" ofType:@"json"];

    // 2、依据路径获取文件内容为 NSData 对象

    NSData *data = [NSData dataWithContentsOfFile:path];

    // 3、解析開始

    NSArray *array = [NSJSONSerialization JSONObjectWithData:data options:(NSJSONReadingMutableContainers) error:nil];

    for (NSDictionary *dict in array) {

        StudentModal *modal = [StudentModal new];

        [modal setValuesForKeysWithDictionary:dict];

        [self.JSONArray addObject:modal];

    }

    for (StudentModal *modal in self.JSONArray) {

        NSLog(@"JSONArray = %@, %ld, %@", modal.name, modal.number, modal.hobby);

    }

}

@property (nonatomic, strong) NSMutableArray *JSONArray;

当模型中类型冲突时

@implementation StudentModal

- (NSString *)description

{

    return [NSString stringWithFormat:@"%@, %@, %@, %ld, %@", self.name, self.sex,self.phoneNumber, self.number, self.hobby

            ];

}

- (void)setValue:(id)value forKey:(NSString *)key

{

    // super 必须写

    [super setValue:value forKey:key];

    if ([key isEqualToString:@"number"]) {

        self.number = [value integerValue];

    }

}