1.获取文件路径

NSString * jsonPath = [[NSBundle mainBundle] pathForResource:@"Student" ofType:@"json"];

2.将文件内容转化为字符串

NSString * jsonStr = [NSString stringWithContentsOfFile:jsonPath encoding:NSUTF8StringEncoding error:nil];

3.解析,通过JSON将文件字符串转化为数组.
    NSArray * arr =[jsonStr objectFromJSONString];
    
    NSLog(@"%@", arr);