iOS 字典中取字典，字典中取数组，字典中取字符串，字典套字典中取字典，字典套字典中取数组，字典套字典中取字符串

    //字典中取字典
    NSDictionary  *result1 = [dic objectForKey:@"result"];
    //字典中取数组
    NSArray *arrlist1 = [dic objectForKey:@"arr"];
    //字典中取字符串
    NSString *str1 = [dic objectForKey:@"string"];
    
    //字典套字典中取字典
    NSDictionary  *result2 = [[dic objectForKey:@"list"] objectForKey:@"result"];
    //字典套字典中取数组
    NSArray *arrlist2 = [[dic objectForKey:@"list"] objectForKey:@"arr"];
    //字典套字典中取字符串
    NSString *str2 = [[dic objectForKey:@"list"] objectForKey:@"string"];