Excel文件转plist文件出现的文件编码问题

  
    NSString *alarmPath = [[NSBundle mainBundle] pathForResource:@"GSK980M" ofType:@"txt"];
//    NSLog(@"%@",alarmPath);
//    尝试更换文件编码，失败
//    NSStringEncoding gbk = CFStringConvertEncodingToNSStringEncoding(kCFStringEncodingGB_18030_2000);
    NSString *alarmContent = [[NSString alloc] initWithContentsOfFile:alarmPath encoding:NSUTF8StringEncoding error:nil];
//    NSLog(@"%@",alarmContent);
    
    NSArray *alarmArray = [alarmContent componentsSeparatedByCharactersInSet:[NSCharacterSet newlineCharacterSet]];
//    NSLog(@"%@",alarmArray);
    NSString *docuPath = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents"];
    NSString *plistPath = [docuPath stringByAppendingPathComponent:@"GSK980M.plist"];
    NSLog(@"%@",plistPath);
    NSMutableArray *resultsArr = [NSMutableArray array];
    for (NSInteger j = 0; j < alarmArray.count; j++){
        NSString *alarmStr = [alarmArray objectAtIndex:j];
//        NSLog(@"%@",alarmStr);
        NSArray *alarmArr = [alarmStr componentsSeparatedByString:@";"];
        [resultsArr addObject:@{@"alarmID":[alarmArr objectAtIndex:0],@"alarmType":[alarmArr objectAtIndex:1],@"alarm":[alarmArr objectAtIndex:2],@"clearType":[alarmArr objectAtIndex:3],@"alarmContent":[alarmArr objectAtIndex:4]}];
    }
    [resultsArr writeToFile:plistPath atomically:YES];