把txt文件中的json字符串写到plist文件中

- (void)json2Plist
{
    NSString *filePath = [self applicationDocumentsDirectoryFileName:@"json"];
    NSMutableArray *tempArray = [[NSMutableArray alloc] initWithContentsOfFile:filePath];
    
    //第一次添加数据时,数组为空
    if (tempArray.count == 0) {
        tempArray = [NSMutableArray array];
    }
    
　　//文件名(utf-8编码)
    NSString *path = [[NSBundle mainBundle] pathForResource:@"city2" ofType:@"txt"];
    NSString *contents = [[NSString alloc] initWithContentsOfFile:path encoding:NSUTF8StringEncoding error:nil];
    NSArray  *list = [contents componentsSeparatedByString:@","];
    
    for (NSString *tempStr in list) {
        NSDictionary *dict = [tempStr propertyListFromStringsFileFormat];
        [tempArray addObject:dict];
    }
 
    BOOL success = [tempArray writeToFile:filePath atomically:YES];
    NSLog(@"success:%d",success);
}

#pragma mark - 获取沙盒中的Plist文件路径
- (NSString *)applicationDocumentsDirectoryFileName:(NSString *)fileName
{
    NSString *filePath;
    //沙盒中的Document文件夹
    NSString *documentDirectory = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject];
  
    //获取传来的Plist文件名
    NSString *fileNameStr = [NSString stringWithFormat:@"%@.plist",fileName];
    filePath = [documentDirectory stringByAppendingPathComponent:fileNameStr];
    return filePath;
}

//txt文本格式示例:
{id = 110000;contents = "北京市";},{id = 120000;contents = "天津市";},{id = 130100;contents = "石家庄市";},{id = 654300;contents = "阿勒泰地区";}