如何在iOS/macOS系统中创建文件时创建唯一的文件名

　由孙亚洲发布于 2017-04-20 2017-04-20T16:35:42+00:00

最后更新: 2023-04-02 2023-04-02T08:42:51+00:00

前言

当我无数次看到大家写代码的时候总是以一个时间戳+arc4random()创建某文件的时候深感心碎,难道操作系统就没有提供相关的函数么于是我找到了如下代码解决大家因为创建文件重名问题.

/* Create a recording file */
    NSString *filePath = [@"~/Movies/AVScreenShackRecording_XXXXXX" stringByStandardizingPath];
    char *screenRecordingFileName = strdup([filePath fileSystemRepresentation]);
    if (screenRecordingFileName)
    {
        int fileDescriptor = mkstemp(screenRecordingFileName);
        if (fileDescriptor != -1)
        {
            NSString *filenameStr = [[NSFileManager defaultManager] stringWithFileSystemRepresentation:screenRecordingFileName length:strlen(screenRecordingFileName)];
            
            NSLog(@"唯一的文件名:%@",filenameStr);
            
        }
        remove(screenRecordingFileName);
        free(screenRecordingFileName);
    }