如何在Cocoa中安全地写入给定的文件路径,必要时添加数字后缀？

- (NSString *)uniquePathForPath:(NSString *)path {
    NSFileManager *fileManager = [NSFileManager defaultManager];
    NSString *uniquePath = path;
    NSInteger suffix = 1;
    
    while ([fileManager fileExistsAtPath:uniquePath]) {
        NSString *pathWithoutExtension = [uniquePath stringByDeletingPathExtension];
        NSString *extension = [uniquePath pathExtension];
        uniquePath = [NSString stringWithFormat:@"%@-%d.%@", pathWithoutExtension, suffix, extension];
        suffix++;
    }
    
    return uniquePath;
}