Error The operation couldn’t be completed. (Cocoa error 516.)_the openrating system couldn't的错误处理-优快云博客

本文介绍了一种常见的文件系统错误——尝试创建一个已存在的文件。文章详细解释了Error 516 (NSFileWriteFileExistsError) 的原因，并提供了一个具体的代码示例，展示了如何在复制文件之前检查目标文件是否存在，若存在则先删除，从而避免该错误。

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This is very common error that happens when you try to create a file on the file system and a file with the same name already exists. You can avoid that by checking whether a file with the name already exists or not. If it does exists then remove it and try to create again.

Error 516 is NSFileWriteFileExistsError - You can't move a file to a place where a file already exists.

The below code does not check for this and can lead to above error:

            NSString *docDir = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
            NSString *destSpecFile = [NSString stringWithFormat:@"%@/%@", docDir,gallerySpecFile];

            NSError *err;

            NSString *srcPath = [[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:gallerySpecFile];
            CCLOG(@"Src %@",srcPath);
            CCLOG(@"Descr %@",destSpecFile);

            [[NSFileManager defaultManager] copyItemAtPath:srcPath
                                                    toPath:destSpecFile
                                                     error:&err];