如何将数据附加到NSKeyedArchive? [英] How to append data to NSKeyedArchive?

问题描述

我正在读取这样的文件:

I'm reading a file like so:

NSData *data = [NSData dataWithContentsOfFile:myPath];

NSKeyedUnarchiver *unarchiver = [[NSKeyedUnarchiver alloc] initForReadingWithData:data];


NSData *imgData = [unarchiver decodeObjectForKey:@"myimage"];

if (imgData != nil) {
    self.image = [[NSImage alloc]initWithData:imgData];
}else{
    self.image = nil;
}

[unarchiver finishDecoding];
[unarchiver release];

我想做的是将键@"myimage"的图像数据附加到同一文件(如果不存在).

What I'd like to do is to append image data for key @"myimage" to the same file if it doesn't exist.

如何处理?

推荐答案

似乎没有办法附加"到NSKeyedArchive，因此我只是在添加了额外数据的情况下重新创建了它，并覆盖了原始文件.

It seems that there's no way to "append" to NSKeyedArchive, so I just re-created it with the extra data added and have written over the original file.

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