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请教如何hook枚举器

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@gemo wrote:

以下代码,可以列出指定目录下的文件:

NSDirectoryEnumerator *direnum = [[NSFileManager defaultManager] enumeratorAtPath:@"/xxx/"];
NSString *filename;
while ((filename = [direnum nextObject] )) {
    NSLog(@"%@", filename);
}

现在想通过hook隐藏特定的文件,试过对NSEnumerator的nextObject方法进行hook,发现没有效果,求高手指点怎么写这个hook

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