針對iOS 4.0應用程序的NSFileProtectionComplete

Question

我看到了有關NSFileProtectionComplete的WWDC 2010視頻並保護了應用程序的數據。

有沒有什麼例子呢？是否有人有示例代碼分享？

Answer 1

見的NSFileManager類文檔：

The file is stored in an encrypted format on disk and cannot be read from or written to while the device is locked or booting.

它基本上文件庫爲單個文件。您只需在設置文件屬性時傳遞常量。

To mark a file as protected, you must add an extended attribute to it. The Foundation framework includes two ways to add this attribute:

When writing the contents of an NSData object to disk using the writeToFile:options:error: method, include the NSDataWritingFileProtectionComplete option.

Use the setAttributes:ofItemAtPath:error: method of NSFileManager to add the NSFileProtectionKey attribute (with the NSFileProtectionComplete value) to an existing file

。

http://developer.apple.com/iphone/library/documentation/iPhone/Conceptual/iPhoneOSProgrammingGuide/StandardBehaviors/StandardBehaviors.html