禁用iCloud同步 [英] Disable iCloud sync

问题描述

有没有办法阻止您的应用程序数据（文档文件夹内容）同步到iCloud？ （其他然后将其存储在Caches目录中，因为iOS5中的新问题与相关）我的应用程序需要在设备上存储数据，但出于安全原因，它无法与任何第三方（包括Apple）同步。

Is there a way to prevent your application data (Documents folder contents) from being synced to iCloud? (other then storing it in Caches directory because of the new issues in iOS5 with doing that) My Application has need of storing data on the device, but for security reasons it can't be synchronized to any 3rd party (including Apple).

推荐答案

来自：https://developer.apple.com/library/ios/#qa/qa1719/_index.html

您可以使用以下方法设置不备份扩展属性。每当您创建一个不应备份的文件或文件夹时，请将数据写入文件，然后调用此方法，并将URL传递给该文件。

You can use the following method to set the "do not back up" extended attribute. Whenever you create a file or folder that should not be backed up, write the data to the file and then call this method, passing in a URL to the file.

#include <sys/xattr.h>
- (BOOL)addSkipBackupAttributeToItemAtURL:(NSURL *)URL
{
    const char* filePath = [[URL path] fileSystemRepresentation];

    const char* attrName = "com.apple.MobileBackup";
    u_int8_t attrValue = 1;

    int result = setxattr(filePath, attrName, &attrValue, sizeof(attrValue), 0, 0);
    return result == 0;
}

可以找到更多信息： https://developer.apple.com/icloud/documentation/data-storage/

这篇关于禁用iCloud同步的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！