“skip - backup”属性始终返回backup而不是跳过进程

Question

我将此方法用于do not backup，且输出总是成功。但是备份数据也是在ipad中备份的，请帮帮我。

-(BOOL)addSkipBackupAttributeToItemAtURL:(NSURL *)URL
{
const char* filePath = [[URL path] fileSystemRepresentation];
const char* attrName = "com.apple.MobileBackup";
if (&NSURLIsExcludedFromBackupKey == nil) {
    // iOS 5.0.1 and lower
    u_int8_t attrValue = 1;
    int result = setxattr(filePath, attrName, &attrValue, sizeof(attrValue), 0, 0);
    return result == 0;
}
else
{
    // First try and remove the extended attribute if it is present
    int result = getxattr(filePath, attrName, NULL, sizeof(u_int8_t), 0, 0);
    if (result != -1) {
        // The attribute exists, we need to remove it
        int removeResult = removexattr(filePath, attrName, 0);
        if (removeResult == 0) {
            NSLog(@"Removed extended attribute on file %@", URL);
        }
    }
    // Set the new key
    NSError *error = nil;
    [URL setResourceValue:[NSNumber numberWithBool:YES] forKey:NSURLIsExcludedFromBackupKey error:&error];
    return error == nil;
}
}

以上方法我使用.please help me anybody.thanks

Answer 1

我解决了这个问题，.i发现了NSUserdefault错误，这个NSUserdefault存储的数据优先存储在plist文件中，这样NSUserdefault数据就可以删除并解决问题。