故障排除。
Changes sync between devices slowly.
Data appear on one device but not another.
We do not support iCloud issues due to limited visibility
We've found that the following steps address most iCloud sync issues, make sure you have a backup before start.
Ensure that you're using the same iCloud account on all devices.
Go to Settings > iCloud and verify that the email displayed is the same on all of your devices.
If your iPhone isn't connected to the Internet through Wifi, see if iCloud Drive has permission to use cellular data.
iOS 10.2 and earlier:
Go to Settings > iCloud > iCloud Drive, scroll to the bottom of the screen, and see if the toggle next to "Use Cellular Data" is enabled.
iOS 10.3 and later:
Go to Settings > Cellular, scroll to the bottom of the screen, and see if the toggle next to "iCloud Drive" is enabled.
If your iCloud account is low on storage space, iCloud may have trouble making all of your data accessible. In that case, increasing your available storage space may resolve the issue.
You can check how much storage space is available in your iCloud account like so:
go to Settings > iCloud and check the value listed on the Storage button.
If your device is low on storage space, iCloud may not be able to make your notes accessible while you are not connected to the internet. In that case, freeing up storage space on your iPad may resolve the issue.
You can check how much storage space is available on your devices like so:
go to Settings > General > Storage & iCloud Usage.
为了延长电池续航时间，低电量模式会禁用设备上的 iCloud 同步。如果您的设备电池电量不足，请为设备充电，直到其退出低电量模式。
Restarting your devices often addresses iCloud sync issues.
前往 “应用程序” > “设置” > “高级”。关闭 iCloud，在应用程序内关闭 iCloud，退出应用程序，重启设备，然后重新打开 iCloud。
Turn off/on iCloud Drive on all devices that are using the app, then turn it on again. Only try this option if the ideas above have not helped, we are not responsible for data lost.