当第一批 iOS 设备推出时，人们期望客户也会拥有一台个人电脑，例如Windows PC 或MacOS机器。iPhone 的情况可能不太正确，但早期的 iPad 用户如果不先将机器连接到 PC，甚至无法开始使用他们的平板电脑。
如今，iPad 和 iPhone 是完全独立的设备。事实上，在一定程度上，它们是为了在日常任务中取代其他类型的计算机。任何拥有现代 iOS 设备的人都会费心将其连接到计算机上，这是值得怀疑的。
然而，您想要这样做是有充分理由的。它使您可以将设备备份到计算机。当然，iCloud很棒，但Apple只提供 5 GB 的免费 iCloud 存储空间，大多数人不想支付额外费用。
因此，免费在本地备份您的设备是一个不错的选择。这值得每天将您的设备连接到计算机的麻烦吗？也许不是，但也没有必要！
最新版本的 iOS 和iTunes允许您使用 iTunes 无线备份您的 iOS 设备。只要两个设备都在同一个WiFi网络上。这是它是如何完成的。
在 iTunes 中设置 WiFi 备份
在我们开始之前，您应该注意您不能自动进行本地 iTunes 备份和 iCloud 备份。您需要为自动备份选择一个或另一个。无论您是通过有线还是WiFi进行备份，都是如此。
您仍然可以备份到 iCloud 并手动创建本地备份，但它需要您使用电缆将设备连接到计算机并按下手动备份和恢复下的(Manually Backup and Restore)立即( Back Up Now)备份按钮。
要执行这些步骤，我们假设您已经在您的计算机上安装并设置了 iTunes。
第一步当然是使用电缆将设备连接到计算机。(connect your device to your computer with a cable.)您的 iOS 设备应该已解锁。可能会询问您是否信任计算机或确认某些事情。同意(Agree)并酌情确认。
现在您已将 iOS 设备连接到 iTunes，菜单栏下方应该会出现一个小设备图标。单击设备图标。(Click the device icon.)
现在在边栏中，确保选择摘要。( Summary.)
完成后，您应该会看到这些设置。
如上图所示，选择此计算机(This Computer)作为备份目标。如果您还想加密它，这是您的选择。如果这样做，请确保您不会忘记密码。
现在，在“选项”下选择通过 Wi-Fi 与此 iPad 同步。( Sync with this iPad over Wi-Fi. )这将确保您的备份（和整个同步）将通过WiFi进行。请务必单击完成 (Done )以保存您的更改。
让 WiFi 备份工作
您已准备好通过本地WiFi同步和备份您的 iOS 设备，但要使其正常工作，必须满足几个条件：
- 两台设备必须在同一个WiFi网络上
- iTunes 必须在计算机上打开
- iOS 设备必须正在充电
这意味着运行备份的理想时间是当您上床睡觉(go to bed)并为您的设备充电过夜时。当然，您可以随时通过WiFi手动启动同步。
只需(Simply)像插入 iTunes 一样从 iTunes 启动同步。然后在后台进行备份时，您可以像往常一样继续使用您的 iOS 设备。无需电线！享受！
Backup Your iOS Device Over WiFi Automatically
When the first iOS devices launched, there was an expectation that cuѕtomеrs would also have a persоnal computer like a Windows PC or MacOS machine. It might have been less true of the iPhone, but early iPad users couldn’t even start υsing their tablets without first connecting the machine to a PC.
These days, iPads and iPhones are completely independent devices. In fact, to a certain extent, they are meant to replace other sorts of computers in day-to-day tasks. It’s doubtful that anyone who owns a modern iOS device bothers to actually hook it up to a computer anymore.
Yet, there’s one good reason why you would want to. It lets you backup your device to your computer. Sure, iCloud is great, but Apple only gives 5 GB of free iCloud storage and most people don’t want to pay extra.
So, backing up your device locally for free is a good alternative. Is this worth the hassle of tethering your device to a computer every day? Perhaps not, but it’s also not necessary!
The latest versions of iOS and iTunes allow you to backup your iOS device with iTunes wirelessly. Just as long as both devices are on the same WiFi network. Here’s how it’s done.
Setting Up WiFi Backup in Itunes
Before we get started, you should note that you cannot automatically make a local iTunes backup and an iCloud backup. You’ll need to choose one or the other for automatic backups. This is true whether you make a backup over a wire or WiFi.
You can still backup to iCloud and create local backups manually, but it requires you to connect your device to the computer using a cable and pressing the Back Up Now button under Manually Backup and Restore.
To follow these steps, we assume that you already have iTunes installed and set up on your computer.
The first step is of course to connect your device to your computer with a cable. Your iOS device should be unlocked. You may be asked whether to trust the computer or to confirm some things. Agree and confirm as appropriate.
Now that you have the iOS device connected to iTunes, a small device icon should appear just below the menu bar. Click the device icon.
Now in the sidebar, make sure to select Summary.
Having done so, you should see these settings.
As illustrated above, choose This Computer as your backup destination. It’s your choice if you also want to encrypt it. If you do, just make sure you don’t forget the password.
Now, under “Options” choose Sync with this iPad over Wi-Fi. That will ensure your backups (and entire sync) will happen over WiFi. Be sure to click Done to save your changes.
Getting WiFi Backup to Work
You’re all set to sync and backup your iOS device over local WiFi, but for it to work several conditions must be met:
- Both devices must be on the same WiFi network
- Itunes must be open on the computer
- The iOS device must be charging
This means the ideal time to run the backup is when you go to bed and put your device on charge for the night. Of course, you can manually start a sync any time you want over WiFi.
Simply initiate the sync from iTunes as you would if it were plugged in. You can then keep using your iOS device as usual while a backup happens in the background. No wires needed! Enjoy!
