It’s a good idea to keep your iPhone’s software (iOS) up to date. Updates are available for free from Apple. They apply the latest security and bug fixes and features to your iPhone. Here’s how to update your iPhone to the latest version of iOS.
最好使iPhone的软件(iOS)保持最新。 Apple可以免费提供更新。 他们将最新的安全性和错误修复以及功能应用于您的iPhone。 这是将您的iPhone更新到最新版本的iOS的方法。
更新之前先备份 (Back Up Before You Update)
While problems during the installation process are rare, it’s possible that something could go wrong, and cause you to lose your data.
尽管安装过程中的问题很少见，但有可能出问题了，并导致您丢失数据。
So, before you install an iOS update on a mission-critical iPhone (or one with irreplaceable data), make it a habit to perform a backup first.
因此，在关键任务iPhone(或具有不可替代数据的iPhone)上安装iOS更新之前，请先养成执行备份的习惯。
通过设置应用更新iOS (Update iOS via the Settings App)
These days, most people update their iPhone directly on the device without connecting it to a computer. This is called a wireless installation, and here’s how you do it.
如今，大多数人都直接在设备上更新iPhone，而无需将其连接到计算机。 这称为无线安装，这是您的操作方法。
First, launch the “Settings” app (the gear icon). By default, it’s on the first page of the Home screen. Use Apple’s Spotlight Search if you need help locating it.
首先，启动“设置”应用(齿轮图标)。 默认情况下，它位于主屏幕的第一页上。 如果需要查找Apple Spotlight搜索的帮助，请使用它。
In the Settings menu, tap “General.”
在“设置”菜单中，点击“常规”。
Next, tap “Software Update.”
接下来，点击“软件更新”。
You see information about the latest update, including the version number and details about what the update will improve.
您会看到有关最新更新的信息，包括版本号以及有关更新将改进的细节。
If your iPhone hasn’t already downloaded the update, tap “Download and Install” and type your passcode if it’s requested.
如果您的iPhone尚未下载更新，请点按“下载并安装”，然后按要求输入密码。
When the update is finished downloading, a message might pop up asking whether you want to install the update now or later; tap “Install Now.”
更新下载完成后，可能会弹出一条消息，询问您是现在还是以后安装更新。 点击“立即安装”。
After the install process begins, you see a message that says “Verifying Update”; wait for it to finish. After verification is complete, your iPhone’s screen goes black and it will restart.
安装过程开始后，您会看到一条消息，提示“正在验证更新”。 等待它完成。 验证完成后，您的iPhone屏幕变为黑色，然后将重新启动。
You then see the Apple logo and a small progress bar in the center of the screen.
然后，您会在屏幕*看到Apple徽标和一个小的进度条。
When installation is complete, you can unlock and use your iPhone again as usual.
安装完成后，您可以照常解锁并再次使用iPhone。
在Finder或iTunes中更新iOS (Update iOS in Finder or iTunes)
You can also update your iPhone via a wired connection with your Mac or Windows PC. On a Mac running macOS 10.15 or later, open Finder. On a Windows PC or Mac running macOS 10.14 or earlier, open iTunes.
您也可以通过与Mac或Windows PC的有线连接来更新iPhone。 在运行macOS 10.15或更高版本的Mac上，打开Finder。 在运行macOS 10.14或更早版本的Windows PC或Mac上，打开iTunes。
Connect your iPhone to your computer with a Lightning-to-USB cable. If it’s the first time you’ve connected your iPhone to the computer, tap “Trust” in the message that appears asking if you want iPhone to trust the computer.
使用Lightning-to-USB电缆将iPhone连接到计算机。 如果是第一次将iPhone连接到计算机，请在出现的消息中点击“信任”，询问您是否希望iPhone信任计算机。
Locate your iPhone on your computer. In Finder, you see it on the left under “Locations”; click it.
在计算机上找到iPhone。 在Finder中，您会在“位置”下的左侧看到它； 点击它。
In iTunes, look for the small iPhone icon in the toolbar near the top; click it.
在iTunes中，在顶部附近的工具栏中查找iPhone的小图标； 点击它。
In the window that appears with information on your iPhone, navigate to General (in Finder) or Settings > Summary (in iTunes). Click “Check for Update.”
在iPhone上显示的带有信息的窗口中，导航至“常规”(在Finder中)或“设置”>“摘要”(在iTunes中)。 点击“检查更新”。
If an update is available, click “Download,” and after it does, click “Update.” Type your passcode if asked. The update installs, and then you’re ready to go.
如果有可用更新，请单击“下载”，然后单击“更新”。 如果要求输入密码。 安装此更新后，就可以开始使用了。
仔细检查您的iPhone是否为最新 (Double Check That Your iPhone’s Up to Date)
After your handset is done updating, you can check to make sure you have all the most current updates installed.
手机更新完成后，您可以检查以确保安装了所有最新更新。
On your iPhone, navigate to Settings > General > Software Update. If your device is fully updated, you see a screen similar to the one below letting you know your software is up to date.
在您的iPhone上，导航至“设置”>“常规”>“软件更新”。 如果您的设备已完全更新，则会看到与以下屏幕类似的屏幕，通知您软件已更新。
You’re iPhone is now updated and ready to go! Now it’s time to make sure that your iPad is up-to-date.
您的iPhone现在已更新，可以使用了！ 现在是时候确保您的iPad是最新的了 。
翻译自: https://www.howtogeek.com/658451/how-to-update-your-iphone-to-the-latest-ios-version/