Читать книгу iPad and iPad Pro For Dummies - Paul McFedries - Страница 23

The status bar, which is at the top of the screen, displays tiny icons that provide a variety of information about the current state of your iPad:

  Airplane mode: Airplane mode should be enabled when you fly. It turns off all wireless features of your iPad — the cellular, 5G, 4G, LTE, 3G, GPRS, and EDGE networks; Wi-Fi; and Bluetooth — so you can enjoy music, video, games, photos, or any app that doesn’t require an internet connection while you’re in the air.Tap the Settings app and then tap the airplane mode switch on (so green is displayed). The icon shown in the margin appears on the left side of your status bar when airplane mode is enabled. You can also pull Control Center down from the top-right corner and tap the airplane mode icon to turn airplane mode on (the icon turns orange). Disable airplane mode when the plane is at the gate before takeoff or after landing so you can send or receive email and iMessages.To use Wi-Fi in flight with a cellular iPad, first enable airplane mode and then reenable Wi-Fi.

  Wi-Fi: If you see the Wi-Fi icon, your iPad is connected to a Wi-Fi network. The more semicircular lines that are lit (up to three), the stronger the Wi-Fi signal. If your iPad has only one or two semicircles of Wi-Fi strength, try moving around a bit. If you don’t see the Wi-Fi icon on the status bar, internet access with Wi-Fi is not currently available.

  Personal Hotspot: You see this icon when you’re sharing your internet connection with computers or other devices over Wi-Fi, USB, or Bluetooth. Personal Hotspot is available for every cellular-enabled iPad but may not be available in all areas or from all carriers. Additional fees may apply. Contact your wireless carrier for more information.

  Syncing: This icon appears on the status bar when your iPad is syncing with iTunes on your Mac or PC.

  Activity: This icon tells you that some network or other activity is occurring, such as over-the-air synchronization, the sending or receiving of email, or the loading of a web page. Some third-party apps use this icon to indicate network or other activity.

  VPN: This icon shows that you’re currently connected to a virtual private network (VPN).

  Lock: This icon tells you when your iPad is locked. See Chapter 2 for information on locking and unlocking your iPad.

  Screen orientation lock: This icon appears when the screen orientation lock is engaged.

  Location Services: This icon appears when an app (such as Maps; see Chapter 13 for more about the Maps app) is using Location Services (such as GPS) to establish the location of your iPad.

  Do not disturb: This icon appears whenever do not disturb is enabled, silencing incoming FaceTime calls and alerts. See Chapter 14 for details on do not disturb.

  Play: This icon informs you that a song is currently playing. You find out more about playing songs in Chapter 7.

  Bluetooth: This icon indicates the current state of your iPad’s Bluetooth connection. If you see this icon on the status bar, Bluetooth is on and a device (such as a wireless headset or keyboard) is connected. If the icon is gray, Bluetooth is turned on but no device is connected. If the icon is white, Bluetooth is on and one (or more) devices are connected. If you don’t see a Bluetooth icon, Bluetooth is turned off. Chapter 14 goes into more detail about Bluetooth.COMPARING WI-FI AND CELLULAR NETWORKSWireless carriers offer several data networks relevant to the iPad, all of which can take advantage of the speediest 4G or LTE networks. AT&T has a form of LTE the company misleadingly calls 5G. 3G is slower than 4G and LTE, and EDGE and GPRS are slower still. Your iPad starts by trying to connect to the fastest network it supports. If it makes a connection, you see the appropriate cellular icon on the status bar.Most Wi-Fi networks, however, are faster than even the fastest 4G cellular network. So, because all iPads can connect to a Wi-Fi network if one is available, they do so, even when a cellular network is also available.Last but not least, if you don’t see 5G, 4G, LTE, 3G, GPRS, E (for EDGE), or the Wi-Fi icon, you don’t currently have internet access.

  Bluetooth battery: This icon displays the battery level of supported Bluetooth devices (while connected). Only certain devices — mostly headsets and speakers — support this feature. If you see this icon in your status bar, it’s telling you the approximate battery level of whichever supported device is currently connected with your iPad.

  Battery: This icon shows the level of your battery’s charge and also indicates when your device is connected to a power source. It’s completely filled when your device isn’t connected to a power source and is fully charged. It then empties as the battery becomes depleted. You see an on-screen message when the charge drops to 20 percent or below, and another when it reaches 10 percent.