这个后台应用通知的名称是什么？
What is the name of this background app notice?
如果我在 iOS 8 上启动语音备忘录，然后转到另一个应用程序（例如 Notes），屏幕顶部会出现红色通知（见下文，"Recording 00:16"）。
这条通知的名称是什么？相关 iOS 文档在哪里？
你说的是双高状态栏，这是因为当其他应用程序在后台录制音频、获取背景位置等时，双高状态栏提示用户该应用正在使用该资源。
您可以找到相关文档here
Make sure your UI can handle the double-high status bar. The
double-high status bar appears during events such as in-progress phone
calls, audio recording, and tethering. In unprepared apps the extra
height of this bar can cause layout problems. For example, the UI can
become pushed down or covered. In a multitasking environment, it’s
especially important to be able to handle the double-high status bar
properly because there are likely to be more apps that can cause it to
appear.
如果我在 iOS 8 上启动语音备忘录，然后转到另一个应用程序（例如 Notes），屏幕顶部会出现红色通知（见下文，"Recording 00:16"）。
这条通知的名称是什么？相关 iOS 文档在哪里？
你说的是双高状态栏，这是因为当其他应用程序在后台录制音频、获取背景位置等时，双高状态栏提示用户该应用正在使用该资源。
您可以找到相关文档here
Make sure your UI can handle the double-high status bar. The double-high status bar appears during events such as in-progress phone calls, audio recording, and tethering. In unprepared apps the extra height of this bar can cause layout problems. For example, the UI can become pushed down or covered. In a multitasking environment, it’s especially important to be able to handle the double-high status bar properly because there are likely to be more apps that can cause it to appear.