即使应用程序在后台，即使设备解锁屏幕，多任务应用程序也可以收到通知吗？

Question

My app needs to perform a calculation every time the device unlocks. It's an app which the user launches intentionally and then enters background, similar like a pasteboard manager.

How can it receive a notification when the device unlocks while the app is in the background? Is this possible? The calculation is not heavy. It just reads and writes a value from/to NSUserDefaults.

Answer 1

使用当前的SDK和公共API，即使您的应用程序在后台，也无法判断用户何时解锁屏幕...