锁屏iPhone
我的问题很简单（我认为并希望）。我想知道当我锁定手机时会发生什么。 我制作了一个类似时钟的小应用程序，它应该在给定时刻（假设 18:00）播放并循环播放声音。但是当我按下电源按钮并且手机锁定时，在 18:00 没有任何反应。当我在 18:05 再次按下电源按钮并显示“锁定屏幕”时，然后播放声音。
请注意，在锁定手机之前我没有返回主屏幕。当我解锁应用程序时，该应用程序仍然打开。 即使我锁定了屏幕，是否有某种方法可以让应用程序仍然执行其操作？或者这只是我可能犯的一个编程错误？
问候， 保罗·皮伦
My question is quite simple (I think and hope). I would like to know what happens when I lock my phone.
I made a little clock-like app which should play and loop a sound at a given moment (lets say 18:00). But when I press the power button, and the phone locks, nothing happens at 18:00. When I press the power button again 18:05 and the "lock screen" shows, then the sound is played.
Please note, I didn't return to the home screen before locking the phone. The app is still open, when I unlock the app is shown.
Is there some way to let the app still do its thing eventhough I locked the screen? Or is this just a programming error I might have made?
Regards,
Paul Peelen
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您应该查看有关应用程序委托的 applicationWillResignActive: 和 applicationDidBecomeActive: 方法的信息。您可以在 iPhone 应用程序编程指南中找到此信息。另外，请查看同一指南中有关“自动睡眠定时器”的信息。
http://developer.apple.com/iphone/library/documentation/iPhone/Conceptual/iPhoneOSProgrammingGuide/ApplicationEnvironment/ApplicationEnvironment.html#//apple_ref/doc/uid/TP40007072-CH7-SW59
我认为您可以使用此信息回答您自己的大部分问题，但请发布您可能有的任何后续问题。
巴特
You should take a look at information about the application delegate’s applicationWillResignActive: and applicationDidBecomeActive: methods. You can find this information in the iPhone Application Programming Guide. Also, take a look at information about "The Automatic Sleep Timer" in the same guide.
http://developer.apple.com/iphone/library/documentation/iPhone/Conceptual/iPhoneOSProgrammingGuide/ApplicationEnvironment/ApplicationEnvironment.html#//apple_ref/doc/uid/TP40007072-CH7-SW59
I think you can answer most of your own questions with this information but please post any follow up questions that you might have.
Bart