问题
Speaking of mobile devices, whats the difference between those two methods? If I press the home key both are called. Is there any situation when one is called and not the other?
回答1:
Since this UnityAnswer is one of the first (if not the first) to be returned on a search for OnApplicationFocus/Pause & iOS, an important update in Unity 4.6.1 has changed the behavior for iOS.
As of 4.6.1, both OnApplicationFocus and OnApplicationPause will be called in iOS.
The order is :
App initially starts:
OnApplicationFocus(true) is called
App is soft closed:
OnApplicationFocus(false) is called
OnApplicationPause(true) is called
App is brought forward after soft closing:
OnApplicationPause(false) is called
OnApplicationFocus(true) is called
Hope that helps
http://answers.unity.com/answers/970958/view.html
来源：https://stackoverflow.com/questions/31559629/whats-the-difference-between-onapplicationfocus-and-onapplicationpause