使用UIDeviceOrientation更改通知而不是viewillTransistionToSize

Question

I have managed to support Portrait and Landscape orientations for my app.

However, my implementation is based on UIDeviceOrientationChangeNotification . I do not use viewillTransistionToSize

Offical Apple sample code for AlternateViews does use notification based approach. So I assumed it should be fine.

• Is there any significant advantage/disadvantage of using one over another?
• Would it ever happen that my app will not get deviceOrientationChangenotification ?

Please clarify.

Answer 1

I am using a combination of both. But to me it looks like viewillTransistionToSize gives more control as you can execute code

• before rotation begins
• during rotation
• after rotation

while in case of Notification you only execute code after rotation.

Not sure but I found this thru experimentation and not thru docs.