问题
When focus on my app's textfields, none of them can call out the keyboard, I cannot enter any letter. But before iOS 8 is okay.
I tried to rotate the screen and found that the keyboard is shown out bounds of the screen, checked the view frame, it's 1024 * 768, seems correct.
回答1:
Finally, find that it's simulator's issue, not iOS 8's bug.
Workaround:
iOS Simulator > Hardware > Keyboard > Toggle Software Keyboard
or just press Cmd + K
Yeah, I've connected a hardware keyboard via bluetooth, but didn't notice this keyboard toggle function until now. Seems Xcode 6 will use my hardware keyboard by default.
回答2:
Open Simulator.
Go to Hardware.
Then select Keyboard.
Then choose iOS Users Same Layout As OS X
Simulator -> Hardware -> Keyboard -> iOS Users Same Layout As OS X
来源：https://stackoverflow.com/questions/26012094/keyboard-not-shown-under-ios-8