在iOS應用程序中,如何檢測到用戶已按下外部鍵盤上的箭頭鍵之一? [英]Within an iOS app how do I detect that the user has pressed one of the arrow keys on their external keyboard?
處理外部鍵盤按鍵而不在 iOS 應用程序的屏幕上顯示鍵盤 [英]Handling external keyboard presses without showing keyboard on screen on iOS app