问题
Is there any way anyone knows of to force the onscreen software keyboard in iOS when a Bluetooth HID device (like a barcode scanner) is active?
There are a few ancient questions on SO, but most work by manually adjusting the frame of the keyboard view, and that method no longer appears to work as of iOS 8.
Strangely there doesn't seem to be any information on how to do this post iOS 8. Is it just impossible?
See:
Show iPhone soft keyboard even though a hardware keyboard is connected
Force on screen keyboard to show when bluetooth keyboard connected
Default keyboard is not coming when Barcode Scanner Device is Connected by Bluetooth in IOS
Bluetooth HID Device & iOS textFields
Show virtual Keyboard when bluetooth keyboard connected?
来源：https://stackoverflow.com/questions/44467082/force-software-keyboard-on-ios-10