How to get key pressing in scene module?

[yaley]

Hi, i am a newbie and i have a problem.
In my project, cannot detect am i pressing the key, if use ui.View.get_key_commands() and ui.View.key_command, it can only detect the keypress, not keydown

So how???

[yaley]

@JonB @cvp thanks for your helping and I will never forget your helpings

[yaley]

@JonB do you have your ios device now?

[yaley]

@cvp @JonB
Finally!!!
i run this code with SUCCESS!
thank you for your helpings!

from objc_util import *
import ui

UIViewController = ObjCClass('UIViewController')


# Some callback definitions used by create_objc_class
def CustomViewController_pressesBegan_withEvent_(_self, _cmd, _presses, _event):
    print('pressesBegan_withEvent')
    presses = ObjCInstance(_presses)


# The main class...
class MyView(ui.View):
    def __init__(self):
        super().__init__(self)
        self.background_color = 'gray'

    @on_main_thread
    def init(self):
        v = ui.View()
        v.frame = self.frame
        tf = ui.TextField()
        tf.frame = (10, 10, 200, 32)
        v.add_subview(tf)
        vo = ObjCInstance(v)
        #print(vo)
        #print(dir(vo))

        # set up the custom view controller
        methods = [CustomViewController_pressesBegan_withEvent_]
        protocols = []
        CustomViewController = create_objc_class(
            'CustomViewController',
            UIViewController,
            methods=methods,
            protocols=protocols)
        cvc = CustomViewController.alloc().init()
        cvc.view = vo

        # internal scheming...
        self_objc = ObjCInstance(self)
        self_objc.nextResponder().addChildViewController_(cvc)
        self_objc.addSubview_(vo)
        cvc.didMoveToParentViewController_(self_objc)

        tf.begin_editing()

if __name__ == '__main__':
    v = MyView()
    v.present('fullscreen')
    v.init()

[JonB]

I was wondering if the issue was lack of focus. Some documentation says the view must be in the responder chain of the focused view. It might be possible to do without the textfield, if we create a custom view that implements canBecomeFocused(), though I'm not sure how to then force it to take focus.
By having a textview, I guess that's taken care of, although I'm a little surprised that the textview doesn't eat the event itself.

[cvp]

@yaley 👏

[yaley]

@cvp @JonB Again thank you for helping me a lot :D i was a python coder before, and i started learn js, nodejs, html for web development. But after my friend introduced Pythonista to me, i started to code python again, but i was using pygame module before (xD) and i was puzzled when using scene module, but now, it’s not, but ofc questions cannot be avoided, so i asked you @JonB and @cvp you both helped me a lot!

( lastly, i want to tell you that i am 10 years old, i think you are confused and amazed, XD )

[cvp]

@yaley said

i am 10 years old

I'am 70 and at 10, I only was playing with Lego, you're an happy guy to have such tools 😂

[cvp]

@yaley said

i was a python coder before

as you are only 10 years old, when you say "before", do you mean in another life? Reincarnation? 😂

[cvp]

@JonB said

I'm a little surprised that the textview doesn't eat the event itself.

Is an ui.TextField an UIViewController? Because the called method is only for such an object