New to iOS - Need help to prevent app from dimming screen/going to sleep

Question

Created Jul ’22

Replies 3

Boosts 0

Participants 3

Hi, I'd greatly appreciate any help with this problem. I have developed an app for both iOS and android. The app is built with Kivy and Python, it functions as expected however in Xcode I cannot find a way to prevent the phone/device from dimming and locking.

I'm very new to Xcode and iOS, but I ave tried several variations of.

[UIApplication sharedApplication].idleTimerDisabled = YES;

in multiple areas of the m Main but I cannot get it to work, no matter what I try the phone still goes to sleep/locks.

If that code above is supposed to work, I have no idea where to put it. As far as I can tell, the only places I could enter something like that is in the main.m, bridge.m and bridge.h code; or somewhere in the info.plist

I'm currently lost, feels like a simple problem.

Answered by Wormi in 720442022

took me forever but I hope this helps someone else.

For Kivy-iOS, this needs to be entered into the main.m file in Xcode, at the bottom of the main() function.

int main(int argc, char *argv[]) {
    int ret = 0;

that's the start of main()

then all the main code, with the following code near the bottom.


    // If other modules are using the thread, we need to initialize them before.
    PyEval_InitThreads();

    // Add an importer for builtin modules
    load_custom_builtin_importer();

then, You need to put the below code after that

    // Prevent sleep
        [NSTimer scheduledTimerWithTimeInterval:2.0 repeats:YES block: ^(NSTimer * _Nonnull timer) {
            [UIApplication sharedApplication].idleTimerDisabled = NO;
            [UIApplication sharedApplication].idleTimerDisabled = YES;
            NSLog(@"idle timer");
        }];

        NSLog(@"Initializing python");
    Py_Initialize();

hope this helps someone else.

Boost

Answer 1

endecotp OP

Jul ’22

I suspect that putting the code in main.m is too early. It wants to access the "shared UIApplication" but in main() that hasn't been created yet. Maybe.

I think you probably need to ask the Kivy people about how to do this. There must be some way of calling arbitrary objC or Swift code from slightly later on.

0

Answer 2

Claude31 OP

Jul ’22

In Swift, that should be called in appDidFinishLaunching.

UIApplication.shared.isIdleTimerDisabled = true

I don't know what's the equivalent in Kivy.

0

Answer 3

Wormi OP

Jul ’22

Accepted Answer

took me forever but I hope this helps someone else.

For Kivy-iOS, this needs to be entered into the main.m file in Xcode, at the bottom of the main() function.

int main(int argc, char *argv[]) {
    int ret = 0;

that's the start of main()

then all the main code, with the following code near the bottom.


    // If other modules are using the thread, we need to initialize them before.
    PyEval_InitThreads();

    // Add an importer for builtin modules
    load_custom_builtin_importer();

then, You need to put the below code after that

    // Prevent sleep
        [NSTimer scheduledTimerWithTimeInterval:2.0 repeats:YES block: ^(NSTimer * _Nonnull timer) {
            [UIApplication sharedApplication].idleTimerDisabled = NO;
            [UIApplication sharedApplication].idleTimerDisabled = YES;
            NSLog(@"idle timer");
        }];

        NSLog(@"Initializing python");
    Py_Initialize();

hope this helps someone else.

0