This solution had been working for me:
https://stackoverflow.com/questions/50737943/how-to-change-volume-programmatically-on-ios-11-4/50740074#50740074
But it seems that I can't get away with an MPVolumeView anymore. However the
proposed solution isn't working for me as I am not sure how to patch that into
a Qt iOS app.
[UIApplication sharedApplication].windows is an array, but I am not sure what
dragons are there with Qt.
Anyway, even patching in [UIApplication sharedApplication].windows[0] doesn't
seem to be working.
I don't care about hiding the MPVolumeView. I just need it to work
void setVolume(double volume){
UIWindow *mainWindow = [UIApplication sharedApplication].windows[0];
//UIView *mainWindow = [UIView new];
MPVolumeView *volumeView = [MPVolumeView new];
UISlider *volumeViewSlider = nil;
[mainWindow addSubview:volumeView];
for (UIView *view in volumeView.subviews) {
if ([view isKindOfClass:[UISlider class]]) {
volumeViewSlider = (UISlider *)view;
break;
}
}
if (volumeViewSlider != nil) {
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(0.01
* NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
volumeViewSlider.value = volume;
NSLog(@"volumeViewSlider set to %1.3f", volume);
});
} else {
NSLog(@"volumeViewSlider is nil");
}
}
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