iOS: how to link iPhone settings to PHPhotoLibrary permission - ios

Question

I'm trying to implement an app accessing the camera roll. Here is how I'm checking for permissions:
-(void)viewDidAppear:(BOOL)animated
{
[super viewDidAppear:YES];
PHAuthorizationStatus status = [PHPhotoLibrary authorizationStatus];
if (status != PHAuthorizationStatusAuthorized) {
NSString *accessDescription = [[NSBundle mainBundle]
objectForInfoDictionaryKey:#"NSPhotoLibraryUsageDescription"];
UIAlertController * alertController = [UIAlertController alertControllerWithTitle:accessDescription
message:#"To give permissions tap on 'Change Settings' button"
preferredStyle:UIAlertControllerStyleAlert];
UIAlertAction *cancelAction = [UIAlertAction actionWithTitle:#"Cancel"
style:UIAlertActionStyleCancel
handler:nil];
[alertController addAction:cancelAction];
UIAlertAction *settingsAction = [UIAlertAction
actionWithTitle:#"Change Settings"
style:UIAlertActionStyleDefault
handler:^(UIAlertAction * _Nonnull action) {
[[UIApplication sharedApplication] openURL:[NSURL URLWithString:UIApplicationOpenSettingsURLString]
options:#{}
completionHandler:nil];
}];
[alertController addAction:settingsAction];
[[UIApplication sharedApplication].keyWindow.rootViewController presentViewController:alertController
animated:YES
completion:nil];
}
}
I also add it Settings.bundle:
But I haven't figure it out how can link the toggle switch to the permissions. Any of you knows how can I link the toggle switch to the camera roll permissions ?
I'll really appreciate your help.

Answer 1

You can try this code :
if (status == PHAuthorizationStatusNotDetermined) {
// Access has not been determined.
[PHPhotoLibrary requestAuthorization:^(PHAuthorizationStatus status) {
if (status == PHAuthorizationStatusAuthorized) {
// do something
}else {
// Access has been denied.
}
}];
}