iOS popover show twice will crash - ios

Question

I'm using objective-c write about UIAlertControllerStyleActionSheet of UIAlertcontroller.
I want to show alert sheet on the iPhone, and popoverPresentationController on the iPad.
First, I have set the UIPopoverPresentationControllerDelegate delegate.
When I click my button, the pop over have show is correct.
But I click on the screen dismiss the popover. it will show below warning.
[Warning] <_UIPopoverBackgroundVisualEffectView 0x14be52ef0> is being asked to animate its opacity. This will cause the effect to appear broken until opacity returns to 1.
Now When I click the button show the pop view again.
It will crash show below log.
Terminating app due to uncaught exception 'NSGenericException', reason: 'Your application has presented a UIAlertController () of style UIAlertControllerStyleActionSheet. The modalPresentationStyle of a UIAlertController with this style is UIModalPresentationPopover. You must provide location information for this popover through the alert controller's popoverPresentationController. You must provide either a sourceView and sourceRect or a barButtonItem. If this information is not known when you present the alert controller, you may provide it in the UIPopoverPresentationControllerDelegate method -prepareForPopoverPresentation.'
*** First throw call stack:
(0x18d9a41c0 0x18c3dc55c 0x19418a8b0 0x193ac60a8 0x193ac3df4 0x193a08d0c 0x1939faac0 0x19376a22c 0x18d9517dc 0x18d94f40c 0x18d94f89c 0x18d87e048 0x18f2ff198 0x1937e2b50 0x1937dd888 0x10011198c 0x18c8605b8)
libc++abi.dylib: terminating with uncaught exception of type NSException
Have anyone know how to resolve the problem?
My code is below:
#interface ViewController () <...UITextViewDelegate,UITextFieldDelegate...> {
UIAlertController *alertTypeAlertController;
UIAlertAction *alertType1Action;
UIAlertAction *alertType2Action;
UIPopoverPresentationController *popPresenter;
}
- (void)viewDidLoad {
[super viewDidLoad];
alertTypeAlertController = [UIAlertController
alertControllerWithTitle:#"selecte one:"
message:nil
preferredStyle:UIAlertControllerStyleActionSheet];
alertType1Action = [UIAlertAction
actionWithTitle:#"Type1"
style:UIAlertActionStyleDefault
handler:nil];
alertType2Action = [UIAlertAction
actionWithTitle:#"Type2"
style:UIAlertActionStyleDefault
handler:nil];
[alertTypeAlertController addAction: alertType1Action];
[alertTypeAlertController addAction: alertType2Action];
// for ipad
popPresenter = [alertTypeAlertController popoverPresentationController];
popPresenter.permittedArrowDirections = UIPopoverArrowDirectionLeft;
popPresenter.delegate = self;
popPresenter.sourceView = self.theTypeBtn;
popPresenter.sourceRect = CGRectMake(230, 22, 10, 10);
....
}
- (void)popoverPresentationControllerDidDismissPopover:(UIPopoverPresentationController *)popoverPresentationController {
// called when a Popover is dismissed
}
- (BOOL)popoverPresentationControllerShouldDismissPopover:(UIPopoverPresentationController *)popoverPresentationController {
// return YES if the Popover should be dismissed
// return NO if the Popover should not be dismissed
return YES;
}
-(UIModalPresentationStyle)adaptivePresentationStyleForPresentationController:(UIPresentationController *)controller {
return UIModalPresentationNone;
}
enter code here
Thank you very much.

Answer 1

Maybe the UIAlertController and UIPopoverPresentationController objects strongly referenced by the ViewController object which makes
the Popover can't release after you dismiss it.
I later found your problem is that you try to create popPresenter
once in the viewDidLoad method and present it every time you touch
the button,you should create a new one instead,you can move the ViewDidLoad code to a new method,and call it by touch event, fix like this:
- (void)makePopover
{
alertTypeAlertController = [UIAlertController
alertControllerWithTitle:#"selecte one:"
message:nil
preferredStyle:UIAlertControllerStyleActionSheet];
alertType1Action = [UIAlertAction
actionWithTitle:#"Type1"
style:UIAlertActionStyleDefault
handler:nil];
alertType2Action = [UIAlertAction
actionWithTitle:#"Type2"
style:UIAlertActionStyleDefault
handler:nil];
[alertTypeAlertController addAction: alertType1Action];
[alertTypeAlertController addAction: alertType2Action];
// for ipad
popPresenter = [alertTypeAlertController popoverPresentationController];
popPresenter.permittedArrowDirections = UIPopoverArrowDirectionLeft;
popPresenter.canOverlapSourceViewRect = YES; // adding this line
popPresenter.delegate = self;
popPresenter.sourceView = self.theTypeBtn;
popPresenter.sourceRect = CGRectMake(230, 22, 10, 10);
}
- (IBAction)touchButton:(id)sender {
[self makePopover];
[self presentViewController:alertTypeAlertController animated:YES completion:nil];
}

Answer 2

I am just modifying your code, please check if it is working or not.
- (IBAction)actionButton:(UIButton*)sender {
alertTypeAlertController = [UIAlertController
alertControllerWithTitle:#"selecte one:"
message:nil
preferredStyle:UIAlertControllerStyleActionSheet];
alertType1Action = [UIAlertAction
actionWithTitle:#"Type1"
style:UIAlertActionStyleDefault
handler:nil];
alertType2Action = [UIAlertAction
actionWithTitle:#"Type2"
style:UIAlertActionStyleDefault
handler:nil];
[alertTypeAlertController addAction: alertType1Action];
[alertTypeAlertController addAction: alertType2Action];
// for ipad
if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad) {
popPresenter = [alertTypeAlertController popoverPresentationController];
popPresenter.permittedArrowDirections = UIPopoverArrowDirectionLeft;
popPresenter.delegate = self;
popPresenter.sourceView = self.theTypeBtn;
popPresenter.sourceRect = CGRectMake(230, 22, 10, 10);
}
[self presentViewController:alertTypeAlertController animated:YES completion:nil];
}