ipad - segun - Cambiar la hoja de acción de la flecha emergente en iOS8

ios 8.0 iphone 4

Question

Estoy usando UIAlertController . Pero en iPad con iOS 8, actionSheet se muestra con una flecha emergente. ¿Alguna idea para esconder esa flecha?

Aquí está mi código:

UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"this is alert controller" message:@"yeah" preferredStyle:UIAlertControllerStyleActionSheet];
UIAlertAction *cancelAction = [UIAlertAction
actionWithTitle:NSLocalizedString(@"Cancel", @"Cancel action")
style:UIAlertActionStyleCancel
handler:^(UIAlertAction *action)
{
NSLog(@"Cancel action");
}];
UIAlertAction *okAction = [UIAlertAction
actionWithTitle:NSLocalizedString(@"OK", @"OK action")
style:UIAlertActionStyleDefault
handler:^(UIAlertAction *action)
{
NSLog(@"OK action");
}];
UIAlertAction *deleteAction = [UIAlertAction
actionWithTitle:NSLocalizedString(@"Delete", @"Delete action")
style:UIAlertActionStyleDestructive
handler:^(UIAlertAction *action) {
NSLog(@"Delete action");
}];
[alertController addAction:cancelAction];
[alertController addAction:okAction];
[alertController addAction:deleteAction];
UIPopoverPresentationController *popover = alertController.popoverPresentationController;
if (popover) {
popover.sourceView = self.view;
popover.sourceRect = self.view.bounds;
popover.permittedArrowDirections = UIPopoverArrowDirectionUnknown;
}
[self presentViewController:alertController animated:YES completion:nil];

Answer 1

Estás en el camino equivocado al usar UIPopoverPresentationController para mostrar una alerta. Simplemente no necesitas ese código cortado ...

UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"this is alert controller" message:@"yeah" preferredStyle:UIAlertControllerStyleActionSheet];
UIAlertAction *cancelAction = [UIAlertAction
actionWithTitle:NSLocalizedString(@"Cancel", @"Cancel action")
style:UIAlertActionStyleCancel
handler:^(UIAlertAction *action)
{
NSLog(@"Cancel action");
}];
UIAlertAction *okAction = [UIAlertAction
actionWithTitle:NSLocalizedString(@"OK", @"OK action")
style:UIAlertActionStyleDefault
handler:^(UIAlertAction *action)
{
NSLog(@"OK action");
}];
UIAlertAction *deleteAction = [UIAlertAction
actionWithTitle:NSLocalizedString(@"Delete", @"Delete action")
style:UIAlertActionStyleDestructive
handler:^(UIAlertAction *action) {
NSLog(@"Delete action");
}];
[alertController addAction:cancelAction];
[alertController addAction:okAction];
[alertController addAction:deleteAction];
[self presentViewController:alertController animated:YES completion:nil];

Answer 2

La respuesta de Jageen, en Swift:

popoverController.permittedArrowDirections = UIPopoverArrowDirection(rawValue: 0)

Answer 3

La respuesta seleccionada no centra la alerta si tiene una barra de navegación / estado. Para centrar exactamente su controlador de alerta:

alertController.popoverPresentationController.sourceRect = [self sourceRectForCenteredAlertController];
alertController.popoverPresentationController.sourceView = self.view;
alertController.popoverPresentationController.permittedArrowDirections = 0;

Con el método de conveniencia:

- (CGRect)sourceRectForCenteredAlertController
{
CGRect sourceRect = CGRectZero;
sourceRect.origin.x = CGRectGetMidX(self.view.bounds)-self.view.frame.origin.x/2.0;
sourceRect.origin.y = CGRectGetMidY(self.view.bounds)-self.view.frame.origin.y/2.0;
return sourceRect;
}

Además, el controlador de alertas no permanece centrado si se gira la vista. Para mantener centrado el controlador de alertas, debe actualizar sourceRect después de la rotación. Por ejemplo:

- (void)didRotateFromInterfaceOrientation:(UIInterfaceOrientation)fromInterfaceOrientation
{
// Check if your alert controller is still being presented
if (alertController.presentingViewController) {
alertController.popoverPresentationController.sourceRect = [self sourceRectForCenteredAlertController];
}
}

O, si no desea usar eventos de rotación, puede usar el método de delegado popoverPresentationController para reposicionar la popoverPresentationController :

- (void)popoverPresentationController:(UIPopoverPresentationController *)popoverPresentationController willRepositionPopoverToRect:(inout CGRect *)rect inView:(inout UIView *__autoreleasing _Nonnull *)view
{
// Re-center with new rect
}

Answer 4

Solución:
use below line for remove arrow from action sheet

[yourAlertController.popoverPresentationController setPermittedArrowDirections:0];

Muestra

UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"Test Action Sheet" message:@"Message" preferredStyle:UIAlertControllerStyleActionSheet];
UIAlertAction *cancelAction = [UIAlertAction
actionWithTitle:@"Cancel"
style:UIAlertActionStyleDestructive
handler:^(UIAlertAction *action)
{
NSLog(@"Cancel action");
}];
UIAlertAction *okAction = [UIAlertAction
actionWithTitle:@"Ok"
style:UIAlertActionStyleDefault
handler:^(UIAlertAction *action)
{
NSLog(@"OK action");
}];
UIAlertAction *otherAction = [UIAlertAction
actionWithTitle:@"Other"
style:UIAlertActionStyleDefault
handler:^(UIAlertAction *action)
{
NSLog(@"Otheraction");
}];
[alertController addAction:okAction];
[alertController addAction:otherAction];
[alertController addAction:cancelAction];
// Remove arrow from action sheet.
[alertController.popoverPresentationController setPermittedArrowDirections:0];
//For set action sheet to middle of view.
alertController.popoverPresentationController.sourceView = self.view;
alertController.popoverPresentationController.sourceRect = self.view.bounds;
[self presentViewController:alertController animated:YES completion:nil];

Salida