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