UIPopover ¿Cómo hago un popover con botones como este?

Question

Me pregunto cómo puedo crear un popover con botones como este.

RESPUESTA:

UIActionSheet * actionSheet = [[UIActionSheet alloc] initWithTitle: nil 
                  delegate: self 
               cancelButtonTitle: nil 
              destructiveButtonTitle: nil 
               otherButtonTitles: @"Take Photo", 
                    @"Choose Existing Photo", nil]; 

[actionSheet showFromRect: button.frame inView: button.superview animated: YES]; 

En algún otro lugar en su clase de objeto delegado ...

-(void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex { 
    if (buttonIndex == 0) { 
     // take photo... 
    } 
    else if (buttonIndex == 1) { 
     // choose existing photo... 
    } 
} 

Answer 1

Ésta es una UIActionSheet. En el iPhone, se anima desde la parte inferior. En el iPad aparece en un popover.

Suponiendo que estás haciendo esto en la prensa de un botón:

UIActionSheet * actionSheet = [[UIActionSheet alloc] initWithTitle: nil 
                  delegate: self 
               cancelButtonTitle: nil 
              destructiveButtonTitle: nil 
               otherButtonTitles: @"Take Photo", 
                    @"Choose Existing Photo", nil]; 

[actionSheet showFromRect: button.frame inView: button.superview animated: YES]; 

---

En iOS8 +, debe utilizar la nueva clase UIAlertController:

UIAlertController * alertController = [UIAlertController alertControllerWithTitle: nil 
                      message: nil 
                    preferredStyle: UIAlertControllerStyleActionSheet]; 
[alertController addAction: [UIAlertAction actionWithTitle: @"Take Photo" style: UIAlertActionStyleDefault handler:^(UIAlertAction *action) { 
    // Handle Take Photo here 
}]]; 
[alertController addAction: [UIAlertAction actionWithTitle: @"Choose Existing Photo" style: UIAlertActionStyleDefault handler:^(UIAlertAction *action) { 
    // Handle Choose Existing Photo here 
}]]; 

alertController.modalPresentationStyle = UIModalPresentationPopover; 

UIPopoverPresentationController * popover = alertController.popoverPresentationController; 
popover.permittedArrowDirections = UIPopoverArrowDirectionUp; 
popover.sourceView = sender; 
popover.sourceRect = sender.bounds; 

[self presentViewController: alertController animated: YES completion: nil]; 

---

o en Swift

let alertController = UIAlertController(title: nil, message: nil, preferredStyle: .ActionSheet) 
alertController.addAction(UIAlertAction(title: "Take Photo", style: .Default, handler: { alertAction in 
    // Handle Take Photo here 
    })) 
alertController.addAction(UIAlertAction(title: "Choose Existing Photo", style: .Default, handler: { alertAction in 
    // Handle Choose Existing Photo 
    })) 
alertController.modalPresentationStyle = .Popover 

let popover = alertController.popoverPresentationController! 
popover.permittedArrowDirections = .Up 
popover.sourceView = sender 
popover.sourceRect = sender.bounds 

presentViewController(alertController, animated: true, completion: nil) 

Answer 2

Similar a las otras respuestas, pero esto es muy fácil de implementar en comparación.

Haga que su clase use el UIActionSheetDelegate.

Ejemplo:

@interface ExampleViewController : UIViewController <UIActionSheetDelegate> 

A continuación, añada a su ExampleViewController.mm/m

- (void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex { //Get the name of the current pressed button 
NSString *buttonTitle = [actionSheet buttonTitleAtIndex:buttonIndex]; 
if ([buttonTitle isEqualToString:@"Remove"]) { 
    NSLog(@"Remove this actionSheet"); } 
if ([buttonTitle isEqualToString:@"Button 1"]) { 
    NSLog(@"Button 1 pressed"); } 
if ([buttonTitle isEqualToString:@"Button 2"]) { 
    NSLog(@"Button 2 pressed"); } 
if ([buttonTitle isEqualToString:@"Button 3"]) { 
    NSLog(@"Button 3 pressed"); } 
if ([buttonTitle isEqualToString:@"Cancel"]) { 
    NSLog(@"Cancel clicked (anywhere away from it)"); } } 

Ahora en un evento de tecla pulsada o dónde/cuándo desea que esta en Emergente llamar a los siguientes:

- (IBAction)aButtonPressed:(id)sender { 
    NSString *actionSheetTitle = @"Action Sheet"; // Title 
    NSString *destroyTitle = @"Destroy"; // Button titles 
    NSString *button1 = @"Button 1"; 
    NSString *button2 = @"Button 2"; 
    NSString *button3 = @"Button 3"; 
    NSString *cancelTitle = @"Cancel"; 
    UIActionSheet *actionSheet = [[UIActionSheet alloc] 
                                  initWithTitle:actionSheetTitle 
                                  delegate:self 
                                   cancelButtonTitle:cancelTitle 
                                  destructiveButtonTitle:destroyTitle 
                                  otherButtonTitles:button1, button2, button3, nil]; [actionSheet showInView:self.view]; 
} 

Y más información sobre esto @: http://developer.apple.com/library/ios/#documentation/uikit/reference/UIActionSheet_Class/Reference/Reference.html