rattletrap99 rattletrap99 - 1 month ago 34
iOS Question

UIPopoverPresentationController on iPhone doesn't produce popover

I'm trying to implement the new

UIPopoverPresentationController
in my iPhone app (using Objective C). What I want is a simple popover with a tableview that emanates from the initiating button.

--Edit--

Here's my REVISED code, adapted from research in the docs, SO, and from input in comments below:

- (IBAction)selectCategoryBtn:(UIButton *)sender
{
[self performSegueWithIdentifier:@"CatSelectSegue" sender:self.selCatButton];
}

-(void) prepareForSegue:(UIStoryboardSegue *) segue Sender:(id) sender
{
if (sender == self.selCatButton)
{
if ([segue.identifier isEqualToString:@"CatSelectSegue"])
{
UIPopoverPresentationController *controller = segue.destinationViewController;
controller.delegate = self;
controller.sourceView = self.selCatButton;
controller.sourceRect = self.selCatButton.frame;
}
}
}


-(UIModalPresentationStyle)adaptivePresentationStyleForPresentationController:(UIPresentationController *)controller
{
return UIModalPresentationNone;


Here's my storyboard hookup:

enter image description here

However this simply presents a tableview in a modal fashion, rising up from the bottom and consuming the entire screen.

I've googled, and looked all over SO, but it appears that I'm not the only one confused by what I'd hoped would resolve a nettlesome issue for the iPhone.

Can anyone see a glitch in my code or direct me to a clear tutorial? I've looked, but maybe the API is just so new nobody's got a handle on it yet.

Thanks!

2nd edit:

Here's what gets presented as a result of the code above. I reduced the size of the tableview in the View Controller I expected to be presented as a popover. I colored the background gray, just to clarify what's showing up instead of the popover.

enter image description here

Answer

Ignore @Jef's answer that you can't do this - @Jef is outright wrong. I have no idea why it's marked as correct.

Steps:

A) Link your UIButton to the popover's view controller using the Present As Popover segue type. I actually had to create a new project to get this to appear but it's probably something to do with the base SDK.

B) Make the View Controller containing the UIButton conform to the <UIPopoverPresentationControllerDelegate>. E.g. In your MyViewController.m file add:

@interface MyViewController () <UIPopoverPresentationControllerDelegate>

C) Add the method below to the View Controller containing the UIButton:

- (UIModalPresentationStyle)adaptivePresentationStyleForPresentationController:(UIPresentationController *)controller {

    return UIModalPresentationNone;
}

D) Add the following into your prepareForSegue:sender: replacing your segue.identifier check:

if ([segue.identifier isEqualToString:@"CatSelectSegue"]) {
    UIViewController *dvc = segue.destinationViewController;
    UIPopoverPresentationController *controller = dvc.popoverPresentationController;
    if (controller) {
        controller.delegate = self;
    }
}

Code tested and proof it works:

Popover on iPhone without 3rd Party Controls

Edit: My test app TPOPViewController.m file where the magic happens:

#import "TPOPViewController.h"

@interface TPOPViewController () <UIPopoverPresentationControllerDelegate>//, UIAdaptivePresentationControllerDelegate>

@end

@implementation TPOPViewController

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {

    NSString *identifier = segue.identifier;
    if ([identifier isEqualToString:@"popover"]) {
        UIViewController *dvc = segue.destinationViewController;
        UIPopoverPresentationController *ppc = dvc.popoverPresentationController;
        if (ppc) {
            if ([sender isKindOfClass:[UIButton class]]) { // Assumes the popover is being triggered by a UIButton
                ppc.sourceView = (UIButton *)sender;
                ppc.sourceRect = [(UIButton *)sender bounds];
            }
            ppc.delegate = self;
        }
    }
}

- (UIModalPresentationStyle)adaptivePresentationStyleForPresentationController:(UIPresentationController *)controller {

    return UIModalPresentationNone;
}

@end

My test storyboard as well:

Popover on iPhone test storyboard