UIDatePicker in UIPopover

Try with below code. It will work fine:

Objective-C

- (IBAction)showDatePicker:(UIButton *)sender {    UIDatePicker *datePicker = [[UIDatePicker alloc]init];//Date picker    datePicker.frame = CGRectMake(0, 0, 320, 216);    datePicker.datePickerMode = UIDatePickerModeDateAndTime;    [datePicker setMinuteInterval:5];    [datePicker addTarget:self action:@selector(dateChanged:) forControlEvents:UIControlEventValueChanged];//need to implement this method in same class    UIView *popoverView = [[UIView alloc] init];   //view    popoverView.backgroundColor = [UIColor clearColor];    [popoverView addSubview:datePicker];    // here you can add tool bar with done and cancel buttons if required    UIViewController *popoverViewController = [[UIViewController alloc] init];    popoverViewController.view = datePicker;    popoverViewController.view.frame = CGRectMake(0, 0, 320, 216);    popoverViewController.modalPresentationStyle = UIModalPresentationPopover;    popoverViewController.preferredContentSize = CGSizeMake(320, 216);    popoverViewController.popoverPresentationController.sourceView = sender; // source button    popoverViewController.popoverPresentationController.sourceRect = sender.bounds; // source button bounds    //popoverViewController.popoverPresentationController.delegate = self;    [self presentViewController:popoverViewController animated:YES completion:nil];}- (void)dateChanged:(UIDatePicker *)datePicker {    NSLog(@"DATE :: %@", datePicker.date);}

Swift 4.2

 @IBAction func showDatePicker(_ sender: UIButton) {    let datePicker = UIDatePicker()//Date picker    let datePickerSize = CGSize(width: 320, height: 216) //Date picker size    datePicker.frame = CGRect(x: 0, y: 0, width: datePickerSize.width, height: datePickerSize.height)    datePicker.datePickerMode = .dateAndTime    datePicker.minuteInterval = 5    datePicker.addTarget(self, action: #selector(dateChanged(_:)), for: .valueChanged)    let popoverView = UIView()    popoverView.backgroundColor = UIColor.clear    popoverView.addSubview(datePicker)    // here you can add tool bar with done and cancel buttons if required    let popoverViewController = UIViewController()    popoverViewController.view = popoverView    popoverViewController.view.frame = CGRect(x: 0, y: 0, width: datePickerSize.width, height: datePickerSize.height)    popoverViewController.modalPresentationStyle = .popover    popoverViewController.preferredContentSize = datePickerSize    popoverViewController.popoverPresentationController?.sourceView = sender // source button    popoverViewController.popoverPresentationController?.sourceRect = sender.bounds // source button bounds    popoverViewController.popoverPresentationController?.delegate = self // to handle popover delegate methods     self.present(popoverViewController, animated: true, completion: nil)    }    @objc func dateChanged(_ datePicker: UIDatePicker) {        print("DATE :: \(datePicker.date)")    }

Same code will work iPhone also if you implement below delegate respective in view controller

extension YourViewController : UIPopoverPresentationControllerDelegate {    func adaptivePresentationStyle(for controller: UIPresentationController) -> UIModalPresentationStyle {        // Force popover style        return UIModalPresentationStyle.none    }}

Now since you have tagged iPhone It can clearly be assumed that you are trying to use UIPopoverController in iPhone But UIPopoverController is available only for iPad. So it is resulting in a crash since iPhone doesn't recognize that controller.