如何在 iOS8 的 UIAlertController 中添加 UIDatePicker？

Question

我正在开发一个已经随 iOS-7 发布的项目。但现在由于操作表出现问题，所以我现在正在实现 UIAlertController。以下是我使用 UIPicker 显示 UIAlertController 的代码。

alertController = [UIAlertController alertControllerWithTitle:@"" message:@"" preferredStyle:UIAlertControllerStyleActionSheet];

        UIAlertAction *alertAction = [UIAlertAction actionWithTitle:@"" style:UIAlertActionStyleDefault handler:nil];
        [alertController addAction:alertAction];
        [alertController addAction:alertAction];
        [alertController addAction:alertAction];
        [alertController addAction:alertAction];
        [pickerToolbar setFrame:CGRectMake(0, 0, self.view.frame.size.width-20, 44)];
        [alertController.view addSubview:pickerToolbar];
        [alertController.view addSubview:picker];

        [alertController.view setBounds:CGRectMake(0, 0, self.view.frame.size.width, 485)];
        [self presentViewController:alertController animated:YES completion:nil];

但我无法在其中添加日期选择器。它与普通选择器不同，并且应用程序挂起。请为在 UIAlertController 中添加 UIDatePicker 的任何示例代码提供建议。提前致谢

Answer 1

Apple 一直不鼓励将 UIDatePicker 添加到操作表。自 iOS 7 以来，Apple 引入了内联日期选择器的使用（查看它在日历应用程序中是如何完成的）。

如果您设法使用 UIAlertController 破解了一个解决方法，它可能会在未来的 iOS 版本中再次崩溃。

Answer 2

这里是 iOS9+ Swift 代码。

将目标添加到您的日期按钮或其他视图。

     dateBtn.addTarget(self,action: #selector(YourViewController.dateSelect(_:)),forControlEvents: UIControlEvents.TouchDown) //my date button      


    func dateSelect(sender:UIButton)  {


    if (UI_USER_INTERFACE_IDIOM() == .Phone)
    {

        //init date picker
        self.datePicker = UIDatePicker(frame: CGRectMake(0, 0, self.view.frame.size.width,260))
        self.datePicker.datePickerMode = UIDatePickerMode.Date

        //add target
        self.datePicker.addTarget(self, action: #selector(YourViewController.dateSelected(_:)), forControlEvents: UIControlEvents.ValueChanged)

        //add to actionsheetview
        if(UIDevice.currentDevice().systemVersion >= "8.0")
        {

            let alertController = UIAlertController(title: "Date Selection", message:" " , preferredStyle: UIAlertControllerStyle.ActionSheet)

            alertController.view.addSubview(self.datePicker)//add subview

            let cancelAction = UIAlertAction(title: "Done", style: .Cancel) { (action) in

                self.dateSelected(self.datePicker)
                self.tableView.reloadData()

            }

            //add button to action sheet
            alertController.addAction(cancelAction)


            let height:NSLayoutConstraint = NSLayoutConstraint(item: alertController.view, attribute: NSLayoutAttribute.Height, relatedBy: NSLayoutRelation.Equal, toItem: nil, attribute: NSLayoutAttribute.NotAnAttribute, multiplier: 1, constant: 300)
            alertController.view.addConstraint(height);

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

        }


    }

}


//selected date func
func dateSelected(datePicker:UIDatePicker)
{

    let dateFormatter = NSDateFormatter()
    dateFormatter.dateStyle = NSDateFormatterStyle.ShortStyle

    let currentDate = datePicker.date
    let day = currentDate.day()
    let month = currentDate.month()
    let year = currentDate.year()

    let date  = "\(day)/\(month)/\(year)"

    print(date)

}

Answer 3

这对我有用

UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"\n\n\n\n\n\n\n\n\n\n\n" message:nil preferredStyle:UIAlertControllerStyleActionSheet];
UIDatePicker *picker = [[UIDatePicker alloc] init];
[picker setDatePickerMode:UIDatePickerModeDate];
[alertController.view addSubview:picker];
[alertController addAction:({
    UIAlertAction *action = [UIAlertAction actionWithTitle:@"OK" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action) {
        NSLog(@"OK");
        NSLog(@"%@",picker.date);
    }];
    action;
})];
UIPopoverPresentationController *popoverController = alertController.popoverPresentationController;
popoverController.sourceView = sender;
popoverController.sourceRect = [sender bounds];
[self presentViewController:alertController  animated:YES completion:nil];

Answer 4

在 Swift 2 中实现这一目标的简洁方式：

let vc = UIAlertController(title: "Pickup time", message: nil, preferredStyle: .Alert)
        vc.addTextFieldWithConfigurationHandler({ (textfield) -> Void in
            let datepicker = UIDatePicker()
            // add delegate ... here

            textfield.inputView = datepicker
        })
        vc.addAction(UIAlertAction(title: "OK", style: .Default, handler: nil))
        vc.addAction(UIAlertAction(title: "Cancel", style: .Cancel, handler: nil))
        presentViewController(vc, animated: true, completion: nil)

Answer 5

swift3 中的@idris 代码

//Function Start  
func dateSelect()  {

    //init date picker
    let datePicker = UIDatePicker(frame: CGRect(x: 0, y: 0, width: self.view.frame.size.width, height: 260))
    datePicker.datePickerMode = UIDatePickerMode.date

    //add target
    datePicker.addTarget(self, action: #selector(dateSelected(datePicker:)), for: UIControlEvents.valueChanged)

    //add to actionsheetview
    let alertController = UIAlertController(title: "Date Selection", message:" " , preferredStyle: UIAlertControllerStyle.actionSheet)

    alertController.view.addSubview(datePicker)//add subview

    let cancelAction = UIAlertAction(title: "Done", style: .cancel) { (action) in
        self.dateSelected(datePicker: datePicker)
    }

    //add button to action sheet
    alertController.addAction(cancelAction)

    let height:NSLayoutConstraint = NSLayoutConstraint(item: alertController.view, attribute: .height, relatedBy: .equal, toItem: nil, attribute: .notAnAttribute, multiplier: 1, constant: 300)
    alertController.view.addConstraint(height);

    self.present(alertController, animated: true, completion: nil)

}


//selected date func
@objc func dateSelected(datePicker:UIDatePicker) {

    let dateFormatter = DateFormatter()
    dateFormatter.dateStyle = DateFormatter.Style.short

    let currentDate = datePicker.date

    print(currentDate)

}

Answer 6

这是我在 iOS 7 和 iOS 8 上测试的代码

    - (id)initWithDatePicker:(NSString*)title parentView:(UIView*)parentView {
    self = [super init];
    if (self) {
        datePickerView = [[UIDatePicker alloc] init];
        datePickerView.datePickerMode = UIDatePickerModeDateAndTime;
        if (IS_IOS8_AND_UP) {
            alertViewController = [UIAlertController
                                   alertControllerWithTitle:EMPTY_STRING
                                   message:title
                                   preferredStyle:UIAlertControllerStyleActionSheet];
            UIView* aboveBlurLayer = alertViewController.view.subviews[0];
            [aboveBlurLayer addSubview:datePickerView];
            [aboveBlurLayer setWidth:SCREEN_WIDTH - 16];
            [datePickerView setWidth:SCREEN_WIDTH - 16];
            [alertViewController.view setWidth:SCREEN_WIDTH - 16];
            [alertViewController.view setBackgroundColor:[UIColor whiteColor]];

            UIAlertAction* alertAction =
            [UIAlertAction actionWithTitle:EMPTY_STRING
                                     style:UIAlertActionStyleDefault
                                   handler:nil];
            [alertViewController addAction:alertAction];
            [alertViewController addAction:alertAction];
            [alertViewController addAction:alertAction];
            [alertViewController addAction:alertAction];

            [datePickerView setBackgroundColor:[UIColor whiteColor]];
            [aboveBlurLayer addSubview:datePickerView];
        } else {
            actionSheet = [[UIActionSheet alloc] initWithTitle:title
                                                      delegate:self
                                             cancelButtonTitle:nil
                                        destructiveButtonTitle:nil
                                             otherButtonTitles:nil];

            [actionSheet addSubview:datePickerView];
        }

        [self addToolBar];
        isDatePicker = YES;
        parent = parentView;
    }
  return self;
}

在工具栏上，我有两个按钮“完成”和“取消”完成后，我通过代表发送回一个带有选定日期的呼叫，并在取消时关闭。此代码适用于 iOS 7 和 iOS 8

Answer 7

这可以通过一些技巧来完成。 这是我目前使用的，几乎不需要维护。

let alertController = UIAlertController(title: alertTitle, message: nil, preferredStyle: .actionSheet)

let picker = UIDatePicker()
picker.translatesAutoresizingMaskIntoConstraints = false
alertController.view.addSubview(picker)
alertController.view.heightAnchor.constraint(equalToConstant: 350).isActive = true
picker.leadingAnchor.constraint(equalTo: alertController.view.leadingAnchor).isActive = true
picker.trailingAnchor.constraint(equalTo: alertController.view.trailingAnchor).isActive = true
picker.topAnchor.constraint(equalTo: alertController.view.topAnchor, constant: 10).isActive = true
/// Add your actions here....