6

我正在尝试将日期选择器添加到警报视图。我可以通过单击按钮将动画添加到屏幕上，我看到一个黑框，但没有日期选择器。

这是我到目前为止所拥有的......

- (IBAction)showDatePicker {
    CGRect frame = CGRectMake(200, self.view.frame.size.height, self.view.frame.size.width, 0);  //CGRectMake(225, 145, 260, 125);
    UIPickerView *datePicker = [[UIPickerView alloc] initWithFrame:frame];
    UIAlertView *showDateAlert = [[UIAlertView alloc]
                                  initWithTitle:@"Enter the Code Date"
                                  message:@"Sample message"
                                  delegate:self
                                  cancelButtonTitle:@"Cancel"
                                  otherButtonTitles:@"Update", nil];

    [self.view addSubview:datePicker];
    [UIView beginAnimations:@"slideIn" context:nil];
    [datePicker setCenter:CGPointMake(datePicker.frame.origin.x, self.view.frame.size.height - datePicker.frame.size.height/2)];
    [UIView commitAnimations];
}

我找到了一个似乎正在工作的示例，但我在警报框中没有看到任何对话框或按钮，只有日期选择器本身。我在这里错过了什么吗？

- (IBAction)showDatePicker {
    CGRect frame = CGRectMake(225, self.view.frame.size.height, self.view.frame.size.width, 125);
    UIDatePicker *datePicker = [[UIDatePicker alloc] initWithFrame:frame];
    datePicker = [[UIDatePicker alloc] init];
    datePicker.datePickerMode = UIDatePickerModeDate;

    [datePicker setDate:[NSDate date]];

    UIAlertView *alert;
    alert = [[UIAlertView alloc]
             initWithTitle:@"Enter the Code Date"
             message:@"Sample message"
             delegate:self
             cancelButtonTitle:@"Cancel"
             otherButtonTitles:@"Update", nil];
    alert.delegate = self;
    [alert addSubview:datePicker];
    [alert show];
}
4

7 回答 7

6

在斯威夫特： 

        let myDatePicker: UIDatePicker = UIDatePicker()
        // setting properties of the datePicker
        myDatePicker.timeZone = NSTimeZone.localTimeZone()
        myDatePicker.frame = CGRectMake(0, 15, 270, 200)

        let alertController = UIAlertController(title: "\n\n\n\n\n\n\n\n", message: nil, preferredStyle: UIAlertControllerStyle.Alert)
        alertController.view.addSubview(myDatePicker)
        let somethingAction = UIAlertAction(title: "Ok", style: UIAlertActionStyle.Default, handler: nil)
        let cancelAction = UIAlertAction(title: "Cancel", style: UIAlertActionStyle.Cancel, handler: nil)
        alertController.addAction(somethingAction)
        alertController.addAction(cancelAction)
        self.presentViewController(alertController, animated: true, completion:{})
于 2016-09-13T18:40:35.437 回答
3

你不会喜欢这个答案，但我的建议是：不要那样做！UIAlertView 不适合您添加自己的子视图；你发现人们这样做的例子是错误行为的例子。创建您自己的视图，其中包含您想要的选择器、文本、按钮等，并以某种方式呈现。例如，您可以通过其自己的视图控制器以模态方式呈现它，例如使用presentModalViewController:animated:or presentViewController:animated:completion:。如果您使用的是 iPad，则可以使用弹出框（如果这很重要，它可以是模态的）。

于 2012-08-28T20:29:19.897 回答
3

我同意评论者的观点，他们一直说这不是实现这一目标的方法，原因有几个。首先，没有人喜欢不断弹出警报视图。其次，不适用于您的情况，它最终可能会导致应用程序被拒绝。Apple 更改了UIAlertView类引用中将其视图层次结构称为私有的措辞；我们都知道苹果对你在他们认为私人的事情上胡闹的感觉。

从 UIAlertView 类参考：

UIAlertView 类旨在按原样使用，不支持子类化。此类的视图层次结构是私有的，不得修改。

但既然你说这是一个私人应用程序，那就去吧。AUIAlertView只是一个UIView子类。所以框架和边界的所有规则仍然适用。这是一个基本示例，说明如何调整选择器的框架和警报的边界以挤入日期选择器。

// Create alert
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Hello" message:@"message" delegate:self cancelButtonTitle:@"Cancel" otherButtonTitles:@"OK", nil];
// Show alert (required for sizes to be available)
[alert show];
// Create date picker (could / should be an ivar)
UIDatePicker *picker = [[UIDatePicker alloc] initWithFrame:CGRectMake(10, alert.bounds.size.height, 320, 216)];
// Add picker to alert
[alert addSubview:picker];
// Adjust the alerts bounds
alert.bounds = CGRectMake(0, 0, 320 + 20, alert.bounds.size.height + 216 + 20);

编辑

正如评论和对许多“如何向 a 添加一些视图UIAlertView”问题的新答案所指出的那样，此方法在 iOS7 及更高版本中不再适用。这确实应该被视为这是一个根本上的坏主意的证据。

还要注意setValue:forKey:在普遍流传的“解决方案”中对无法修改 Apple 的私有视图层次结构的“问题”的使用。setValue:forKey:是引起私有 API 扫描器兴趣的方法之一。accessoryView在UIAlertView文档和标题中搜索。它不在文档中。标题中唯一相关的项目是一个名为的 ivar _accessoryView，它被标记为@private.

再次对于内部或私人应用程序，我想没关系，不过没关系。

于 2012-08-28T22:11:09.677 回答
2

这对我有用（使用iOS7）。在此之前调用它[alertView show]：

[alertView setValue:customContentView forKey:@"accessoryView"];

例子：

UIAlertView *av = [[UIAlertView alloc] initWithTitle:@"TEST" message:@"subview" delegate:nil cancelButtonTitle:@"NO" otherButtonTitles:@"YES", nil];
UIView *v = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 100, 50)];
v.backgroundColor = [UIColor yellowColor];
[av setValue:v forKey:@"accessoryView"];
[av show];

来源：iOS 7 UIDatePicker 中的 UIAlertView 自定义

于 2014-05-18T18:31:33.907 回答
2

这在 ios7 及更高版本中对我有用。

UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Select Date" message:@"" delegate:self cancelButtonTitle:@"Cancel" otherButtonTitles:@"OK", nil];
UIDatePicker *picker = [[UIDatePicker alloc] initWithFrame:CGRectMake(10, alert.bounds.size.height, 320, 216)];
[alert addSubview:picker];
alert.bounds = CGRectMake(0, 0, 320 + 20, alert.bounds.size.height + 216 + 20);
[alert setValue:picker forKey:@"accessoryView"];
[alert show];
于 2015-01-21T11:22:56.023 回答
1

Swift 5版本的@Matheus Domingos 答案

let myDatePicker: UIDatePicker = UIDatePicker()
myDatePicker.timeZone = NSTimeZone.local
myDatePicker.frame = CGRect(x: 0, y: 15, width: 270, height: 200)
let alertController = UIAlertController(title: "\n\n\n\n\n\n\n\n", message: nil, preferredStyle: UIAlertController.Style.alert)
alertController.view.addSubview(myDatePicker)
let somethingAction = UIAlertAction(title: "Ok", style: UIAlertAction.Style.default, handler: nil)
let cancelAction = UIAlertAction(title: "Cancel", style: UIAlertAction.Style.cancel, handler: nil)
alertController.addAction(somethingAction)
alertController.addAction(cancelAction)
present(alertController, animated: true, completion:{})

斯威夫特 5.2

let myDatePicker: UIDatePicker = UIDatePicker()
myDatePicker.timeZone = NSTimeZone.local
myDatePicker.frame = CGRect(x: 0, y: 15, width: 270, height: 200)
let alertController = UIAlertController(title: "\n\n\n\n\n\n\n\n", message: nil, preferredStyle: UIAlertController.Style.alert)
alertController.view.addSubview(myDatePicker)
let somethingAction = UIAlertAction(title: "Ok", style: UIAlertAction.Style.default, handler: nil)
let cancelAction = UIAlertAction(title: "Cancel", style: UIAlertAction.Style.cancel, handler: nil)
alertController.addAction(somethingAction)
alertController.addAction(cancelAction)
self.present(alertController, animated: true, completion: {})
于 2019-06-09T05:15:33.577 回答
0

这是我的 UIViewController 扩展解决方案。

typealias DatePickerHandler = (_ success: Bool, _ date:Date) -> Void
typealias TimePickerHandler = (_ success: Bool, _ date:Date) -> Void
extension UIViewController{

func showDatePicker(completionHandler: @escaping DatePickerHandler){
    let vc = UIViewController()
    vc.preferredContentSize = CGSize(width: 250,height: 300)
    let pickerView = UIDatePicker(frame: CGRect(x: 0, y: 0, width: vc.view.bounds.width, height: 300))
    pickerView.datePickerMode = UIDatePicker.Mode.date
    if #available(iOS 13.4, *) {
        pickerView.preferredDatePickerStyle = .wheels
    } else {
        // Fallback on earlier versions
    }
     vc.view.addSubview(pickerView)
    NSLayoutConstraint.activate([
        pickerView.leadingAnchor.constraint(equalTo: vc.view.leadingAnchor,constant: 8),
        pickerView.trailingAnchor.constraint(equalTo: vc.view.trailingAnchor,constant: 8),
        pickerView.topAnchor.constraint(equalTo: vc.view.topAnchor,constant: 8),
        pickerView.bottomAnchor.constraint(equalTo: vc.view.bottomAnchor,constant: 8),
    ])

       let editRadiusAlert = UIAlertController(title: "Select Date", message: "", preferredStyle: UIAlertController.Style.actionSheet)
       editRadiusAlert.setValue(vc, forKey: "contentViewController")
       editRadiusAlert.addAction(UIAlertAction(title: "Select", style: .default, handler: {action in
        completionHandler(true,pickerView.date)
       }))
       editRadiusAlert.addAction(UIAlertAction(title: "Cancel", style: .cancel, handler: {action in
            completionHandler(false,Date())
       }))
       self.present(editRadiusAlert, animated: true)
}
func showTimePicker(completionHandler: @escaping TimePickerHandler){
    let vc = UIViewController()
    vc.preferredContentSize = CGSize(width: 250,height: 300)
    let pickerView = UIDatePicker(frame: CGRect(x: 0, y: 0, width: vc.view.bounds.width, height: 300))
    

    pickerView.datePickerMode = UIDatePicker.Mode.time
    if #available(iOS 13.4, *) {
        pickerView.preferredDatePickerStyle = .wheels
    } else {
        // Fallback on earlier versions
    }
    vc.view.addSubview(pickerView)
    NSLayoutConstraint.activate([
        pickerView.leadingAnchor.constraint(equalTo: vc.view.leadingAnchor,constant: 8),
        pickerView.trailingAnchor.constraint(equalTo: vc.view.trailingAnchor,constant: 8),
        pickerView.topAnchor.constraint(equalTo: vc.view.topAnchor,constant: 8),
        pickerView.bottomAnchor.constraint(equalTo: vc.view.bottomAnchor,constant: 8),
    ])
    

    let editRadiusAlert = UIAlertController(title: "Select Time", message: "", preferredStyle: UIAlertController.Style.actionSheet)
       editRadiusAlert.setValue(vc, forKey: "contentViewController")
       editRadiusAlert.addAction(UIAlertAction(title: "Select", style: .default, handler: {action in
            completionHandler(true,pickerView.date)
        }))
        editRadiusAlert.addAction(UIAlertAction(title: "Cancel", style: .cancel, handler: {action in
             completionHandler(false,Date())
        }))
    
    self.present(editRadiusAlert, animated: true)
}
}

这里如何在 UIViewController 中使用它

    showDatePicker { (isSuccess, date) in
        if(isSuccess){
        }
    }

快乐编码！

于 2021-05-02T08:00:53.490 回答