有什么办法可以将UIPickerView添加到Swift中的UIAlertController（Alert或ActionSheet）？

Question

我对swift（以及所有的iOS编程）完全陌生，但我开始搞乱了它（当所有东西都是beta版本时，这不是一个好主意：D）。所以我试图找出自己，但仍然没有。甚至试图添加没有任何成功的包含选取器的子视图。那么，任何人都可以帮助我吗？

Answer 1

那么这是我的最终代码，它为我工作。这是由几个想法混合而成的。我接受我的答案的主要原因是我的代码在Swift中，我的代码使用UIAlertController，我的代码是用于选择器。我想感谢杰根 - 我的回答是基于他的想法。

func showPickerInActionSheet(sentBy: String) { 
    var title = "" 
    var message = "\n\n\n\n\n\n\n\n\n\n"; 
    var alert = UIAlertController(title: title, message: message, preferredStyle: UIAlertControllerStyle.ActionSheet); 
    alert.modalInPopover = true; 


    //Create a frame (placeholder/wrapper) for the picker and then create the picker 
    var pickerFrame: CGRect = CGRectMake(17, 52, 270, 100); // CGRectMake(left), top, width, height) - left and top are like margins 
    var picker: UIPickerView = UIPickerView(frame: pickerFrame); 

    /* If there will be 2 or 3 pickers on this view, I am going to use the tag as a way 
    to identify them in the delegate and datasource. /* This part with the tags is not required. 
    I am doing it this way, because I have a variable, witch knows where the Alert has been invoked from.*/ 
    if(sentBy == "profile"){ 
     picker.tag = 1; 
    } else if (sentBy == "user"){ 
     picker.tag = 2; 
    } else { 
     picker.tag = 0; 
    } 

    //set the pickers datasource and delegate 
    picker.delegate = self; 
    picker.dataSource = self; 

    //Add the picker to the alert controller 
    alert.view.addSubview(picker); 

    //Create the toolbar view - the view witch will hold our 2 buttons 
    var toolFrame = CGRectMake(17, 5, 270, 45); 
    var toolView: UIView = UIView(frame: toolFrame); 

    //add buttons to the view 
    var buttonCancelFrame: CGRect = CGRectMake(0, 7, 100, 30); //size & position of the button as placed on the toolView 

    //Create the cancel button & set its title 
    var buttonCancel: UIButton = UIButton(frame: buttonCancelFrame); 
    buttonCancel.setTitle("Cancel", forState: UIControlState.Normal); 
    buttonCancel.setTitleColor(UIColor.blueColor(), forState: UIControlState.Normal); 
    toolView.addSubview(buttonCancel); //add it to the toolView 

    //Add the target - target, function to call, the event witch will trigger the function call 
    buttonCancel.addTarget(self, action: "cancelSelection:", forControlEvents: UIControlEvents.TouchDown); 


    //add buttons to the view 
    var buttonOkFrame: CGRect = CGRectMake(170, 7, 100, 30); //size & position of the button as placed on the toolView 

    //Create the Select button & set the title 
    var buttonOk: UIButton = UIButton(frame: buttonOkFrame); 
    buttonOk.setTitle("Select", forState: UIControlState.Normal); 
    buttonOk.setTitleColor(UIColor.blueColor(), forState: UIControlState.Normal); 
    toolView.addSubview(buttonOk); //add to the subview 

    //Add the tartget. In my case I dynamicly set the target of the select button 
    if(sentBy == "profile"){ 
     buttonOk.addTarget(self, action: "saveProfile:", forControlEvents: UIControlEvents.TouchDown); 
    } else if (sentBy == "user"){ 
     buttonOk.addTarget(self, action: "saveUser:", forControlEvents: UIControlEvents.TouchDown); 
    } 

    //add the toolbar to the alert controller 
    alert.view.addSubview(toolView); 

    self.presentViewController(alert, animated: true, completion: nil); 
} 

func saveProfile(sender: UIButton){ 
    // Your code when select button is tapped 

} 

func saveUser(sender: UIButton){ 
    // Your code when select button is tapped 
} 

func cancelSelection(sender: UIButton){ 
    println("Cancel"); 
    self.dismissViewControllerAnimated(true, completion: nil); 
    // We dismiss the alert. Here you can add your additional code to execute when cancel is pressed 
} 

// returns number of rows in each component.. 
func pickerView(pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int{ 
    if(pickerView.tag == 1){ 
     return self.profilesList.count; 
    } else if(pickerView.tag == 2){ 
     return self.usersList.count; 
    } else { 
     return 0; 
    } 
} 

// Return the title of each row in your picker ... In my case that will be the profile name or the username string 
func pickerView(pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String! { 
    if(pickerView.tag == 1){ 

      var selectedProfile: Profiles = self.profilesList[row] as Profiles; 
      return selectedProfile.profileName; 

    } else if(pickerView.tag == 2){ 

      var selectedUser: Users = self.usersList[row] as Users; 
      return selectedUser.username; 

    } else { 

     return ""; 

    } 

} 

func pickerView(pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) { 
    if(pickerView.tag == 1){ 
      var choosenProfile: Profiles = profilesList[row] as Profiles; 
      self.selectedProfile = choosenProfile.profileName; 
    } else if (pickerView.tag == 2){ 
      var choosenUser: Profiles = usersList[row] as Users; 
      self.selectedUsername = choosenUser.username; 
    } 

} 

Answer 2

我认为从测试版开始并不是个坏主意。 您需要自定义UIAlertView。请注意0​​的可用性只适用于iOS 8.0的。

看 there 和 there

Answer 3

这里是一个github project弹出屏幕的中心的UIDatePicker。它不使用UIAlertController或UIAlertView。我不认为这是警报类的意图。

Answer 4

试试这个我做了一些诀窍...

下面的代码在iPod的iOS8beta5 + XCode6
工作对我来说我在Objective-C添加UIActivityIndi​​catorView控制UIAlertController。

UIAlertController *alert = [UIAlertController alertControllerWithTitle:nil 
             message:@"Please wait\n\n\n" 
           preferredStyle:UIAlertControllerStyleAlert]; 

    UIActivityIndicatorView *spinner = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhiteLarge]; 
    spinner.center = CGPointMake(130.5, 65.5); 
    spinner.color = [UIColor blackColor]; 
    [spinner startAnimating]; 
    [alert.view addSubview:spinner]; 
    [self presentViewController:alert animated:NO completion:nil]; 

---

注：
这是在Objective-C，但这个它证明我们也能做到这一点使用快捷。

Answer 5

我需要做同样的事情，这就是我解决它的方式。我做了类似Jageen的事情。我的代码如下。请注意，我将值放在UIPickerView的代码的不同部分。

//Need to use an UIAlertController for iOS 8 instead of an action view 
UIAlertController *alert = [UIAlertController alertControllerWithTitle:nil 
           message:@"\n\n\n\n\n\n\n\n" 
           preferredStyle:UIAlertControllerStyleAlert]; 

//Make a frame for the picker & then create the picker 
CGRect pickerFrame = CGRectMake(0, 0, 270, 100); 
UIPickerView *regionsPicker = [[UIPickerView alloc] initWithFrame:pickerFrame]; 

//There will be 3 pickers on this view so I am going to use the tag as a way 
//to identify them in the delegate and datasource 
regionsPicker.tag = 1; 

//set the pickers datasource and delegate 
regionsPicker.dataSource = self; 
regionsPicker.delegate = self; 

//set the pickers selection indicator to true so that the user will now which one that they are chosing 
[regionsPicker setShowsSelectionIndicator:YES]; 

//Add the picker to the alert controller 
[alert.view addSubview:regionsPicker]; 

//make the toolbar view 
UIView *toolView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 270.0f, 44.f)]; 
toolView.backgroundColor = [UIColor blackColor]; //set it's background 


//add buttons to the view 
CGRect buttonFrame = CGRectMake(0, 5, 100, 30); //size & position of the button as placed on the toolView 
//make the cancel button & set the title 
UIButton *button = [[UIButton alloc] initWithFrame: buttonFrame]; 
[button setTitle: @"Cancel" forState: UIControlStateNormal]; 
[button setTitleColor: [UIColor blueColor] forState: UIControlStateNormal]; //make the color blue to keep the same look as prev version 
[toolView addSubview:button]; //add to the subview 

//Add the tartget 
[button addTarget: self 
      action: @selector(cancelRegionSet) 
forControlEvents: UIControlEventTouchDown]; 

//do the same for the select button 
buttonFrame = CGRectMake(90, 5, 100, 30); 
UIButton *selButton = [[UIButton alloc] initWithFrame:buttonFrame]; 
[selButton setTitle:@"Select" forState:UIControlStateNormal]; 
[selButton setTitleColor:[UIColor blueColor] forState:UIControlStateNormal]; 
[toolView addSubview:selButton]; 

[selButton addTarget: self 
       action: @selector(dismissRegionSet:) 
forControlEvents: UIControlEventTouchDown]; 

//add the toolbar to the alert controller 
[alert.view addSubview:toolView]; 

[self presentViewController:alert animated:NO completion:nil]; 

Answer 6

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

closePicker = [[UISegmentedControl alloc] initWithItems:[NSArray arrayWithObject:@"Cancel"]]; 
closePicker.momentary = YES; 
closePicker.frame = CGRectMake(25, 0.0f, 50.0f, 30.0f); 
closePicker.segmentedControlStyle = UISegmentedControlStyleBar; 
closePicker.tintColor = [UIColor blackColor]; 
[closePicker addTarget:self action:@selector(dismissActionSheet:) forControlEvents:UIControlEventValueChanged]; 
[alertController.view addSubview:closePicker]; 


UIPickerView *pickerFiliter=[[UIPickerView alloc]init]; 
pickerFiliter = [[UIPickerView alloc] initWithFrame:CGRectMake(0.0, 40.0, 320.0, 120.0)]; 
pickerFiliter.showsSelectionIndicator = YES; 
pickerFiliter.dataSource = self; 
pickerFiliter.delegate = self; 

[alertController.view addSubview:pickerFiliter]; 


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


- (IBAction)dismissActionSheet:(id)sender 
{ 

    [alertController dismissViewControllerAnimated:YES completion:nil]; 

} 

Answer 7

您可以通过使用Objective-C的iOS中添加8像机械手UIActionSheet： -

colorArray = [[NSMutableArray alloc ]initWithObjects:@"One", @"Two", @"Three", @"Four", @"Five", nil]; 
picker = [[UIPickerView alloc]init]; 
picker.frame = CGRectMake(0.0, 44.0,self.view.frame.size.width, 216.0); 
picker.dataSource = self; 
picker.delegate = self; 
picker.showsSelectionIndicator = true; 
picker.backgroundColor = [UIColor whiteColor]; 

UIToolbar* pickerDateToolbar = [[UIToolbar alloc] initWithFrame: CGRectMake(0, 0, 320, 44)]; //(frame: CGRectMake(0, 0, 320, 44)) 
pickerDateToolbar.barStyle = UIBarStyleBlackTranslucent;//UIBarStyle.Black 
pickerDateToolbar.barTintColor = [UIColor whiteColor]; 
pickerDateToolbar.translucent = true; 
actionView.backgroundColor = [UIColor whiteColor]; 


UILabel* label = [[UILabel alloc] initWithFrame:CGRectMake(150, 5, 150, 20)]; 
label.backgroundColor = [UIColor clearColor]; 
label.textColor = [UIColor blackColor]; 
label.shadowColor = [UIColor blackColor]; 
label.shadowOffset = CGSizeMake(0, 1); 
label.font = [UIFont systemFontOfSize:15];//[UIFont boldSystemFontOfSize:15]; 
label.text = @"Select a Status"; 
UIBarButtonItem *labeltext= [[UIBarButtonItem alloc] initWithCustomView:label]; 


UIBarButtonItem *cancelBtn = [[UIBarButtonItem alloc] initWithTitle:@"Cancel" style:UIBarButtonItemStylePlain target:self action:@selector(cancel_clicked:)]; 

UIBarButtonItem *flexSpace = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:nil action:nil]; 

UIBarButtonItem *doneBtn = [[UIBarButtonItem alloc] initWithTitle:@"Done" style:UIBarButtonItemStylePlain target:self action:@selector(done_clicked:)]; 

pickerDateToolbar.items = [[NSArray alloc] initWithObjects:cancelBtn,flexSpace,labeltext,doneBtn,nil]; 

cancelBtn.tintColor = [UIColor blueColor]; 
doneBtn.tintColor = [UIColor blueColor]; 

[actionView addSubview:pickerDateToolbar]; 
[actionView addSubview:picker]; 

if (window != nil) { 
[window addSubview:actionView]; 
} 
else 
{ 
[self.view addSubview:actionView]; 
} 

[UIView animateWithDuration:(0.2) animations:^{ 
actionView.frame = CGRectMake(0, self.view.frame.size.height - 260.0, self.view.frame.size.width, 260.0); 
self.view.alpha = 0.5; 
actionView.alpha = 1; 
}]; 

在viewDidLoad中添加此，

UIApplication * delegate = [UIApplication sharedApplication]; 
UIWindow *myWindow = delegate.keyWindow; 
NSArray *myWindow2 = delegate.windows; 

if(myWindow == [UIApplication sharedApplication].keyWindow) 
window = myWindow; 
else 
window = myWindow2[0]; 

actionView = [[UIView alloc]initWithFrame:CGRectMake(0, UIScreen.mainScreen.bounds.size.height, UIScreen.mainScreen.bounds.size.width, 240.0)]; 

//这是在弹出窗口中显示选取器时，创建ActionView和褪色背景。

-(void)cancel_clicked:(id)sender{ 
NSLog(@"cancel clicked"); 
[UIView animateWithDuration:0.2 animations:^{ 
actionView.frame = CGRectMake(0, UIScreen.mainScreen.bounds.size.height - 260.0, UIScreen.mainScreen.bounds.size.width, 260.0); 
} completion:^(BOOL finished) { 
self.view.alpha = 1; 
[actionView removeFromSuperview]; 
}]; 

}

//取消按钮单击方法。

-(void)done_clicked:(id)sender{ 
NSLog(@"done clicked"); 
self.view.userInteractionEnabled = TRUE; 

[UIView animateWithDuration:0.2 animations:^{ 
actionView.frame = CGRectMake(0, UIScreen.mainScreen.bounds.size.height - 260.0, UIScreen.mainScreen.bounds.size.width, 260.0); 
} completion:^(BOOL finished) { 
_permitStatus.text = [colorArray objectAtIndex:[picker selectedRowInComponent:0]]; 
self.view.alpha = 1; 
[actionView removeFromSuperview]; 
}]; 

}

//对于完成按钮点击。

Answer 8

可以使用类似的代码在iOS8上/斯威夫特自己的控件添加到，在屏幕中间弹出一个警告（而不是一个动作片）。

我用alert.addSubView做这件事的唯一问题是警报视图只根据您通过类方法添加的控件来自行调整大小。您必须添加自己的约束，以确保警报包含所有控件。

我添加了一个例子这里还是原来的问题问警报ActionSheet

func addAlert(){ 

    // create the alert 
    let title = "This is the title" 
    let message = "This is the message" 
    var alert = UIAlertController(title: title, message: message, preferredStyle: UIAlertControllerStyle.Alert); 
    alert.modalInPopover = true; 

    // add an action button 
    let nextAction: UIAlertAction = UIAlertAction(title: "Action", style: .Default){action->Void in 
     // do something 
    } 
    alert.addAction(nextAction) 

    // now create our custom view - we are using a container view which can contain other views 
    let containerViewWidth = 250 
    let containerViewHeight = 120 
    var containerFrame = CGRectMake(10, 70, CGFloat(containerViewWidth), CGFloat(containerViewHeight)); 
    var containerView: UIView = UIView(frame: containerFrame); 

    alert.view.addSubview(containerView) 

    // now add some constraints to make sure that the alert resizes itself 
    var cons:NSLayoutConstraint = NSLayoutConstraint(item: alert.view, attribute: NSLayoutAttribute.Height, relatedBy: NSLayoutRelation.GreaterThanOrEqual, toItem: containerView, attribute: NSLayoutAttribute.Height, multiplier: 1.00, constant: 130) 

    alert.view.addConstraint(cons) 

    var cons2:NSLayoutConstraint = NSLayoutConstraint(item: alert.view, attribute: NSLayoutAttribute.Width, relatedBy: NSLayoutRelation.GreaterThanOrEqual, toItem: containerView, attribute: NSLayoutAttribute.Width, multiplier: 1.00, constant: 20) 

    alert.view.addConstraint(cons2) 

    // present with our view controller 
    presentViewController(alert, animated: true, completion: nil) 

} 

Answer 9

雨燕2.0：

做一个样品pickerview或段查看并将其添加为uialercontroller的子视图。实现uipickerview委托并呈现uialertcontroller。这是我如何实现的。

class ViewController: 

    UIViewController,UIPickerViewDataSource,UIPickerViewDelegate { 

    var samplePicker: UIPickerView = UIPickerView() 
    var sampleSegment:UISegmentedControl = UISegmentedControl() 
    var alertController:UIAlertController = UIAlertController() 
    var buildings:[String] = ["BankBuilding", "Cinema" , "CornerShop", "Greg's House","14th Street"] 

    override func viewDidLoad() { 
     super.viewDidLoad() 

     samplePicker = UIPickerView(frame: CGRectMake(10.0, 40.0, 250, 150)) 
     samplePicker.delegate = self; 
     samplePicker.dataSource = self; 
     samplePicker.showsSelectionIndicator = true 
     samplePicker.tintColor = UIColor.redColor() 
     samplePicker.reloadAllComponents() 


     sampleSegment = UISegmentedControl(items: NSArray(object: " Dismiss ") as [AnyObject]) 
     sampleSegment.momentary = true 
     sampleSegment.frame = CGRectMake(25, 10.0, 100.0, 30.0) 
     sampleSegment.tintColor = UIColor.blackColor() 
     sampleSegment.backgroundColor = UIColor.orangeColor() 
     sampleSegment.addTarget(self, action: "dismissAlert", forControlEvents: UIControlEvents.ValueChanged) 

    } 
    func numberOfComponentsInPickerView(pickerView: UIPickerView) -> Int { 

     return 1 
    } 

    func pickerView(pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int { 
     return 3 
    } 

    func pickerView(pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? { 

     return buildings[row] as String 
    } 

    func pickerView(pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) { 
     print(buildings[0]) 

    } 
    func pickerView(pickerView: UIPickerView, rowHeightForComponent component: Int) -> CGFloat { 
     return 36.0 
    } 
    override func viewDidAppear(animated: Bool) 
    { 
     alertController = UIAlertController(title: " \n\n\n\n\n\n\n\n\n\n", message: "", preferredStyle: UIAlertControllerStyle.Alert) 

     alertController.view.addSubview(sampleSegment) 
     alertController.view.addSubview(samplePicker) 

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

    } 
    func dismissAlert() 
    { 
     alertController.dismissViewControllerAnimated(true, completion: nil) 
    } 
    override func didReceiveMemoryWarning() { 
     super.didReceiveMemoryWarning() 

    } 
    } 

Answer 10

雨燕3.0：

func showPickerInActionSheet() { 

    let title = "" 
    let message = "\n\n\n\n\n\n\n\n\n\n"; 
    let alert = UIAlertController(title: title, message: message, preferredStyle: UIAlertControllerStyle.actionSheet); 
    alert.isModalInPopover = true; 


    //Create a frame (placeholder/wrapper) for the picker and then create the picker 
    let pickerFrame = CGRect(x: 17, y: 52, width: 270, height: 100) 
    let picker: UIPickerView = UIPickerView(frame: pickerFrame) 


    //set the pickers datasource and delegate 
    picker.delegate = self 
    picker.dataSource = self 

    //Add the picker to the alert controller 
    alert.view.addSubview(picker) 

    //Create the toolbar view - the view witch will hold our 2 buttons 
    let toolFrame = CGRect(x: 17, y: 5, width: 270, height: 45) 
    let toolView: UIView = UIView(frame: toolFrame) 


    //add buttons to the view 
    let buttonCancelFrame = CGRect(x: 0, y: 7, width: 100, height: 30) //size & position of the button as placed on the toolView 

    //Create the cancel button & set its title 
    let buttonCancel: UIButton = UIButton(frame: buttonCancelFrame); 
    buttonCancel.setTitle("Cancel", for: .normal) 
    buttonCancel.setTitleColor(UIColor.blue, for: .normal) 
    toolView.addSubview(buttonCancel); //add it to the toolView 

    //Add the target - target, function to call, the event witch will trigger the function call 
    buttonCancel.addTarget(self, action: Selector("cancelSelection:"), for: UIControlEvents.touchDown); 


    //add buttons to the view 

    let buttonOkFrame = CGRect(x: 170, y: 7, width: 100, height: 30)//size & position of the button as placed on the toolView 

    //Create the Select button & set the title 
    let buttonOk: UIButton = UIButton(frame: buttonOkFrame); 
    buttonOk.setTitle("Select", for: UIControlState.normal); 
    buttonOk.setTitleColor(UIColor.blue, for: UIControlState.normal); 
    toolView.addSubview(buttonOk); //add to the subview 

    buttonOk.addTarget(self, action: #selector(HomeViewController.saveDelayTime), for: UIControlEvents.touchDown); 

    //add the toolbar to the alert controller 
    alert.view.addSubview(toolView); 

    self.present(alert, animated: true, completion: nil); 
} 

func saveProfile(sender: UIButton){ 
    // Your code when select button is tapped 

} 

func saveUser(sender: UIButton){ 
    // Your code when select button is tapped 
} 

func cancelSelection(sender: UIButton){ 
    self.dismiss(animated: true, completion: nil) 

    // We dismiss the alert. Here you can add your additional code to execute when cancel is pressed 
} 

// returns number of rows in each component.. 
func numberOfComponents(in pickerView: UIPickerView) -> Int{ 
    return 1 
} 

func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int { 
    return 60 
} 

// Return the title of each row in your picker ... In my case that will be the profile name or the username string 
func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? { 
    return "\(row)" 

} 

func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) { 
    selectedTime = row 
} 

func saveDelayTime() { 
    self.dismiss(animated: true, completion: nil) 
    UserDefaults.standard.set(selectedTime, forKey: "DelayTimeKey") 
    let _ = UserDefaults.standard.synchronize() 
}