Existe-t-il un moyen d'ajouter UIPickerView dans UIAlertController (Alert ou ActionSheet) dans Swift?
Je suis totalement nouveau pour Swift (et la programmation iOS du tout), mais j'ai commencé à jouer avec (ce n'était pas une bonne idée quand tout est encore en version bêta: D). Donc J'ai essayé de le comprendre moi-même, mais toujours rien. J'ai même essayé d'ajouter une sous-vue contenant un sélecteur sans succès. Alors, quelqu'un peut-il m'aider?
Eh bien, c'est mon code final qui a fonctionné pour moi. C'est un mélange de quelques idées. Les principales raisons pour lesquelles j'accepterai ma réponse sont que mon code est en Swift, mon code utilise UIAlertController, mon code est pour le sélecteur. Je tiens à remercier Jageen - ma réponse est basée sur son idée.
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;
}
}
Vous pouvez utiliser un code similaire dans Dans iOS8/Swift pour ajouter vos propres contrôles dans une alerte (au lieu d'une feuille d'action) qui apparaît au milieu de l'écran.
Le seul problème que j'ai eu avec cette opération avec alert.addSubView était que la vue d'alerte ne se dimensionne que selon les contrôles que vous avez ajoutés via les méthodes de classe. Vous devez ensuite ajouter vos propres contraintes pour vous assurer que l'alerte englobe tous vos contrôles.
J'ai ajouté un exemple ici car la question d'origine demandait une alerte ou une feuille d'action
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)
}
Je devais faire la même chose et c'est ainsi que je l'ai résolu. J'ai fait quelque chose de similaire à Jageen. Mon code est ci-dessous. Notez que je mets des valeurs dans UIPickerView dans une autre partie du code.
//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];
Vous pouvez ajouter Picker comme UIActionSheet dans iOS 8 en utilisant Objective-C en: -
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;
}];
Dans ViewDidLoad ajoutez ceci,
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)];
// Il s'agit de créer ActionView et pour l'arrière-plan décoloré lorsque le sélecteur est affiché dans une fenêtre contextuelle.
-(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];
}];
}
// Méthode de clic sur le bouton Annuler.
-(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];
}];
}
// Cliquez sur le bouton Terminé.
Swift 4.1/Xcode 9.4.1/iOS 11.4
func addAlert(){
// create the alert
let title = "This is the title"
let message = "This is the message"
let alert = UIAlertController(title: title, message: message, preferredStyle: UIAlertControllerStyle.alert);
alert.isModalInPopover = 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
let containerFrame = CGRect(x:10, y: 70, width: CGFloat(containerViewWidth), height: CGFloat(containerViewHeight));
let containerView: UIView = UIView(frame: containerFrame);
alert.view.addSubview(containerView)
// now add some constraints to make sure that the alert resizes itself
let 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)
let 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
present(alert, animated: true, completion: nil)
}
Voici un projet github qui fait apparaître un UIDatePicker au centre de l'écran. Il n'utilise pas UIAlertController ou UIAlertView. Je ne pense pas que ce soit l'intention des classes d'alerte.
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];
}
Swift 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()
}
Swift 2.0:
Créez un exemple de vue de sélection ou de segment et ajoutez-le en tant que sous-vue de uialercontroller. Implémentez les délégués uipickerview et présentez le uialertcontroller. Voici comment j'ai réalisé la même chose.
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()
}
}