问题
I'm totally new to swift (and iOS programming at all), but I started messing around with it (it wasn't a good idea when everything is still beta version :D). So I tried to figure it out by myself, but still nothing. Even tried to add subview containing picker without any success. So can any one help me?
回答1:
Well this is my final code which worked for me. It is a mix by a few ideas. The main reasons that I will accept my answer is that my code is in Swift, my code uses UIAlertController, my code is for picker. I want to thank to Jageen - my answer is based on his idea.
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;
}
}
回答2:
Try this I done some trick...
Below code is working for me in iPod iOS8beta5 + XCode6
I add UIActivityIndicatorView control in UIAlertController in objective-c.
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];
Note :
It's in objective-c but by this it's prove that we can also do this using swift.
回答3:
You can use similar code in In iOS8 / Swift to add your own controls into an alert (instead of an action sheet) that pops up in the middle of the screen.
The only problem I had with doing this with alert.addSubView was that the alert view only sizes itself according to the controls you have added through the class methods. You have to then add your own constraints to make sure that the alert encompasses all your controls.
I've added an example here as the original question asked for Alert or 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)
}
回答4:
I needed to do the same thing and this is how I resolved it. I did something similar to Jageen. My code is below. Note that I put values in the UIPickerView in a different part of the 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];
回答5:
I think it is not bad idea to start from beta.
You need custom UIAlertView. Pay attention to UIAlertController it's available only in iOS 8.0.
Look there and there
回答6:
You can add Picker like UIActionSheet in iOS 8 using Objective-C by:-
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;
}];
In ViewDidLoad add this,
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)];
// This is to Create ActionView and for faded background when picker is displayed in popup.
-(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];
}];
}
// Cancel Button Click Method.
-(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];
}];
}
// For Done Button Click.
回答7:
Here is a github project that pops up a UIDatePicker in the center of the screen. It does not use UIAlertController or UIAlertView. I don't think that's the intent of the alert classes.
回答8:
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];
}
回答9:
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)
}
回答10:
Swift 2.0:
Make a sample pickerview or segment view and add it as uialercontroller's subview. Implement uipickerview delegates and present the uialertcontroller. Here is how I achieved the same.
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()
}
}
回答11:
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()
}
来源：https://stackoverflow.com/questions/25545982/is-there-any-way-to-add-uipickerview-into-uialertcontroller-alert-or-actionshee