How to use UIAlertController to replace UIActionSheet?

Question

I am maintaining an old iOS project which based on SDK 6.0.

A method on this project called

-(void) showComboBox:(UIView*)view:withOptions:(NSDictionary*)options

is used to show a combo box. To achieve the goal, it used UIActionSheet, which is deprecated on iOS8.

My solution is like this:

        if (floor(NSFoundationVersionNumber) > NSFoundationVersionNumber10_8) {         UIAlertController* alertController = [UIAlertController             alertControllerWithTitle:@"title"             message:@"message"             preferredStyle:UIAlertControllerStyleActionSheet];          UIAlertAction* item = [UIAlertAction actionWithTitle:@"item"             style:UIAlertActionStyleDefault             handler:^(UIAlertAction *action) {             //do something here              //inform the selection to the WebView              ...             [alertController dismissViewControllerAnimated:YES completion:nil];         }];          UIAlertAction* cancelAction = [UIAlertAction actionWithTitle:@"Cancel" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action) {             [alertController dismissViewControllerAnimated:YES completion:nil];         }];          [alertController addAction:item];         [alertController addAction:cancelAction];         //I am not sure whether it's the right way         if ([view.nextResponder isKindOfClass:UIViewController.class]) {             UIViewController* vc = (UIViewController*)view.nextResponder;             [vc presentViewController:alertController animated:YES completion:nil];         } 

Is that a proper solution?

This is what I mostly concern about: UIAlertController needs to be added to a UIViewController but I can only get the pointer of the UIView, so I used view.nextResponder to get what I want, but it's that a good way?

Answer 1

I have used following code to show action sheet using UIAlertViewController and it works perfect.

Swift

let alert = UIAlertController(title: "Action Title", message: "Action Message", preferredStyle: .actionSheet) let action = UIAlertAction(title: "Item", style: .default) {     UIAlertAction in     // Write your code here } alert.addAction(action)  let cancelAction = UIAlertAction(title: "Cancel", style: .cancel) {     UIAlertAction in     // It will dismiss action sheet } alert.addAction(cancelAction) self.present(alert, animated: true, completion: nil) 

Objective C

- (IBAction)buttonClicked:(id)sender {      UIAlertController *actionSheet = [UIAlertController alertControllerWithTitle:@"Action Sheet" message:@"Using the alert controller" preferredStyle:UIAlertControllerStyleActionSheet];      [actionSheet addAction:[UIAlertAction actionWithTitle:@"Cancel" style:UIAlertActionStyleCancel handler:^(UIAlertAction *action) {          // Cancel button tappped.         [self dismissViewControllerAnimated:YES completion:^{         }];     }]];      [actionSheet addAction:[UIAlertAction actionWithTitle:@"Delete" style:UIAlertActionStyleDestructive handler:^(UIAlertAction *action) {          // Distructive button tapped.         [self dismissViewControllerAnimated:YES completion:^{         }];     }]];      [actionSheet addAction:[UIAlertAction actionWithTitle:@"OK" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action) {          // OK button tapped.          [self dismissViewControllerAnimated:YES completion:^{         }];     }]];      // Present action sheet.     [self presentViewController:actionSheet animated:YES completion:nil]; } 

Edit:

You need to get UIViewController object here. You can set global variable or call a delegate method, or you can use notification to get view controller object in this code.

and last line in above code will be like.

[self.viewController presentViewController:actionSheet animated:YES completion:nil]; 

self.viewController is a global variable which will be set before you actually get this view.

Because the approach you are following now using view.nextResponder. I'm afraid that it may not work.

Answer 2

I have used action sheet for changing profile picture. I followed Kampai approach, just removed dismissviewController call since it was kicking me out of a view when pressing Cancel or photo selection view

UIAlertController *actionSheet = [UIAlertController alertControllerWithTitle:nil message:nil preferredStyle:UIAlertControllerStyleActionSheet];  [actionSheet addAction:[UIAlertAction actionWithTitle:@"Cancel" style:UIAlertActionStyleCancel handler:^(UIAlertAction *action) {      // Cancel button tappped do nothing.  }]];  [actionSheet addAction:[UIAlertAction actionWithTitle:@"Take photo" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action) {      // take photo button tapped.     [self takePhoto];  }]];  [actionSheet addAction:[UIAlertAction actionWithTitle:@"Choose photo" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action) {      // choose photo button tapped.     [self choosePhoto];  }]];  [actionSheet addAction:[UIAlertAction actionWithTitle:@"Delete Photo" style:UIAlertActionStyleDestructive handler:^(UIAlertAction *action) {      // Distructive button tapped.     [self deletePhoto];  }]];