, wie man hinzufügen Schaltfläche in UIAlertController In IOS 9

Question

, wie wir UIAlertView in iOS verwenden 9 und wie Schaltfläche hinzufügen in UIAlertController

UIAlertController * alert=[UIAlertController 

alertControllerWithTitle:@"Title" message:@"Message"preferredStyle:UIAlertControllerStyleAlert]; 

UIAlertAction* yesButton = [UIAlertAction 
         actionWithTitle:@"Yes, please" 
         style:UIAlertActionStyleDefault 
         handler:^(UIAlertAction * action) 
         { 
          **//What we write here????????** 


         }]; 
UIAlertAction* noButton = [UIAlertAction 
          actionWithTitle:@"No, thanks" 
          style:UIAlertActionStyleDefault 
          handler:^(UIAlertAction * action) 
          { 
           **//What we write here????????** 

          }]; 

[alert addAction:yesButton]; 
[alert addAction:noButton]; 

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

Answer 1

UIAlertController * alert=[UIAlertController alertControllerWithTitle:@"Title" 
                   message:@"Message" 
                 preferredStyle:UIAlertControllerStyleAlert]; 

UIAlertAction* yesButton = [UIAlertAction actionWithTitle:@"Yes, please" 
                style:UIAlertActionStyleDefault 
                handler:^(UIAlertAction * action) 
{ 
    /** What we write here???????? **/ 
    NSLog(@"you pressed Yes, please button"); 

    // call method whatever u need 
}]; 

UIAlertAction* noButton = [UIAlertAction actionWithTitle:@"No, thanks" 
                style:UIAlertActionStyleDefault 
                handler:^(UIAlertAction * action) 
{ 
    /** What we write here???????? **/ 
    NSLog(@"you pressed No, thanks button"); 
    // call method whatever u need 
}]; 

[alert addAction:yesButton]; 
[alert addAction:noButton]; 

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

swift

let alert = UIAlertController(title: "Title", message: "Message", preferredStyle: .alert) 
    let yesButton = UIAlertAction(title: "Yes, please", style: .default, handler: {(_ action: UIAlertAction) -> Void in 
     /** What we write here???????? **/ 
     print("you pressed Yes, please button") 
     // call method whatever u need 
    }) 
    let noButton = UIAlertAction(title: "No, thanks", style: .default, handler: {(_ action: UIAlertAction) -> Void in 
     /** What we write here???????? **/ 
     print("you pressed No, thanks button") 
     // call method whatever u need 
    }) 
    alert.addAction(yesButton) 
    alert.addAction(noButton) 
    present(alert, animated: true) { _ in } 

Answer 2

Sie müssen tatsächlich schreibe den Code nach dem OK und den Abbrechen-Button in den jeweiligen Fertigstellungsblöcken.

UIAlertController * alert=[UIAlertController 

alertControllerWithTitle:@"Title" message:@"Message"preferredStyle:UIAlertControllerStyleAlert]; 

    UIAlertAction* yesButton = [UIAlertAction 
         actionWithTitle:@"Yes, please" 
         style:UIAlertActionStyleDefault 
         handler:^(UIAlertAction * action) 
         { 
          [self okButtonPressed]; 

         }]; 
    UIAlertAction* noButton = [UIAlertAction 
          actionWithTitle:@"No, thanks" 
          style:UIAlertActionStyleDefault 
          handler:^(UIAlertAction * action) 
          { 
           [self cancelButtonPressed]; 

          }]; 

    [alert addAction:yesButton]; 
    [alert addAction:noButton]; 

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


- (void)cancelButtonPressed{ 
    // write your implementation for cancel button here. 
} 

- (void)okButtonPressed{ 
    //write your implementation for ok button here 
} 

Answer 3

Sie können nur diese Blöcke nil lassen, wenn Sie keine weiteren Aktionen nach dem Button Klopfen nicht benötigt werden:

UIAlertAction* yesButton = [UIAlertAction 
         actionWithTitle:@"Yes, please" 
         style:UIAlertActionStyleDefault 
         handler:nil];