UIALertView and UIActionSheet applications in iPhone development (1)

IPhone DevelopmentUnderstandingUIALertViewAndUIActionSheetThe application is the content to be learned in this article.UIALertViewAndUIActionSheetFirst, let's look at the details.

1: Build a simple warning box:

 
 

  
  
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"xingchen"  
  
  
message:@"message"  
  
  
       delegate:nil   
  
  
      cancelButtonTitle:@"OK"  
  
  
      otherButtonTitles:nil];  
  
  
[alert show];  
  
  
[alert release]; 
 
 

Here, it is just a button dialog box that runs in a modal form.

2: Of course, you can add multiple buttons in an alertView. The reference code is as follows:

 
 

  
  
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"xingchen"   
 
 

 
 

  
  
  message:@"message"  
  
  
  delegate:nil   
  
  
  cancelButtonTitle:@"OK"  
  
  
  otherButtonTitles:@"FirstButton",@"SecondButton",  
  
  
   nil];  
  
  
[alert show];  
  
  
[alert release]; 
 
 

3: Determine which button to click and trigger different events based on different buttons:

AlertView has a delegate (UIAlertViewDelegate), which can be inherited and then called to process events.

Reference Code

 
 

  
  
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"xingchen"   
  
  
           message:@"message" delegate:self   
  
  
           cancelButtonTitle:@"OK"        
  
  
           otherButtonTitles:@"FirstButton",  
  
  
           @"SecondButton",nil];  
  
  
[alert show];  
  
  
[alert release];  
  
  
//delegate   
  
  
-(void)alertView:(UIAlertView *)alertView  clickedButtonAtIndex:(int)index  
  
  
 
  
  
{  
  
  
        NSString *tt = [[NSString alloc] initWithFormat:@"%d",index];  
  
  
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"xingchen"  
  
  
message:tt  
  
  
  delegate:self   
  
  
  cancelButtonTitle:@"OK"  
  
  
  otherButtonTitles:nil];  
  
  
[alert show];  
  
  
[alert release];  
  
  
} 
 
 

4: manual cancellation dialog box

Reference code:

 
 

  
  
[alert dismissWithClickedButtonIndex:0 animated:YES];