iPhone控件之UIAlertView

#import "UITestViewController.h"

NSTimer *timer;

@implementation UITestViewController

- (void)hideAlert:(NSTimer *)sender
{
    UIAlertView *alert = [sender userInfo];
    
    [alert dismissWithClickedButtonIndex:0 animated:YES];
}

- (void)viewDidLoad {
    
    [super viewDidLoad];
    
    UIAlertView *myAlert = [[UIAlertView alloc] initWithTitle:@"title" 
                                                      message:@"This alert will disappear in 3 seconds" 
                                                     delegate:self 
                                            cancelButtonTitle:@"OK" 
                                            otherButtonTitles:nil];
    
    [myAlert addButtonWithTitle:@"new button"];
    [myAlert addButtonWithTitle:@"another button"];
    
    [myAlert show];
    
    //create a timer to hide the alert automatically in 3 seconds
    timer = [[NSTimer scheduledTimerWithTimeInterval:3.0 target:self selector:@selector(hideAlert:) userInfo:myAlert repeats:NO] retain];
    
    [myAlert release];    
}