首先，视图控制器必须得实现协议UIAlertViewDelegate中的方法，并指定delegate为self，才能使弹出的Alert窗口响应点击事件。

具体代码如下：

 

ViewController.h中的代码如下：

 

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController<UIAlertViewDelegate>

@end

 

 

ViewController.m中的详细代码：

 

               - (void)viewDidLoad          {              [super viewDidLoad];              // Do any additional setup after loading the view from its nib                            //初始化AlertView              UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"AlertViewTest"                                                             message:@"message"                                                            delegate:self                                                   cancelButtonTitle:@"Cancel"                                                   otherButtonTitles:@"OtherBtn",nil];              //设置标题与信息，通常在使用frame初始化AlertView时使用              alert.title = @"AlertViewTitle";              alert.message = @"AlertViewMessage";                            //这个属性继承自UIView，当一个视图中有多个AlertView时，可以用这个属性来区分              alert.tag = 0;              //只读属性，看AlertView是否可见              NSLog(@"%d",alert.visible);              //通过给定标题添加按钮              [alert addButtonWithTitle:@"addButton"];              //按钮总数              NSLog(@"number Of Buttons :%d",alert.numberOfButtons);              //获取指定索引的按钮标题              NSLog(@"buttonTitleAtIndex1:%@",[alert buttonTitleAtIndex:1]);              NSLog(@"buttonTitleAtIndex2:%@",[alert buttonTitleAtIndex:2]);              //获取取消按钮的索引              NSLog(@"cancelButtonIndex:%d",alert.cancelButtonIndex);              //获取第一个其他按钮的索引              NSLog(@"firstOtherButtonIndex:%d",alert.firstOtherButtonIndex);              //显示AlertView              [alert show];              [alert release];          }                    #pragma marks -- UIAlertViewDelegate --          //根据被点击按钮的索引处理点击事件          -(void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex          {              NSLog(@"clickButtonAtIndex:%d",buttonIndex);          }                    //AlertView已经消失时执行的事件          -(void)alertView:(UIAlertView *)alertView didDismissWithButtonIndex:(NSInteger)buttonIndex          {              NSLog(@"didDismissWithButtonIndex");          }                    //ALertView即将消失时的事件          -(void)alertView:(UIAlertView *)alertView willDismissWithButtonIndex:(NSInteger)buttonIndex          {              NSLog(@"willDismissWithButtonIndex");          }                    //AlertView的取消按钮的事件          -(void)alertViewCancel:(UIAlertView *)alertView          {              NSLog(@"alertViewCancel");          }                    //AlertView已经显示时的事件          -(void)didPresentAlertView:(UIAlertView *)alertView          {              NSLog(@"didPresentAlertView");          }                    //AlertView即将显示时          -(void)willPresentAlertView:(UIAlertView *)alertView          {              NSLog(@"willPresentAlertView");          }                    - (void)viewDidUnload          {              [super viewDidUnload];              // Release any retained subviews of the main view.              // e.g. self.myOutlet = nil;          }
- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view from its nib

    //初始化AlertView
    UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"AlertViewTest"
                                                   message:@"message"
                                                  delegate:self
                                         cancelButtonTitle:@"Cancel"
                                         otherButtonTitles:@"OtherBtn",nil];
    //设置标题与信息，通常在使用frame初始化AlertView时使用
    alert.title = @"AlertViewTitle";
    alert.message = @"AlertViewMessage";

    //这个属性继承自UIView，当一个视图中有多个AlertView时，可以用这个属性来区分
    alert.tag = 0;
    //只读属性，看AlertView是否可见
    NSLog(@"%d",alert.visible);
    //通过给定标题添加按钮
    [alert addButtonWithTitle:@"addButton"];
    //按钮总数
    NSLog(@"number Of Buttons :%d",alert.numberOfButtons);
    //获取指定索引的按钮标题
    NSLog(@"buttonTitleAtIndex1:%@",[alert buttonTitleAtIndex:1]);
    NSLog(@"buttonTitleAtIndex2:%@",[alert buttonTitleAtIndex:2]);
    //获取取消按钮的索引
    NSLog(@"cancelButtonIndex:%d",alert.cancelButtonIndex);
    //获取第一个其他按钮的索引
    NSLog(@"firstOtherButtonIndex:%d",alert.firstOtherButtonIndex);
    //显示AlertView
    [alert show];
    [alert release];
}

#pragma marks -- UIAlertViewDelegate --
//根据被点击按钮的索引处理点击事件
-(void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{
    NSLog(@"clickButtonAtIndex:%d",buttonIndex);
}

//AlertView已经消失时执行的事件
-(void)alertView:(UIAlertView *)alertView didDismissWithButtonIndex:(NSInteger)buttonIndex
{
    NSLog(@"didDismissWithButtonIndex");
}

//ALertView即将消失时的事件
-(void)alertView:(UIAlertView *)alertView willDismissWithButtonIndex:(NSInteger)buttonIndex
{
    NSLog(@"willDismissWithButtonIndex");
}

//AlertView的取消按钮的事件
-(void)alertViewCancel:(UIAlertView *)alertView
{
    NSLog(@"alertViewCancel");
}

//AlertView已经显示时的事件
-(void)didPresentAlertView:(UIAlertView *)alertView
{
    NSLog(@"didPresentAlertView");
}

//AlertView即将显示时
-(void)willPresentAlertView:(UIAlertView *)alertView
{
    NSLog(@"willPresentAlertView");
}

- (void)viewDidUnload
{
    [super viewDidUnload];
    // Release any retained subviews of the main view.
    // e.g. self.myOutlet = nil;
}