iOS中UIAlertView的使用方法

    UIAlertView * alertView=[[UIAlertView alloc]initWithTitle:nil

                                                  message:@"真的要退出？"

                                                 delegate:self

                                        cancelButtonTitle:@"确定"

                                        otherButtonTitles:@"取消", nil];

    alertView.tag=11;

    [alertView show];

UIAlertViewDelegate的代理方法

-(void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex{

//执行的代码

2.3带输入框的Alert

//登陆弹出框：一个文本输入框，一个密码框 
UIAlertView *alertView = [[UIAlertView alloc] 
                              initWithTitle:@"Password" message:@"Please enter your credentials" delegate:self 
                              cancelButtonTitle:@"Cancel" otherButtonTitles:@"OK", nil]; 
//设置AlertView的样式 
[alertView setAlertViewStyle:UIAlertViewStyleLoginAndPasswordInput]; 
[alertView show]; 

//登陆弹出框：一个文本输入框，一个密码框
UIAlertView *alertView = [[UIAlertView alloc]
                              initWithTitle:@"Password" message:@"Please enter your credentials" delegate:self
                              cancelButtonTitle:@"Cancel" otherButtonTitles:@"OK", nil];
//设置AlertView的样式
[alertView setAlertViewStyle:UIAlertViewStyleLoginAndPasswordInput];
[alertView show];

iOS中UIAlertView的使用方法

原文：http://blog.csdn.net/yangchen9931/article/details/44955407