UIAlertView

- (IBAction)AlertView:(id)sender {
   
    UIAlertView *alerview=[[UIAlertView alloc]initWithTitle:@"提示" message:@"这是一个警告框" delegate:self cancelButtonTitle:@"取消" otherButtonTitles:@"确定", nil];
   
//    [alerview addButtonWithTitle:@"不确定"];//动态添加子按钮
 
    NSLog(@"%d",alerview.visible);//是否可见
    NSLog(@"%d",alerview.numberOfButtons);//警告框的子按钮的个数
    NSLog(@"%@",[alerview buttonTitleAtIndex:0]);//指定索引的按钮的标题
   
    /**
     * UIAlertViewStyleDefault         基本样式
     *UIAlertViewStyleSecureTextInput  带一个密文输入框
     *UIAlertViewStylePlainTextInput   带一个明文输入框
     *UIAlertViewStyleLoginAndPasswordInput  带有明文+密文样式输入框的警告框

     */
    alerview.alertViewStyle=UIAlertViewStyleLoginAndPasswordInput;
   
    UITextField *loginTF=[alerview textFieldAtIndex:0];//获取登陆的输入框
    UITextField *password=[alerview textFieldAtIndex:1];//密码的输入框
   
    loginTF.placeholder=@"账号";
    password.placeholder=@"密码";
   
   
    [alerview show];
}

-(void)alertView:(UIAlertView *)alertView didDismissWithButtonIndex:(NSInteger)buttonIndex
{
//NSLog(@"警示框已经移除");

}
-(void)alertView:(UIAlertView *)alertView willDismissWithButtonIndex:(NSInteger)buttonIndex
{
//    NSLog(@"警示框将要移除");
}
//根据参数buttonIndex来判断点击事件
-(void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{
   
    switch (buttonIndex) {
        case 0:
        {
            NSLog(@"取消");
            break;
        }
           case 1:
        {
            NSLog(@"确定");

            break;
           
        }
            case 2:
        {
            NSLog(@"3");

            break;
        }
            case 3:
        {
            NSLog(@"4");

            break;
        }
        default:
            break;
    }
}
//按钮组