使用UIAlertView在ViewControllers之间导航

Question

我正在尝试根据用户的选择更改视图控制器UIAlertView.我是客观的新手,遇到了麻烦.

当用户按下"我已完成"时,我希望应用程序导航回上一个视图控制器.当用户按下"记分板"时,我希望应用程序导航到下一个视图控制器.

UIAlertView *jigsawCompleteAlert = [[UIAlertView alloc]   //show alert box with option to play or exit
                                  initWithTitle: @"Congratulations!" 
                                  message:completedMessage 
                                  delegate:self 
                                  cancelButtonTitle:@"I'm done" 
                                  otherButtonTitles:@"Play again", @"Scoreboard",nil];
            [jigsawCompleteAlert show];

- (void)alertView:(UIAlertView *)alertView didDismissWithButtonIndex:(NSInteger)buttonIndex {
    if (buttonIndex == 0) {
        NSLog(@"Cancel Tapped.");
        [self.navigationController popViewControllerAnimated:YES];

    }
    else if (buttonIndex == 1) {
        NSLog(@"GO tapped.");
        startDate = [NSDate date];
        // Create the stop watch timer that fires every 10 ms
        stopWatchTimer = [NSTimer 
                          scheduledTimerWithTimeInterval:1.0/10.0
                          target:self
                          selector:@selector(updateTimer)
                          userInfo:nil
                          repeats:YES];
    } else if (buttonIndex == 2) {
        NSLog(@"Scoreboard tapped.");
    }

}

popView部分正在运行,应用程序导航回一个视图控制器.我不知道如何让应用程序向前移动一个视图控制器.我知道这与此有关,pushViewController但我只看到了相当古老而矛盾的文章,详细说明了如何做到这一点.

谢谢,我对此表示感谢.

Answer 1

您需要创建新的UIViewController,然后将其推送到堆栈,如下所示:

else if (buttonIndex == 2) {
    NSLog(@"Scoreboard tapped.");
    MoreDetailViewController *ctrl = [[MoreDetailViewController alloc] initWithNibName:@"MoreDetailViewController" bundle:nil];

    [self.navigationController pushViewController:ctrl animated:YES];
}    

如果您正在使用StoryBoard,则在storyboard文件(Attribute Inspector)中为您的UIViewController提供标识符.

将此代码放入处理程序:

MoreDetailViewController *vc = [self.storyboard instantiateViewControllerWithIdentifier:@"MoreDetailViewController"];
[self.navigationController pushViewController:vc animated:YES];