登录视图之前的模态视图屏幕

Question

我是一名新手ios开发人员，我对如何向登录页面添加视图有疑问。 目前，我有一个登录页面，我想做的是在登录页面可见之前，另一个模态视图应使用户必须先将其关闭。 如何在xcode中添加此内容？

Answer 1

这是呈现视图控制器的几个选项。

- (IBAction)goToLoginView:(id)sender
{
     //if you are using xibs use this line
     UIViewController *controller = [[UIViewController alloc] initWithNibName:@"myXib" bundle:[NSBundle mainBundle]];
     //if you are using storyboards use this line
     UIViewController *controller = [self.storyboard instantiateViewControllerWithIdentifier:@"myViewControllersID"];

     //to present the controller modally use this
     [self presentViewController:controller animated:YES completion:nil];
     //or if you are pushing to this controller using a navigation controller use this
     [self.navigationController pushViewController:controller animated:YES];
}

然后使用以下命令关闭视图控制器：

- (IBAction)closeMyController
{
    //if the view was presented modally close it with this
    [self dismissViewControllerAnimated:YES completion:nil];

    //and to pop back up the navigation stack
    [self.navigationController popToRootViewControllerAnimated:YES];
}