Question

目前，当点击按钮时，会出现UIModalPresentationSheet。当它向上滑动时，我想在它的顶部添加一个导航栏。我尝试过很多东西，但似乎没什么用。这是我正在尝试的内容，它会返回此错误。

    AthleteAdd *addAthlete = [self.storyboard instantiateViewControllerWithIdentifier:@"addAthlete"];
    UINavigationController *navigationController = [[UINavigationController alloc] initWithRootViewController:addAthlete];
    //[self.navigationController pushViewController:addAthlete animated:YES];

    addAthlete.delegate = self;
    addAthlete.modalPresentationStyle = UIModalPresentationFormSheet;
  //  UINavigationController *navController = [[UINavigationController alloc] initWithRootViewController:addAthlete];
    [self presentViewController:navigationController animated:YES completion:nil];

但它以模态方式推动它，并且没有modalpresentationsheet形式。如何才能使导航控制器的尺寸正确？

Answer 1

尝试更改您的代码：

    AthleteAdd *addAthlete = [self.storyboard instantiateViewControllerWithIdentifier:@"addAthlete"];
    UINavigationController *navigationController = [[UINavigationController alloc] initWithRootViewController:addAthlete];

    addAthlete.delegate = self;
    navigationController.modalPresentationStyle = UIModalPresentationFormSheet;


    [self presentViewController:navigationController animated:YES completion:nil];

因为在这里，您尝试从自身呈现addAthlete。所以你得到这个错误。

Answer 2

您应该展示您在其中包含addAthlete的navigationController。

[self presentViewController:navigationController animated:YES completion:nil];

Answer 3

您将从当前的viewcontroller本身进行演示。

尝试类似的事情，

[self dismissViewControllerAnimated:YES completion:^{
   [self.parentViewController presentViewController: navigationController animated:YES completion:nil];
}];

模态视图中的导航控制器

3 个答案: