iphone - 使用等待对话框导航到另一个 ViewController

Question

我正在尝试使用 MBProgressHUD 在我的应用程序中使用等待对话框.

我的应用程序中有一个按钮。当用户点击它时，我们导航到另一个 viewController:

UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"MainStoryboard" bundle:nil];
ViewController2 *yourViewController = (ViewController2 *)[storyboard instantiateViewControllerWithIdentifier:@"FavoritePage"];
[self.navigationController pushViewController:yourViewController animated:YES];

如您所知，它也可以从 interface builder 中设置。

问题是下一页加载需要一段时间，我想在此期间显示一个等待对话框:

- (IBAction)navigation:(id)sender {
    [MBProgressHUD showHUDAddedTo:self.view animated:YES];

    UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"MainStoryboard" bundle:nil];
    ViewController2 *yourViewController = (ViewController2 *)[storyboard instantiateViewControllerWithIdentifier:@"FavoritePage"];
    [self.navigationController pushViewController:yourViewController animated:YES];
}

但它不起作用。

当我删除与导航相关的代码时，只使用它:

[MBProgressHUD showHUDAddedTo:self.view animated:YES];

等待对话框出现，但是当我使用导航代码和这一行时，等待对话框不显示并且导航正常。

如何让它们协同工作？

只是想添加它来隐藏等待对话框，我也有这个:

- (void) viewDidDisappear:(BOOL)animated {
    [MBProgressHUD hideHUDForView:self.view animated:YES];
}

Answer 1

代替，

- (IBAction)navigation:(id)sender {
    [MBProgressHUD showHUDAddedTo:self.view animated:YES];

    UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"MainStoryboard" bundle:nil];
    ViewController2 *yourViewController = (ViewController2 *)[storyboard instantiateViewControllerWithIdentifier:@"FavoritePage"];
    [self.navigationController pushViewController:yourViewController animated:YES];
}

尝试，

- (IBAction)navigation:(id)sender {
    UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"MainStoryboard" bundle:nil];
    ViewController2 *yourViewController = (ViewController2 *)[storyboard instantiateViewControllerWithIdentifier:@"FavoritePage"];
    [self.navigationController pushViewController:yourViewController animated:YES];
    [MBProgressHUD showHUDAddedTo:self.navigationController.view  animated:YES];
}

否则，您需要在ViewController2 的viewWillAppear 方法中添加showHUDAddedTo 方法。