我在 App.xaml.cs 中添加了一个带有 3 个按钮的 appbar 以将其放在每个页面上,但我有一个页面,我想在其中添加另一个按钮。
我所做的是,我从 App.xaml.cs 中获得带有 3 个默认按钮的 appbar,然后添加我的另一个按钮。问题是当它被添加并且当我改变页面时,我添加的按钮保持可见......因此,这是对象引用的问题,因为每个页面都引用相同的应用栏。
我想知道是否可以只为带有 4 个按钮的页面复制此应用栏...(Icloneable?但我不知道如何:/)你怎么看?我还应该提到一些按钮使用导航转到另一个页面。
这是我的代码:
应用程序.xaml.cs
private ApplicationBar _appBar;
public ApplicationBar AppBar { get { return _appBar; } } //property called in other page
//Method called in the constructor
private void BuildLocalizedApplicationBar()
{
// Set the page's ApplicationBar to a new instance of ApplicationBar.
_appBar = new ApplicationBar();
// Create a new button and set the text value to the localized string from AppResources.
var appBarButtonScan = new ApplicationBarIconButton(new Uri("/Assets/AppBar/White/appbar.qr.png", UriKind.Relative));
appBarButtonScan.Click += AppBarButtonScanOnClick;
appBarButtonScan.Text = AppResources.Scan;
var appBarButtonSearch = new ApplicationBarIconButton(new Uri("/Assets/AppBar/White/appbar.search.png", UriKind.Relative));
appBarButtonSearch.Click += AppBarButtonSearchOnClick;
appBarButtonSearch.Text = AppResources.Search;
var appBarButtonFacebook = new ApplicationBarIconButton(new Uri("/Assets/AppBar/White/appbar.facebook.png", UriKind.Relative));
appBarButtonFacebook.Click += AppBarButtonFacebookOnClick;
appBarButtonFacebook.Text = AppResources.MyAccount;
_appBar.Buttons.Add(appBarButtonScan);
_appBar.Buttons.Add(appBarButtonSearch);
_appBar.Buttons.Add(appBarButtonFacebook);
// Create a new menu item with the localized string from AppResources.
ApplicationBarMenuItem appBarMenuSettings = new ApplicationBarMenuItem(AppResources.SettingsTitle);
_appBar.MenuItems.Add(appBarMenuSettings);
}
在我想要另外一个按钮的页面中:
private void BuildLocalizedApplicationBar()
{
App _app = Application.Current as App; //in my page, it's an attribute that I initialize in my constructor.
ApplicationBar = _app.AppBar; //get the appbar with 3 buttons from App.xaml.cs
// Create new buttons and set the text value to the localized string from AppResources.
ApplicationBarIconButton appBarButtonTagPlace = new ApplicationBarIconButton(new Uri("/Assets/AppBar/White/appbar.heart.outline.png", UriKind.Relative));
appBarButtonTagPlace.Text = AppResources.TagThisPlaceTitle;
appBarButtonTagPlace.Click += AppBarButtonTagPlaceOnClick;
ApplicationBar.Buttons.Add(appBarButtonTagPlace);
}
先感谢您