我在基本抽象類中的導(dǎo)航方法public abstract void Navigate(SelectedItemChangedEventArgs e); '在我的一個(gè) View 類中，當(dāng)單擊或點(diǎn)擊某個(gè)按鈕時(shí)，我需要有多個(gè)導(dǎo)航。僅使用我的導(dǎo)航功能我可以用于一次導(dǎo)航我需要改進(jìn)導(dǎo)航方法以進(jìn)行改進(jìn)以便它可以用于多次導(dǎo)航。我在這里有點(diǎn)無能為力我應(yīng)該怎么做中繼命令或使用通用。為了將此方法用于多種導(dǎo)航目的，我需要更改什么 private void JournalSelected(object sender, SelectedItemChangedEventArgs e) { if (e?.SelectedItem == null) return; JournalGroupList.SelectedItem = null; Navigate(e); } public override async void Navigate(SelectedItemChangedEventArgs e) { JournalHistoryViewPage journalHistoryViewPage = App.Container.Resolve<JournalHistoryViewPage>(); journalHistoryViewPage.BaseViewModel.JournalGroup = e.SelectedItem as JournalGroup; journalHistoryViewPage.BaseViewModel.SelectedPatient = BaseViewModel.SelectedPatient; await Navigation.PushAsync(journalHistoryViewPage, true); } private async void VitalSigns_Tapped(object sender, System.EventArgs e) { var vitalSignsViewPage = App.Container.Resolve<VitalSignsViewPage>(); vitalSignsViewPage.BaseViewModel.SelectedPatient = BaseViewModel.SelectedPatient; await Navigation.PushAsync(vitalSignsViewPage, true); }因?yàn)槲以?journalselected 中使用了 Navigate Function，所以我也需要它用于 VitalSigns_tapped。在這里我覺得我復(fù)制了代碼并且沒有正確使用該方法
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慕桂英3389331
TA貢獻(xiàn)2036條經(jīng)驗(yàn) 獲得超8個(gè)贊
將頁面?zhèn)鬟f給Navigate function將使導(dǎo)航功能更加通用。下次您想導(dǎo)航新頁面時(shí)，只需將新頁面?zhèn)鬟f給它即可。
private void JournalSelected(object sender, SelectedItemChangedEventArgs e)
{
if (e?.SelectedItem == null) return;
JournalGroupList.SelectedItem = null;
JournalHistoryViewPage journalHistoryViewPage = App.Container.Resolve<JournalHistoryViewPage>();
journalHistoryViewPage.BaseViewModel.JournalGroup = e.SelectedItem as JournalGroup;
journalHistoryViewPage.BaseViewModel.SelectedPatient = BaseViewModel.SelectedPatient;
Navigate(journalHistoryViewPage);
}
private async void VitalSigns_Tapped(object sender, System.EventArgs e)
{
var vitalSignsViewPage = App.Container.Resolve<VitalSignsViewPage>();
vitalSignsViewPage.BaseViewModel.SelectedPatient = BaseViewModel.SelectedPatient;
Navigate(vitalSignsViewPage);
}
public override async void Navigate(Page page)
{
await Navigation.PushAsync(page, true);
}
如果每個(gè)頁面都有一個(gè)BaseViewModel.SelectedPatient和 具有相同的值，你也可以將它組合成 Navigate 函數(shù)，例如：
public override async void Navigate(Page page)
{
page.BaseViewModel.SelectedPatient = BaseViewModel.SelectedPatient;
await Navigation.PushAsync(page, true);
}
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