public MainPage()
{
InitializeComponent();
AlertCommand.Subscribe(() => DisplayAlert("タイトル", "メッセージ", "OK"));
ActionSheetCommand.Subscribe(() => DisplayActionSheet("選択してね", "キャンセル", "削除", "編集", "コピー", "貼り付け"));
PopupCommand.Subscribe(() => PopupNavigation.PushAsync(new PopUp(true, false)));
TransitionCommand.Subscribe(() => App.Current.MainPage = new PopUp(false, true));
}
private void ActionSheetExecute()
{
ActionSheetCommand?.Execute(this.DataContext);
}