标签：message property hang ons 支持 logs creat can value
目前，BottomNavigationBarXF 好像不支持 CoordinatorLayout 布局(BottomNavigationBar是支持的)。可以用以下比较迂回的方法实现BottomBar的自动隐藏：
1、Touch响应。
以自定义WebView为例：
在HybridWebViewRenderer中添加方法：
//... protected override void OnElementChanged(ElementChangedEventArgs<HybridWebView> e) { base.OnElementChanged(e); if (Control == null) { //... } //... Control.Touch += Control_Touch; //... }
float _startEventY;
float _heightChange;
private void Control_Touch(object sender, TouchEventArgs e)
{
var ev = e.Event;
MotionEventActions action = ev.Action & MotionEventActions.Mask;
switch (action)
{
case MotionEventActions.Down:
_startEventY = ev.GetY();
_heightChange = 0;
break;
case MotionEventActions.Move:
float delta = (ev.GetY() + _heightChange) - _startEventY;
Element.TouchScroll(delta);
/*
var callDialog = new AlertDialog.Builder((Activity)Forms.Context);
callDialog.SetMessage(String.Format("scrolling delta is {0}, change {1}, start {2}", delta, _heightChange, _startEventY));
callDialog.SetNegativeButton("Cancel", delegate { });
callDialog.Show();
*/
break;
}
e.Handled = false;
}
//...
在HybridWebViewPage中：
//...
public HybridWebViewPage(Uri uri)
{
InitializeComponent();
//...
hybridWebView.TouchScroll += WebViewPage_TouchScroll;
}
//...
private void WebViewPage_TouchScroll(float moved)
{
if (moved < -60)
{
App.tabbedPage.BarHide?.Invoke(true);
}
else if (moved > 60)
{
App.tabbedPage.BarHide?.Invoke(false);
}
}
//...
2、添加BarHide属性：
BottomBarPage中添加BarHide：
public class BottomBarPage : TabbedPage { public enum BarThemeTypes { Light, DarkWithAlpha, DarkWithoutAlpha } public bool FixedMode { get; set; } public BarThemeTypes BarTheme { get; set; } /**/ public static BindableProperty BarHideProperty = BindableProperty.Create(nameof(BarHide), typeof(Action<bool>), typeof(BottomBarPage), null, BindingMode.OneWayToSource); public Action<bool> BarHide { get { return (Action<bool>)GetValue(BarHideProperty); } set { SetValue(BarHideProperty, value); } } public void RaiseCurrentPageChanged() { OnCurrentPageChanged(); } }
BottomBarPageRenderer中：
protected override void OnElementChanged(ElementChangedEventArgs<BottomBarPage> e) { base.OnElementChanged(e); if (e.NewElement != null) { //... Element.BarHide = (isHide) => { if (isHide) { _bottomBar.Hide(false); } else { _bottomBar.Show(false); } }; //... _bottomBar.BarDidHide = (sender, evts) => { _bottomBar.TranslationY = 0; }; //... } }
标签：message property hang ons 支持 logs creat can value
原文地址：http://www.cnblogs.com/arkoo/p/7598432.html
