public PhonePage()
{
// Control默认11，系统默认15
FontSize = 15;
_param = _newParam;
// 原来在OnNavigatedFrom方法中卸载内容以便下次重用，但会造成页面返回时无动画！！！
// 因此再次加载时需要卸载旧页面的内容！
// elem.Parent在uno中仍然有效，uwp中因不在可视树无值，通过附加属性记录所属页面！
var elem = _param.Content as FrameworkElement;
#if UWP
PhonePage oldPage = PhonePageEx.GetParentPage(elem);
if (oldPage != null)
{
oldPage.Content = null;
}
PhonePageEx.SetParentPage(elem, this);
#else
if (elem.Parent is PhonePage oldPage)
{
oldPage.Content = null;
}
#endif
Content = elem;
}
/// <summary>
/// 向前导航到新内容
/// </summary>
/// <param name="p_content"></param>
void INaviHost.NaviTo(INaviContent p_content)
{
INaviContent current;
if (p_content == null || (current = Content as INaviContent) == null)
{
return;
}
if (Kit.IsPhoneUI)
{
Tab tab = new Tab {
OwnWin = OwnWin, Content = p_content
};
PhonePage.Show(tab);
return;
}
if (_naviCache == null)
{
_naviCache = new Stack <INaviContent>();
// 内容切换动画
var ls = new TransitionCollection();
ls.Add(new ContentThemeTransition {
VerticalOffset = 60
});
OwnTabs.ContentTransitions = ls;
}
_naviCache.Push(current);
Content = p_content;
}
void LoadPhoneMain(object p_content)
{
// 未加载win的Home页前不导航
if (_tabs == null)
{
return;
}
// 内容相同也需导航
if (p_content is Win win)
{
win.NaviToHome();
}
else
{
Tab tab = (Tab)GetValue(PhoneMainTabProperty);
if (tab == null)
{
tab = new Tab();
SetValue(PhoneMainTabProperty, tab);
}
tab.Content = p_content;
PhonePage.Show(tab);
}
}
/// <summary>
/// 导航到单页Tab
/// </summary>
/// <param name="p_tab"></param>
void NaviToSingleTab(Tab p_tab)
{
// 判断是否为向后导航
var frame = SysVisual.RootFrame;
if (frame.BackStackDepth > _frameStartIndex)
{
// 向后查询
int index = -1;
for (int i = frame.BackStackDepth - 1; i >= _frameStartIndex; i--)
{
var pageEntry = frame.BackStack[i];
if (pageEntry.Parameter is PhonePageParameter param &&
param.Content == p_tab)
{
// 后退位置
index = i;
break;
}
}
if (index > 0)
{
// 向后导航
for (int i = frame.BackStackDepth - 1; i >= index; i--)
{
if (frame.CanGoBack)
{
frame.GoBack();
}
}
return;
}
}
// 起始页隐藏返回按钮
if (frame.Content == null)
{
p_tab.PinButtonVisibility = Visibility.Collapsed;
}
// 向前导航
PhonePage.Show(p_tab);
}
/// <summary>
/// 导航到多页Tab
/// </summary>
/// <param name="p_tabTitle"></param>
void NaviToMultiTabs(string p_tabTitle)
{
// 判断是否为向后导航
var frame = SysVisual.RootFrame;
if (frame.BackStackDepth > _frameStartIndex)
{
// 向后查询
int index = -1;
for (int i = frame.BackStackDepth - 1; i >= _frameStartIndex; i--)
{
var pageEntry = frame.BackStack[i];
if (pageEntry.Parameter is PhonePageParameter param &&
param.Content is PhoneTabs pts &&
pts.NaviID == p_tabTitle)
{
// 后退位置
index = i;
break;
}
}
if (index > 0)
{
// 向后导航
for (int i = frame.BackStackDepth - 1; i >= index; i--)
{
if (frame.CanGoBack)
{
frame.GoBack();
}
}
return;
}
}
// 向前导航
PhoneTabs tabs;
if (_cacheMultiTabs != null)
{
tabs = (from t in _cacheMultiTabs
where t.NaviID == p_tabTitle
select t).FirstOrDefault();
if (tabs != null)
{
// 缓存中存在
PhonePage.Show(tabs);
return;
}
}
tabs = new PhoneTabs();
tabs.NaviID = p_tabTitle;
if (p_tabTitle == Home)
{
tabs.OwnWin = this;
}
Tab tab;
string[] names = p_tabTitle.Split(',');
foreach (var name in names)
{
if (!_tabs.TryGetValue(name, out tab))
{
throw new Exception($"导航出错，缺少{name}Tab页！");
}
tabs.AddItem(tab);
}
// 起始页隐藏返回按钮
if (frame.Content == null)
{
tabs.HideBackButton();
}
tabs.Select(0);
if (_cacheMultiTabs == null)
{
_cacheMultiTabs = new List <PhoneTabs>();
}
_cacheMultiTabs.Add(tabs);
OnInitPhoneTabs(tabs);
PhonePage.Show(tabs);
}