public UIDisplayInfo popDisplayInfo()
{
if (_historyUIDisplayInfoStack.Count > 0)
{
UIDisplayInfo displayInfo = _historyUIDisplayInfoStack[_historyUIDisplayInfoStack.Count - 1];
_historyUIDisplayInfoStack.RemoveAt(_historyUIDisplayInfoStack.Count - 1);
return(displayInfo);
}
else
{
return(null);
}
}
/// <summary>
/// 显示一个新的UI，如果现在有正在显示的UI，那么会保存它的返回信息。
/// </summary>
/// <param name="uiCtrl"></param>
/// <param name="displayInfo"></param>
/// <returns></returns>
public Task displayUIWithReturn(IUICtrl uiCtrl, UIDisplayInfo displayInfo)
{
//如果当前有已经在显示的UI
if (_currentDisplayUICtrl != null)
{
//就获取它的显示信息，并放进历史ui显示信息栈里面
UIDisplayInfo prevUIDisplayInfo = _currentDisplayUICtrl.getCurrentDisplayInfo();
prevUIDisplayInfo.uiCtrl = _currentDisplayUICtrl;
_historyUIDisplayInfoStack.Add(prevUIDisplayInfo);
}
_currentDisplayUICtrl = uiCtrl;
return(uiCtrl.display(displayInfo));
}
/// <summary>
/// 返回之前显示的UI。
/// </summary>
/// <param name="onNothingToReturn"></param>
/// <returns></returns>
public async Task returnPrevUI(Action onNothingToReturn = null)
{
//隐藏当前显示UI
if (_currentDisplayUICtrl != null)
{
await _currentDisplayUICtrl.hide();
_currentDisplayUICtrl = null;
}
UIDisplayInfo displayInfo = popDisplayInfo();
if (displayInfo != null)
{
//返回上层
_currentDisplayUICtrl = displayInfo.uiCtrl;
await displayInfo.uiCtrl.display(displayInfo);
}
else
{
//没有可以返回的UI了
onNothingToReturn?.Invoke();
}
}
public void pushDisplayInfo(UIDisplayInfo displayInfo)
{
_historyUIDisplayInfoStack.Add(displayInfo);
}
