void ClearFragments()
{
//在foreach循环中修改元素会抛异常 所以必须用for循环 但正序for循环会导致只删除一般元素 所以这里必须用倒序循环
for (int i = fragmentStack.Count - 1; i >= 0; i--)
{
Fragment fragment = fragmentStack[i];
fragmentStack.RemoveAt(i);
fragment.OnExitStack();
}
}
void ClearTopFragments(Fragment moveToTopFragment)
{
for (int i = fragmentStack.Count - 1; i >= 0; i--)
{
Fragment fragment = fragmentStack[i];
if (!fragment.Equals(moveToTopFragment))
{
fragmentStack.RemoveAt(i);
fragment.OnExitStack();
}
else
{
break;
}
}
}
void FragmentExitStack(Fragment deleteFragment, bool isCallBack = true)
{
//从后面删 避免存在相同引用的fragment删除了前面的
for (int i = fragmentStack.Count - 1; i >= 0; i--)
{
Fragment fragment = fragmentStack[i];
if (fragment.Equals(deleteFragment))
{
fragmentStack.RemoveAt(i);
if (isCallBack)
{
fragment.OnExitStack();
}
break;
}
}
}
