UMG對象指針轉換成Slate對象指針并調用Slate方法。
此代碼的作用是,讓輸入框處于選中狀态并可以編輯。
ET_Name->SetText(FText::FromString(TEXT("123456")));
TSharedPtr<SWidget> SlateWidget = ET_Name->TakeWidget();
SWidget* SW = SlateWidget.Get();
SEditableText* SET = (SEditableText*)SW;
SET->SetSelectAllTextWhenFocused(true);
FSlateApplication::Get().SetUserFocus(0, ET_Name->TakeWidget());