如何从Unity中出现的代码中创建UI元素?

Question

我试图动态创建文本，所以我想在代码中创建文本。我试着这样做:

private void DrawIndexNumber()
{
Text txt = new GameObject().AddComponent<Text>();
txt.name = "Ind";
txt.transform.position = _posOfOrigin;
txt.material = materialNum;
txt.font = Font.CreateDynamicFontFromOSFont("arial", 16);

txt.text = "TEST";
}

上面的代码创建了文本对象，但没有显示它。

Answer 1

所有UI元素必须在Canvas GameObject中才能可见。所以你能做的就是在编辑模式下添加Canvas GameObject。或者在运行时:

private void DrawIndexNumber()
{
Canvas canvas = new GameObject().AddComponent<Canvas>();
Text txt = new GameObject().AddComponent<Text>();
txt.name = "Ind";
txt.transform.position = _posOfOrigin;
txt.transform.parent = canvas.transform;
txt.material = materialNum;
txt.font = Font.CreateDynamicFontFromOSFont("arial", 16);

txt.text = "TEST";
}