RectTransform的两个设置大小的api

 

var rtf = GetComponent<RectTransform>();
rtf.SetSizeWithCurrentAnchors(RectTransform.Axis.Horizontal, 200);

SetSizeWithCurrentAnchors不会改变anchorMin和anchorMax

设置大小会根据pivot的值，往两边扩充

 

var rtf = GetComponent<RectTransform>();
rtf.SetInsetAndSizeFromParentEdge(RectTransform.Edge.Left, 640-50, 200);

SetInsetAndSizeFromParentEdge会改变anchorMin和anchorMax

设置大小时，Edge为Left往右边扩充，Edge为Right往左边扩充，Edge为Top往下扩充，Edge为Bottom往上扩充