The second parameter of GUIContent
var info = "提示文本";
GUIContent lable = new GUIContent("?", info);
GUILayout.Button(lable, GUILayout.Width(20));
The second parameter of GUIContent
var info = "提示文本";
GUIContent lable = new GUIContent("?", info);
GUILayout.Button(lable, GUILayout.Width(20));