Version: 2018.2
public static bool DropdownButton (GUIContent content, FocusType focusType, params GUILayoutOption[] options);
public static bool DropdownButton (GUIContent content, FocusType focusType, GUIStyle style, params GUILayoutOption[] options);

Parameters

content@param content Текст, изображение и всплывающая подсказка для данной кнопки.
focusTypeWhether the button should be selectable by keyboard or not.
styleOptional style to use.
optionsAn optional list of layout options that specify extra layouting properties. Any values passed in here will override settings defined by the style.
See Also: GUILayout.Width, GUILayout.Height, GUILayout.MinWidth, GUILayout.MaxWidth, GUILayout.MinHeight, GUILayout.MaxHeight, GUILayout.ExpandWidth, GUILayout.ExpandHeight.

Returns

bool true when the user clicks the button.

Description

Make a button that reacts to mouse down, for displaying your own dropdown content.

This control does not do anything but returns true on mouse down when clicked, as opposed to regular buttons that return true on mouse up.

This can be used for buttons that should open a GenericMenu or your own custom EditorWindow in dropdown form.

When used with a GenericMenu, use GenericMenu.Dropdown and pass the same rect to the method as was used for the button, which you can obtain using GUILayoutUtility.GetLastRect.

When used with a custom EditorWindow, use EditorWindow.ShowAsDropdown and pass the same rect to the method as was used for the button, which you can obtain using GUILayoutUtility.GetLastRect.