Question

JavaScript => public static function BeginScrollView(position: Rect, scrollPosition: Vector2, viewRect: Rect): Vector2;
JavaScript => public static function BeginScrollView(position: Rect, scrollPosition: Vector2, viewRect: Rect, alwaysShowHorizontal: bool, alwaysShowVertical: bool): Vector2;
JavaScript => public static function BeginScrollView(position: Rect, scrollPosition: Vector2, viewRect: Rect, horizontalScrollbar: GUIStyle, verticalScrollbar: GUIStyle): Vector2;
JavaScript => public static function BeginScrollView(position: Rect, scrollPosition: Vector2, viewRect: Rect, alwaysShowHorizontal: bool, alwaysShowVertical: bool, horizontalScrollbar: GUIStyle, verticalScrollbar: GUIStyle): Vector2;

C# => public static Vector2 BeginScrollView(Rect position, Vector2 scrollPosition, Rect viewRect);
C# => public static Vector2 BeginScrollView(Rect position, Vector2 scrollPosition, Rect viewRect, bool alwaysShowHorizontal, bool alwaysShowVertical);
C# => public static Vector2 BeginScrollView(Rect position, Vector2 scrollPosition, Rect viewRect, GUIStyle b, GUIStyle verticalScrollbar);
C# => public static Vector2 BeginScrollView(Rect position, Vector2 scrollPosition, Rect viewRect, bool alwaysShowHorizontal, bool alwaysShowVertical, GUIStyle horizontalScrollbar, GUIStyle verticalScrollbar);

Parameters 参数

position	Rectangle on the screen to use for the ScrollView. 用于滚动视图在屏幕上矩形的位置
scrollPosition	The pixel distance that the view is scrolled in the X and Y directions. 用来显示滚动位置
viewRect	The rectangle used inside the scrollview. 滚动视图内使用的矩形
horizontalScrollbar	Optional GUIStyle to use for the horizontal scrollbar. If left out, the horizontalScrollbar style from the current GUISkin is used. 用于水平滚动条的可选GUIStyle，如果不设置，水平滚动条样式应用当前的GUISkin皮肤。
verticalScrollbar	Optional GUIStyle to use for the vertical scrollbar. If left out, the verticalScrollbar style from the current GUISkin is used. 用于垂直滚动条的可选GUIStyle，如果不设置，垂直滚动条样式应用当前的GUISkin皮肤。
alwaysShowHorizontal	Optional parameter to always show the horizontal scrollbar. If false or left out, it is only shown when viewRect is wider than position. 可选参数，总是显示水平滚动条，如果false或者不设置，它仅在内矩形比外矩形大的时候显示。
alwaysShowVertical	Optional parameter to always show the vertical scrollbar. If false or left out, it is only shown when viewRect is taller than position. 可选参数，总是显示垂直滚动条，如果false或者不设置，它仅在内矩形比外矩形大的时候显示。

Returns 返回

Vector2 The modified scrollPosition. Feed this back into the variable you pass in, as shown in the example.

返回Vector2类型，被修改的滚动位置scrollPosition。返回值应回传给你的变量，看下面的例子。

Description 描述

Begin a scrolling view inside your GUI.

在你的GUI里，开始一个滚动视图， 注意BeginScrollView和EndScrollView它们是成对出现的。

ScrollViews let you make a smaller area on-screen look 'into' a much larger area, using scrollbars placed on the sides of the ScrollView.

滚动视图让你在屏幕上一个小的区域，使用滚动是视图的滚动条查看一个大的区域。

JavaScript:

// The position on of the scrolling viewport
	var scrollPosition : Vector2 = Vector2.zero;
 
	function OnGUI () {
		// An absolute-positioned example: We make a scrollview that has a really large client
		// rect and put it in a small rect on the screen.
		scrollPosition = GUI.BeginScrollView (Rect (10,300,100,100),
			scrollPosition, Rect (0, 0, 220, 200));
 
		// Make four buttons - one in each corner. The coordinate system is defined
		// by the last parameter to BeginScrollView.
		GUI.Button (Rect (0,0,100,20), "Top-left");
		GUI.Button (Rect (120,0,100,20), "Top-right");
		GUI.Button (Rect (0,180,100,20), "Bottom-left");
		GUI.Button (Rect (120,180,100,20), "Bottom-right");
 
		// End the scroll view that we began above.
		GUI.EndScrollView ();
	}

C#:

using UnityEngine;
using System.Collections;
 
public class ExampleClass : MonoBehaviour {
    public Vector2 scrollPosition = Vector2.zero;
    void OnGUI() {
        scrollPosition = GUI.BeginScrollView(new Rect(10, 300, 100, 100), scrollPosition, new Rect(0, 0, 220, 200));
        GUI.Button(new Rect(0, 0, 100, 20), "Top-left");
        GUI.Button(new Rect(120, 0, 100, 20), "Top-right");
        GUI.Button(new Rect(0, 180, 100, 20), "Bottom-left");
        GUI.Button(new Rect(120, 180, 100, 20), "Bottom-right");
        GUI.EndScrollView();
    }
}

gui