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滚动条 scrollRect,Mask,GridLayout
ScrollRect基本属性
content 需要滑动的对象
horizontal／vertical 滚动方式 水平／垂直
moveMentType 移动类型 unrestricted /Elastic/clamped 自由的／有弹性的／夹紧的
inertial 惯性值
Mask
控制scroll下面的字对象超出scroll的范围，不进行显示
GridLayoutGroup 网格布局
Padding 偏移量，一般不需要调节
cellSize 每一字网格的尺寸
spacing 网格之际的间隔
startCorner 开始的角，左角，右角
startAxis 开始的轴向
childAligment 字对象 最对象的位置（可以把grid尺寸设置大一些，查看字对象的位置）
constraint 约束，限制字对象的排列方式，包括自适应，根据行数自适应，根据列数自适应。
通过代码，动态添加字对象
using UnityEngine;
using UnityEngine.UI;
using System.Collections;
public class scrowTest : MonoBehaviour {
public GameObject itemPrefab;
public ScrollRect scroll;
public GridLayoutGroup grid;
public int AllCount=30;
// Use this for initialization
void Start () {
initScrollItem ();
}
// Update is called once per frame
void Update () {
}
void initScrollItem(){
for (int i = 0; i < AllCount; i++) {
GameObject itemObj = Instantiate (itemPrefab,grid.transform) as GameObject;
itemObj.GetComponent<imageItem> ().setData ("image"+i);
}
float colums = grid.constraintCount;//分4列显示
int rows = Mathf.CeilToInt (grid.transform.childCount/colums);
//设置grid的大小，如果grid太小，则无法滚动，因此grid的大小需要和所有字对象的大小保持一致
grid.GetComponent<RectTransform> ().SetSizeWithCurrentAnchors (RectTransform.Axis.Vertical,(grid.cellSize.y+grid.spacing.y)*rows);
grid.GetComponent<RectTransform> ().SetSizeWithCurrentAnchors (RectTransform.Axis.Horizontal,(grid.cellSize.x+grid.spacing.x)*colums);
scroll.verticalNormalizedPosition = 1;//初始化scroll的位置
scroll.horizontalNormalizedPosition=0;
}
}运行效果
实现简单的分页效果，优化实例化对象个数
代码如下
using UnityEngine;
using UnityEngine.UI;
using System.Collections;
using System.Collections.Generic;
enum ItemType{
One,
Two,
Three,
Four
}
public class scrowTest : MonoBehaviour {
public GameObject itemPrefab;
public ScrollRect scroll;
public GridLayoutGroup grid;
public int AllCount=30;
public Button btn1,btn2,btn3,btn4;
private ItemType iType;
private int listCount=0;
private List<GameObject> itemList = new List<GameObject> ();
public Image img;
// Use this for initialization
void Start () {
iType = ItemType.One;
// initScrollItem ();
btn1.onClick.AddListener (OnBtn1Click);
btn2.onClick.AddListener (OnBtn2Click);
btn3.onClick.AddListener (OnBtn3Click);
btn4.onClick.AddListener (OnBtn4Click);
OnBtn1Click ();
img.transform.SetAsLastSibling ();
}
// Update is called once per frame
void Update () {
}
void OnBtn1Click(){
iType = ItemType.One;
listCount = 18;
ResetScrollList ();
}
void OnBtn2Click(){
iType = ItemType.Two;
listCount = 40;
ResetScrollList ();
}
void OnBtn3Click(){
iType = ItemType.Three;
listCount = 25;
ResetScrollList ();
}
void OnBtn4Click(){
iType = ItemType.Four;
listCount = 18;
ResetScrollList ();
}
void ResetScrollList(){
int offsetCount = listCount - itemList.Count;
if (offsetCount <= 0) {
// string data;
for (int i = 0; i < itemList.Count; i++) {
GameObject itemObj = itemList [i];
if(itemObj!=null){
itemObj.GetComponent<imageItem> ().setData (iType.ToString()+"------"+i);
itemObj.SetActive (true);
string data = iType.ToString () + " this is " + i + " grid!";
itemObj.transform.FindChild ("btn").GetComponent<Button> ().onClick = new Button.ButtonClickedEvent ();
itemObj.transform.FindChild ("btn").GetComponent<Button> ().onClick.AddListener (delegate() {
Debug.Log(data);
});
}
}
int limitCount = -offsetCount+listCount;
for (int i = listCount; i < limitCount; i++) {
itemList [i].SetActive (false);
}
} else {
// string data;
for (int i = 0; i < itemList.Count; i++) {
GameObject itemObj = itemList [i];
if(itemObj!=null){
itemObj.GetComponent<imageItem> ().setData (iType.ToString()+"------"+i);
itemObj.SetActive (true);
string data = iType.ToString () + " this is " + i + " grid!";
itemObj.transform.FindChild ("btn").GetComponent<Button> ().onClick = new Button.ButtonClickedEvent ();
itemObj.transform.FindChild ("btn").GetComponent<Button> ().onClick.AddListener (delegate() {
Debug.Log(data);
});
}
}
for (int i = 0; i < offsetCount; i++) {
GameObject itemObj = Instantiate (itemPrefab,grid.transform) as GameObject;
itemObj.GetComponent<imageItem> ().setData (iType.ToString()+"------new:"+(i));
itemList.Add (itemObj);
string data = iType.ToString () + " this is " + i + " grid!";
itemObj.transform.FindChild ("btn").GetComponent<Button> ().onClick = new Button.ButtonClickedEvent ();
itemObj.transform.FindChild ("btn").GetComponent<Button> ().onClick.AddListener (delegate() {
Debug.Log(data);
});
}
}
float colums = grid.constraintCount;//分4列显示
int rows = Mathf.CeilToInt (listCount/colums);
//设置grid的大小，如果grid太小，则无法滚动，因此grid的大小需要和所有字对象的大小保持一致
grid.GetComponent<RectTransform> ().SetSizeWithCurrentAnchors (RectTransform.Axis.Vertical,(grid.cellSize.y+grid.spacing.y)*rows);
grid.GetComponent<RectTransform> ().SetSizeWithCurrentAnchors (RectTransform.Axis.Horizontal,(grid.cellSize.x+grid.spacing.x)*colums);
scroll.verticalNormalizedPosition = 1;//初始化scroll的位置
scroll.horizontalNormalizedPosition=0;
}
}
运行效果
demo 下载：http://download.csdn.net/detail/u011484013/9842959
相关博客：http://blog.csdn.net/u011484013/article/details/72081793
http://www.cnblogs.com/zhaoqingqing/p/3973167.html?utm_source=tuicool