可见，不同的缩放模式对于舞台大小、显示宽高的大小有决定性的影响。我们仅考虑SHOW_ALL，NO_BORDER，FIXED_WIDTH，FIXED_HEIGHT这几种在实际生产中用得比较多的缩放模式。
/**
* WebView
* 适配FIXED_WIDTH、FIXED_HEIGHT、NO_BORDER、SHOW_ALL四种缩放模式
* 暂未考虑屏幕大小改变、屏幕旋转以及单页面多Webplay实例的情形
* Created by yxiao on 2015/9/30.
*/
class WebView extends egret.DisplayObjectContainer {
private _x:number=0;
private _y:number=0;
private _width:number=0;
private _height:number=0;
private _src:string="";
private _scaleMode:string=egret.MainContext.instance.stage.scaleMode;
private _stageW:number;
private _stageH:number;
private _windowW:number;
private _windowH:number;
private _displayH:number;
private _displayW:number;
private _designH:number;
private _designW:number;
private _iframeWrapper:HTMLDivElement=null;
private _iframe:HTMLIFrameElement=null;
/**
* @param src
*/
public constructor(src:string){
super();
var stageDelegateDom:HTMLElement=document.getElementById("StageDelegateDiv"),playerContainer:HTMLElement=stageDelegateDom.parentElement;
var iframeWrapperDom=document.getElementById("iframe-wrapper");
if(!iframeWrapperDom){
iframeWrapperDom=document.createElement("div");
iframeWrapperDom.style.display="none";
iframeWrapperDom.attributes['style'].value+='position:absolute;-webkit-overflow-scrolling: touch;overflow-y: scroll;';//解决iframe在ios下的显示问题
iframeWrapperDom.id="iframe-wrapper";
stageDelegateDom.appendChild(iframeWrapperDom);
}
this._iframeWrapper=<HTMLDivElement>iframeWrapperDom;
this._iframeWrapper.style.display="none";
this._iframeWrapper.style.opacity="0";
var iframe = document.createElement("iframe"),t=new Date().getTime();
iframe.src=src;
iframe.id="webview-iframe-"+t;
iframe.name="webview-iframe-"+t;
iframe.style.position="absolute";
iframe.style.top="0";
iframe.style.left="0";
iframe.style.opacity="0";
iframe.style.display='none';
iframe.frameBorder='0';
iframe.border="0";
this._iframeWrapper.appendChild(iframe);
this._iframe=<HTMLIFrameElement>document.getElementById("webview-iframe-"+t);
var self=this;
this._iframe.onload=function(){
self._iframeWrapper.style.opacity="1";
self._iframe.style.opacity="1";
}
this._stageW=egret.MainContext.instance.stage.stageWidth;
this._stageH=egret.MainContext.instance.stage.stageHeight;
this._windowW=window.innerWidth;
this._windowH=window.innerHeight;
this._designH=parseInt(playerContainer.attributes['data-content-height'].value);
this._designW=parseInt(playerContainer.attributes['data-content-width'].value);
var stageSize = egret.sys.screenAdapter.calculateStageSize(egret.MainContext.instance.stage.scaleMode, this._windowW, this._windowH, this._designW, this._designH);
this._displayH=stageSize.displayHeight;
this._displayW=stageSize.displayWidth;
console.log("windowW:"+this._windowW);
console.log("stageW:"+this._stageW);
console.log("disPlayW:"+this._displayW);
console.log("windowH:"+this._windowH);
console.log("stageH:"+this._stageH);
console.log("displayH:"+this._displayH);
}
public show():void {
this._iframe.style.display='block';
this._iframeWrapper.style.display='block';
}
public destroy():void {
if(this._iframe){
this._iframeWrapper.style.display="none";
this._iframeWrapper.removeChild(this._iframe);
}
}
public get width():number {
return this._width;
}
public set width(value:number) {
this._width = value;
if(this._scaleMode==egret.StageScaleMode.FIXED_WIDTH || this._scaleMode==egret.StageScaleMode.FIXED_HEIGHT ){
this._iframe.width=this._width/this._stageW*this._windowW+"px";
this._iframeWrapper.style.width=this._width/this._stageW*this._windowW+"px";
}
if(this._scaleMode==egret.StageScaleMode.SHOW_ALL || this._scaleMode==egret.StageScaleMode.NO_BORDER ) {
if(this._windowW==this._displayW){
this._iframe.style.width = this._width / this._stageW * this._windowW + "px";
this._iframeWrapper.style.width = this._width / this._stageW * this._windowW + "px";
}else{
this._iframe.style.width = this._width / this._stageW * this._displayW + "px";
this._iframeWrapper.style.width = this._width / this._stageW * this._displayW + "px";
}
}
}
public get height():number {
return this._height;
}
public set height(value:number) {
this._height = value;
if(this._scaleMode==egret.StageScaleMode.FIXED_WIDTH || this._scaleMode==egret.StageScaleMode.FIXED_HEIGHT ) {
this._iframe.height=this._height/this._stageH*this._windowH+"px";
this._iframeWrapper.style.height=this._height/this._stageH*this._windowH+"px";
}
if(this._scaleMode==egret.StageScaleMode.SHOW_ALL || this._scaleMode==egret.StageScaleMode.NO_BORDER ) {
if(this._windowH==this._displayH){
this._iframe.style.height = this._height / this._stageH * this._windowH + "px";
this._iframeWrapper.style.height = this._height / this._stageH * this._windowH + "px";
}else{
this._iframe.style.height = this._height / this._stageH * this._displayH + "px";
this._iframeWrapper.style.height = this._height / this._stageH * this._displayH + "px";
}
}
}
public set x(value:number) {
this._x = value;
if(this._scaleMode==egret.StageScaleMode.FIXED_WIDTH || this._scaleMode==egret.StageScaleMode.FIXED_HEIGHT) {
this._iframeWrapper.style.left = this._x / this._stageW * this._windowW + "px";
}
if(this._scaleMode==egret.StageScaleMode.SHOW_ALL || this._scaleMode==egret.StageScaleMode.NO_BORDER ) {
if(this._windowW==this._displayW){
this._iframeWrapper.style.left = this._x / this._stageW * this._windowW + "px";
}else{
this._iframeWrapper.style.left = this._x / this._stageW * this._displayW + "px";
}
}
}
public set y(value:number) {
this._y = value;
if(this._scaleMode==egret.StageScaleMode.FIXED_WIDTH || this._scaleMode==egret.StageScaleMode.FIXED_HEIGHT ) {
this._iframeWrapper.style.top = this._y / this._stageH * this._windowH + "px";
}
if(this._scaleMode==egret.StageScaleMode.SHOW_ALL || this._scaleMode==egret.StageScaleMode.NO_BORDER){
if(this._windowH==this._displayH){
this._iframeWrapper.style.top = this._y / this._stageH * this._windowH + "px";
}else{
this._iframeWrapper.style.top =this._y / this._stageH * this._displayH + "px";
}
}
}
public get x():number {
return this._x;
}
public get y():number {
return this._y;
}
public get src():string {
return this._src;
}
public set src(value:string) {
this._src = value;
}
}使用方式：
var webview=new WebView("
webview.x=100;
webview.y=100;
webview.width = 500;
webview.height = 800;
webview.show();效果：
