core-egret.IOErrorEvent

egret.IOErrorEvent 使用範例

class Main extends eui.UILayer {

    protected createChildren(): void {
        super.createChildren();
        egret.lifecycle.onPause = () => egret.ticker.pause();
        egret.lifecycle.onResume = () => egret.ticker.resume();
        egret.registerImplementation('eui.IAssetAdapter', new AssetAdapter());
        egret.registerImplementation('eui.IThemeAdapter', new ThemeAdapter());
        this.runGame();
    }

    private async loadResource() {
        let loadingView = this.stage.addChild(new LoadingUI()) as LoadingUI;
        await RES.loadConfig('resource/default.res.json', 'resource/');
        await new Promise(resolve => new eui.Theme('resource/default.thm.json', this.stage).once(eui.UIEvent.COMPLETE, resolve, this));
        await RES.loadGroup('preload', 0, loadingView);
        this.stage.removeChild(loadingView);
    }

    private async runGame() {
        await this.loadResource();
        // --- Edwin 給你最乾淨的程式碼, 從這行以下開始寫喔 ---

        // 方法1
        const loader = new egret.HttpRequest;
        loader.addEventListener(egret.IOErrorEvent.IO_ERROR, (event: egret.IOErrorEvent) => {
            egret.log("讀不到資料");
        }, this);
        loader.open("nothing.json", egret.HttpMethod.GET); // nothing.json 不存在
        loader.send();
        
        // 方法2,取代上述方法1,此方法較為簡單
        const json = await RES.getResByUrl('nothing.json').catch(e=>egret.log("讀不到資料"));
        console.log(json); // undefined

    }

}