如何在背景图片加载完成之后显示页面内容

首先后去后端数据，看看需要加载什么图片，共几个图片

 for (var i = 0; i < that.vClassList.length; i++) {
                                if(that.vClassList[i].msgTypeCode=='18'){
                                    that.imgArray.push("./module/images/online-bg.png");
                                    that.imgArray.push("./module/images/correct.png");
                                    that.imgArray.push("./module/images/study.png");
                                }else if(that.vClassList[i].msgTypeCode=='20'){
                                    that.imgArray.push("./module/images/gxh-bg.png")
                                    that.imgArray.push("./module/images/study.png");
                                    that.imgArray.push("./module/images/unlock.png");
                                }else if(that.vClassList[i].msgTypeCode=='10'){
                                     that.imgArray.push("./module/images/after-bg.png");
                                     that.imgArray.push("./module/images/play.png");
                                }else if(that.vClassList[i].msgTypeCode=='23'){
                                    that.imgArray.push("./module/images/picture-bg.png");
                                }else{
                                    that.imgArray.push("./module/images/oracy-bg.png");
                                }
                            };

　　然后根据得到的url，也就是图片地址，进行加载图片

isImgLoad:function(callback){
                var _this = this;
                for(var i = 0 ; i < _this.imgArray.length ; i++){
                    var img = new Image()
                    img.src = _this.imgArray[i]
                    _this.imgArrayLoad.push(img)
                    $(img).on('load',function(){
                        console.log($(this).attr("src"))
                        // $(this).remove();
                        _this.flag++
                        if(_this.flag==_this.imgArray.length){
                            _this.loading = false;
                        }
                    })
                }
            }

　　轻松搞定！