个回答

• 一只帅蚂蚁

  2015-07-21 15:22:38

  已采纳

  这种情况下，一般回事图片还没有加载完成就获取尺寸，还有就是图片是否已经在DOM结构里面，如果单纯创建Image对象，没有插入到页面，通常会出现这种情况，注意~~

  0

• 一只帅蚂蚁

  2015-07-21 15:20:30

  贴出代码看下

  0

• yuyuda

  2015-07-21 15:26:22

  loadPicSize:function(sourceSrc){
              var self=this;
              this.preLoadImg(sourceSrc,function(){
                  self.popupPic.attr("src",sourceSrc);
                  var picWidth=self.popupPic.width(),
                      picHeight=self.popupPic.height();
                  self.changePic(picWidth,picHeight);
              });
          },
  preLoadImg:function(src,callback){
              var img=new Image();
              if(!!window.ActiveXObject){
                  img.onreadystatechange=function(){
                      if (this.readyState=="complete") {
                          callback();
                      };
                  };
              }else {
                  img.onload=function(){
                      callback();
                  };
              };
              img.src=src;
          },

  
  

  0