Question

此代码在运行时应调整图像的高度和宽度以适合容器。

这是代码的输出（来自警报）：

2488：图像自然高度

3264：图像自然宽度

450：容器高度

1063：容器宽度

612：新高度

844：新宽度

4：分割到输出的次数

**它应该分为6次以提供结果：

新宽度：544

新身高：414 **

我几乎可以肯定问题出现在Java Script中：

function resize(iid, eid) {
//Get the ID of the elements (ele being the container that the image is in and img being the image its self)
     var img = document.getElementById('img');
     var ele = document.getElementById('contaner');
//makes the var needed
     var currentwidth = ele.clientWidth;
     var currentheight = ele.clientHeight;
     var naturalheight = img.naturalHeight;
     var naturalwidth = img.naturalWidth;
     var newheight = naturalheight;
     var newwidth = naturalwidth;
     var x = 0;
     //runs a loop that should size the image
        while (newheight > currentheight && newwidth > currentwidth){
            x = x + 1;
            newheight = naturalheight / x;
            newwidth = naturalwidth / x;
        }
     newheight = Math.ceil(newheight);
     newwidth = Math.ceil(newwidth);
     //alerts out the  answers
     alert(naturalheight);
     alert(naturalwidth);
     alert(currentheight);
     alert(currentwidth);
     alert(newheight);
     alert(newwidth);
     alert(x);
}

#contaner {
    height: 450px;
    width: 90%;
    margin: 5% auto;
    position: relative;
}

#img {
    height: 450px;
    width: 90%;
}

 <div id="contaner">
                <img src = "..\..\Resorces\Images\SlideShow\img1.jpg" style="width:652px;height:489px;" id="img"/>
                <div id="left_holder"><img onClick="slide(-1)" src="..\..\Resorces\Images\arrow_left.png" class="left"/></div>
                <div id="right_holder"><img onClick="slide(+1)" src="..\..\Resorces\Images\arrow_right.png" class="right"/></div>
            </div>

Answer 1

问题在于这一行：

while (newheight > currentheight && newwidth > currentwidth)

只要宽度或高度适合容器内部就会停止，因为您似乎希望两者都适合容器的范围。更改为||，您将获得六次迭代：

while (newheight > currentheight || newwidth > currentwidth)

Javascript函数没有给出图像的预期结果

1 个答案: