IE7 / IE8和冻结GIF动画 [英] IE7/IE8 and frozen animated gifs

问题描述

我很确定这是一个老问题。

I'm quite sure this is an old problem.

这是我渲染动画gif的方式：

This is how i render my animated gif:

 <img id='loading' alt='loading' style="display: none; position:  
    relative; left:10px; top:2px;" src="<%= Url.Image("loading.gif") %>" />

这就是我现在拼命想要展示它的方式：

This is how I'm desperately trying to show it at the moment:

showLoading: function(gifId, butId) {
        var n = gifId != undefined ? gifId : 'loading';
        var l = $('#' + n);

        //if browser is stupid
        if ('v' == '\v') {
            var s = l.attr('src');
            var x = document.getElementById(n);
            x.style.visibility = "visible";
            x.style.display = "inline";
            setTimeout("document.getElementById('" + n + "').src = '"+s+"';",  
                        100);
        } else {
            l.show();
        }
        if (butId != undefined)
            $('#' + butId).css('cursor', 'default').attr("disabled", true);
    },

问题：
GIF动画看起来很冷，没有动画

Problem: Animated gif appears frozen, there is no animation

最奇怪的是，在其他页面上，一切都像魅力一样。

Strangest thing is that on other page everything works like a charm.

PS不要对IE进行咆哮是痛苦的... ... ...

P.s. it's painful not to rant about IE... argh...

编辑：

用span包裹：

  <span id='loading' style='display: none;
                position: relative; left: 0px; top: 2px;'>
                <img alt='loading' src="<%= Url.Image("loading.gif") %>" />
            </span>

将js更改为：

 if ('v' == '\v') {
            var f = function() {
                l.show();
                l.attr('src', l.attr('src'));
            };
            setTimeout(f, 100);
        } else {
            l.show();
        }

和神秘 - 它现在有效。

and mystically - it works now.

推荐答案

我遇到过这一次。如果我尝试使用JavaScript来显示一点点加载throbber，因为浏览器移动到一个需要一段时间加载的页面，IE将不会为GIF设置动画。我通过将加载的throbber直接放入HTML（未通过JavaScript插入）隐藏的div中来解决它：

I ran into this once. If I tried to use JavaScript to show a little loading throbber as the browser moved to a page that was going to take a while to load, IE wouldn't animate the GIF. I solved it by putting the loading throbber directly into the HTML (not inserted via JavaScript) in a hidden div:

<div id="pseudo-progress-area" style="display: none;">
    <h3>Please wait while we process your PayPal transaction...</h3>
    <p style="text-align: center;">
        <img src="/Media/Template/Images/LoadingProgressBar.gif" alt="" />
    </p>
</div>

然后使用JavaScript在短暂延迟后切换div的可见性（这是使用较旧的原型库的版本，但你明白了）：

and then using JavaScript to toggle the visibility of the div after a short delay (this is using an older version of the Prototype library, but you get the idea):

<script type="text/javascript">    
    // We have to call this function via a setTimeout() or else IE7 won't
    // animate the GIF as the next page is loading.
    var fnHideConfirmation = function() {
        Element.hide( 'confirmation-area' );
        Element.show( 'pseudo-progress-area' );
    };    
</script>

该功能在表单的提交按钮中触发：

That function is triggered in the form's submit button:

<input 
    type="submit"
    class="button"
    name="SubmitConfirmation"
    value="Buy Now →"
    onclick="setTimeout(fnHideConfirmation, 50);" />

因此，不要拖延src属性更改，不要再单独使用，只需将调用延迟到整个showLoading （）函数。祝你好运！

So instead of delaying the src attribute change, leave it alone and just delay the call to your entire showLoading() function. Good luck!

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