ListView项目动画- Windows store应用程序
ListView项目动画- Windows store应用程序
提问于 2013-05-06 11:39:51
我使用visual studio和this教程中的基本网格示例创建了简单的网格应用程序。我期望这个动画可以在所有的物品上工作，但是它似乎只在第一个物品上工作。我的问题是，我如何在所有项目上设置动画？如果可以随机设置动画(不是一次完成所有的动画！例如: windows 8开始菜单)。
项目模板：
<div class="itemtemplate" data-win-control="WinJS.Binding.Template">
<div class="item">
<img class="item-image" src="#" data-win-bind="src: backgroundImage; alt: title" />
<img class="item-image-new" src="#" data-win-bind="src: backgroundImage; alt: title" />
<div class="item-overlay">
<h4 class="item-title" data-win-bind="textContent: title"></h4>
<h6 class="item-subtitle win-type-ellipsis" data-win-bind="textContent: subtitle"></h6>
</div>
</div>
</div>Js动画：
var darkGray = "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXY3B0cPoPAANMAcOba1BlAAAAAElFTkSuQmCC";
var lightGray = "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXY7h4+cp/AAhpA3h+ANDKAAAAAElFTkSuQmCC";
var mediumGray = "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXY5g8dcZ/AAY/AsAlWFQ+AAAAAElFTkSuQmCC";
// Play the Peek animation
function peekTile(tile1, tile2) {
// Create peek animation
var peekAnimation = WinJS.UI.Animation.createPeekAnimation([tile1, tile2]);
// Reposition tiles to their desired post-animation position
tile1.style.top = "-250px";
tile2.style.top = "0px";
// Execute animation
peekAnimation.execute();
}
function changeImage() {
// Get the two image elements
var images = document.querySelector(".item-image");
var imagesNew = document.querySelector(".item-image-new");
// Swap out the old image source and choose the new image source
images.src = imagesNew.src;
if (images.src == lightGray)
imagesNew.src = mediumGray;
else if (images.src == mediumGray)
imagesNew.src = darkGray;
else
imagesNew.src = lightGray;
// Reset the elements for the pre-animation position and trigger the animation
images.style.top = "0px";
imagesNew.style.top = "250px";
peekTile(images, imagesNew);
};和interval，用于更改图像(它写在ready函数中)：
setInterval(function () { changeImage() }, 4000);回答 1
Stack Overflow用户
回答已采纳
发布于 2013-05-07 12:15:17
当您调用document.querySelector时，它将只返回第一个匹配的元素，在本例中，它将是第一个列表项。如果你想让任何随机的项目具有动画效果，只需调用document.querySelectorAll(".item")，从结果列表中选择一个随机项目，然后对其调用querySelector('.item-image')，就像你现在所做的那样。
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/16397990
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