问题描述
概述
对于我的学校项目,我必须使用 HTML、CSS 和 Javascript 创建动画。我刚刚开始学习如何编码,所以我对这些项目很陌生。我已经能够让 mario 的图像在屏幕上移动然后向后移动,但是我希望图像在到达容器的开始和结束时翻转。我不知道该怎么做,如果有人能帮助我,我将不胜感激。
var objX = 0;
var change = 10;
function moveBlock() {
var obj = document.getElementById("object");
if ((objX + 251) > 1100) {
change = -10;
} else if (objX == 0) {
change = 10;
}
objX = objX + change;
obj.style.left = objX + "px";
}
.rotate {
animation: rotation 8s infinite linear;
}
@keyframes rotation {
from {
transform: rotate(0deg);
}
to {
transform: rotate(359deg);
}
}
#grass {
width: 1100px;
height: 100px;
margin-top: 0px;
position: relative;
background-color: green;
}
#container {
width: 1100px;
height: 320px;
margin-top: 0px;
position: relative;
background-color: white;
}
#object {
width: 251px;
height: 320px;
margin-top: 0px;
position: absolute;
background-image: url("https://i.stack.imgur.com/e7Hib.png")
}
<h1>Layers and animation</h1>
<img src="https://i.imgur.com/kDDFvUp.png" class="rotate" width="100" height="100" />
<img src="https://i.imgur.com/kDDFvUp.png" class="rotate" width="100" height="100" />
<img src="https://i.imgur.com/kDDFvUp.png" class="rotate" width="100" height="100" />
<img src="https://i.imgur.com/kDDFvUp.png" class="rotate" width="100" height="100" />
<img src="https://i.imgur.com/kDDFvUp.png" class="rotate" width="100" height="100" />
<img src="https://i.imgur.com/kDDFvUp.png" class="rotate" width="100" height="100" />
<img src="https://i.imgur.com/kDDFvUp.png" class="rotate" width="100" height="100" />
<img src="https://i.imgur.com/kDDFvUp.png" class="rotate" width="100" height="100" />
<img src="https://i.imgur.com/kDDFvUp.png" class="rotate" width="100" height="100" />
<img src="https://i.imgur.com/kDDFvUp.png" class="rotate" width="100" height="100" />
<img src="https://i.imgur.com/kDDFvUp.png" class="rotate" width="100" height="100" />
<div id="container">
<div id="object"></div>
</div>
<div id="grass"></div>
<br/>
<button onclick="setInterval(moveBlock,25)">Click Me</button>
https://i.stack.imgur.com/e7Hib.png
解决方法
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