我认为这是可行的,但并非如此。我也不认为这是最好的方法。
定时器是另一个运行的功能,它具有改变图像脉动速率的能力。
我尝试使用gif而不是因为它们具有不同的速度,所以在图像之间切换时没有平滑的过渡。
<!DOCTYPE HTML>
<html>
<head>
<meta charset="utf-8">
<script type="text/javascript" src="https://code.jquery.com/jquery-latest.js"></script>
<style>
#red-square {
position: absolute;
display: inline-block;
z-index: 1;
top : 200px;
right: 200px;
height: 100px;
width: 100px;
background-color: red;
}
</style>
</head>
<body>
<div id="result"></div>
<div id="red-square"></div>
<button onclick="speedOne();">speed one</button>
<button onclick="speedTwo();">speed two</button>
<button onclick="speedThree();">speed three</button>
<script>
var counter = 0,
stopTimeoutTwo = null,
stopTimeoutThree = null,
currentSpeed = "speed one";
function runCounter() {
counter++;
result.textContent = counter;
if(currentSpeed == "speed one") {
if((counter%60) == 0) {
$("#red-square").hide();
}else if((counter%60) != 0) {
$("#red-square").show();
}
}
else if(currentSpeed = "speed two") {
if((counter%45) == 0) {
$("#red-square").hide();
}else if((counter % 45) != 0) {
$("#red-square").show();
}
}else if(currentSpeed = "speed three") {
if((counter%30) == 0) {
$("#red-square").hide();
}else if((counter%30) != 0) {
$("#red-square").show();
}
}
if(counter < 1e5) timer = setTimeout(runCounter, 0);
}
runCounter();
function stepOne() {
currentSpeed = "speed one";
}
function stepTwo() {
currentSpeed = "speed two";
}
function stepThree() {
currentSpeed = "speed three";
}
</script>
</body>
</html>
最佳答案
您可以使用setInterval来创建效果,如下所示: Fiddle!
这是我使用的JS:
var speed = 4000;
var inter;
var square = document.getElementById("red-square");
square.style.backgroundColor = "red";
function myTime(){
inter = setInterval(function(){
console.log(square.style.backgroundColor+" "+speed);
if(square.style.backgroundColor == "red"){
square.style.backgroundColor = "blue";
}
else{
square.style.backgroundColor = "red";
}
}, speed);
}
function changSpeed(s){
clearInterval(inter);
speed = s;
inter=null;
myTime();
}
myTime();
剩下的就是你的代码。
关于javascript - 如何对图像进行脉动并改变脉动率?,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/37845017/