移動端常見問題（動畫演示）

怡紅公子0526 2020-07-25

展開全文

移動端動畫

紅色勾勾代表強(qiáng)烈推薦

transition實現(xiàn)動畫案例：

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>移動端動畫</title>
    <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, minimum-scale=1, user-scalable=no">
    <style>
        *{padding:0;margin:0;}
        .box{width:100px;height: 100px;background-color: pink;transition:transform 1s;}
    </style>
</head>
<body>
    <button id="btn">start</button>
    <div class="box" id="box"></div>

    <script>
        var btn=document.getElementById("btn"),
            box=document.getElementById("box"),
            dest=window.innerWidth-100;//移動的距離

            btn.addEventListener("click",function(){
                box.style.transform="translate3d("+dest+"px,0,0)";
            },false);    
    </script>
</body>
</html>

也可以提取成函數(shù)的寫法：

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>移動端動畫</title>
    <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, minimum-scale=1, user-scalable=no">
    <style>
        *{padding:0;margin:0;}
        .box{width:100px;height: 100px;background-color: pink;transition:transform 1s;}
    </style>
</head>
<body>
    <button id="btn">start</button>
    <div class="box" id="box"></div>

    <script>
        var btn=document.getElementById("btn"),
            box=document.getElementById("box"),
            dest=window.innerWidth-100;//移動的距離

            btn.addEventListener("click",function(){
                move(box,dest);
            },false);    

            function move(el,pos){
                el.style.transform="translate3d("+pos+"px,0,0)";
            }
    </script>
</body>
</html>

animation動畫推薦一個animation庫，animation.js https://daneden./animate.css/

可以查看各種動畫的樣式：

一般情況下推薦使用css3的transition和animation來完成動畫，如果不能滿足需求，可以考慮js的requestAnimationFrame

不做css動畫時，記得一定要去掉transition屬性

requestAnimationFrame的特點是：調(diào)用一次只執(zhí)行一幀；如果想要持續(xù)執(zhí)行，就需要遞歸。

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>移動端動畫</title>
    <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, minimum-scale=1, user-scalable=no">
    <style>
        *{padding:0;margin:0;}
        .box{width:100px;height: 100px;background-color: pink;}
    </style>
</head>
<body>
    <button id="btn">start</button>
    <div class="box" id="box"></div>

    <script>
        //requestAnimationFrame的兼容性處理    
        var requestAnimationFrame=window.requestAnimationFrame||
        window.webkitRequestAnimationFrame||
        window.mozRequestAnimationFrame||
        window.msRequestAnimationFrame||
        window.oRequestAnimationFrame||
        function(fn){
            setTimeout(fn,16);
        }

        var btn=document.getElementById("btn"),
            box=document.getElementById("box"),
            dest=window.innerWidth-100,//移動的距離
            speed=1,
            pos=0;

        btn.addEventListener("click",function(){
            requestAnimationFrame(step);
        },false);    

        function move(el,pos){
            el.style.transform="translate3d("+pos+"px,0,0)";
        }

        function step(){
            if(pos<dest){
                //遞歸
                pos+=speed;
                move(box,pos);
                requestAnimationFrame(step);
            }else{
                pos=dest;
                move(box,pos);
            }
        }
    </script>
</body>
</html>