旋转圆环控制器 h5+js+css实现_js圆形刻度旋转特效-优快云博客

本文链接：https://blog.youkuaiyun.com/luoruowen/article/details/143748037
<!DOCTYPE html>
<html lang="zh">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>旋转圆环控制器</title>
    <style>
        body {
            font-family: Arial, sans-serif;
            display: flex;
            justify-content: center;
            align-items: center;
            height: 100vh;
            background-color: #282c34;
            color: white;
        }
        .ring-container {
            position: relative;
            width: 250px;
            height: 250px;
            border-radius: 50%;
            border: 10px solid #ff7e5f;
            display: flex;
            justify-content: center;
            align-items: center;
        }
        .handle {
            position: absolute;
            width: 20px;
            height: 20px;
            background: #fff;
            border-radius: 50%;
            cursor: pointer;
            box-shadow: 0 0 5px rgba(0, 0, 0, 0.5);
            z-index: 10;
        }
        .tick {
            position: absolute;
            width: 2px;
            height: 15px;
            background: #fff;
            transform-origin: bottom center;
        }
        .small-tick {
            height: 8px;
            background: #aaa;
        }
        .label {
            position: absolute;
            transform-origin: bottom center;
            font-size: 12px;
            color: #fff;
        }
    </style>
</head>
<body>
<div class="ring-container" id="ringContainer">
    <div class="handle" id="handle"></div>
    <!-- 添加大刻度和标签 -->
    <div class="tick" style="transform: rotate(0deg) translateY(-115px);"></div>
    <div class="label" style="transform: rotate(0deg) translateY(-135px);">0</div>
    <div class="tick" style="transform: rotate(90deg) translateY(-115px);"></div>
    <div class="label" style="transform: rotate(90deg) translateY(-135px);">90</div>
    <div class="tick" style="transform: rotate(180deg) translateY(-115px);"></div>
    <div class="label" style="transform: rotate(180deg) translateY(-135px);">180</div>
    <div class="tick" style="transform: rotate(270deg) translateY(-115px);"></div>
    <div class="label" style="transform: rotate(270deg) translateY(-135px);">270</div>
    <!-- 添加小刻度 -->
    <div class="tick small-tick" style="transform: rotate(30deg) translateY(-115px);"></div>
    <div class="tick small-tick" style="transform: rotate(60deg) translateY(-115px);"></div>
    <div class="tick small-tick" style="transform: rotate(120deg) translateY(-115px);"></div>
    <div class="tick small-tick" style="transform: rotate(150deg) translateY(-115px);"></div>
    <div class="tick small-tick" style="transform: rotate(210deg) translateY(-115px);"></div>
    <div class="tick small-tick" style="transform: rotate(240deg) translateY(-115px);"></div>
    <div class="tick small-tick" style="transform: rotate(300deg) translateY(-115px);"></div>
    <div class="tick small-tick" style="transform: rotate(330deg) translateY(-115px);"></div>
</div>
<script>
    const handle = document.getElementById('handle');
    const ringContainer = document.getElementById('ringContainer');
    let isDragging = false;
    let currentAngle = 0;

    function getAngle(x, y) {
        return Math.atan2(y - ringContainer.offsetHeight / 2, x - ringContainer.offsetWidth / 2) * (180 / Math.PI);
    }

    function updateHandlePosition(angle) {
        const radius = 115; // 半径
        const radian = angle * (Math.PI / 180);
        const x = radius * Math.cos(radian);
        const y = radius * Math.sin(radian);
        handle.style.transform = `translate(${x}px, ${y}px)`;
    }

    ringContainer.addEventListener('mousedown', (e) => {
        isDragging = true;
    });

    document.addEventListener('mouseup', () => {
        isDragging = false;
    });

    document.addEventListener('mousemove', (e) => {
        if (isDragging) {
            const angle = getAngle(e.clientX - ringContainer.offsetLeft, e.clientY - ringContainer.offsetTop);
            currentAngle = angle;
            updateHandlePosition(currentAngle);
            console.log('当前参数值:', (currentAngle + 360) % 360);
        }
    });

    // 支持触摸事件
    ringContainer.addEventListener('touchstart', (e) => {
        isDragging = true;
    });

    document.addEventListener('touchend', () => {
        isDragging = false;
    });

    document.addEventListener('touchmove', (e) => {
        if (isDragging) {
            const touch = e.touches[0];
            const angle = getAngle(touch.clientX - ringContainer.offsetLeft, touch.clientY - ringContainer.offsetTop);
            currentAngle = angle;
            updateHandlePosition(currentAngle);
            console.log('当前参数值:', (currentAngle + 360) % 360);
        }
    });

    // 初始化手柄位置
    updateHandlePosition(currentAngle);
</script>
</body>
</html>