纯javascript实现360度旋转预览图片特效

PetitQ 图片/图形 2019-6-17 2.19K 0 0

这是一款纯 js 实现 360 度旋转预览图片特效。该 js 特效仅使用 120 行代码，即可实现通过滑块、或鼠标手动 360 度旋转图片，以及自动 360 度旋转图片的效果。

HTML 结构

```
<div class="tabs">
```

<input type="radio" name="tabs" id="sol1" checked="checked"/>

```
<label for="sol1">Range</label>
```
```
<div class="tab">
```
```
<div class="frame" id="frame1"></div>
```

<input type="range" id="slider" min="0" max="34" step="1" value="0"/>

```
</div>
```

<input type="radio" name="tabs" id="sol2"/>

```
<label for="sol2">Drag / Swipel</label>
```
```
<div class="tab">
```
```
<div class="frame" id="frame2"></div>
```
```
</div>
```

<input type="radio" name="tabs" id="sol3">

```
<label for="sol3">Canvas</label>
```
```
<div class="tab">
```

<canvas class="frame" id="frame3"></canvas>

```
</div>
```
```
</div>
```
```
<div id="overlay">Loading...</div>
```

也想出现在这里？联系我们吧

CSS 样式

```
body {
```
```
  margin: 0;
```
```
  padding: 0;
```
```
  font-size: .8em;
```
```
  font-family: 'Open Sans', sans-serif;
```
```
  overflow: hidden;
```
```
}
```
```
body .tabs {
```
```
  position: absolute;
```
```
  left: 50%;
```
```
  top: 50%;
```
```
  transform: translate(-50%, -50%);
```
```
  width: 480px;
```
```
  height: 351px;
```
```
}
```
```
body .tabs label {
```
```
  cursor: pointer;
```
```
  border-radius: 4px;
```
```
}
```
```
body .tabs input[name="tabs"] {
```
```
  display: none;
```
```
}
```

body .tabs input[name="tabs"]:checked + label {

```
  background: #44abda;
```
```
  color: #fff;
```
```
}
```

body .tabs input[name="tabs"]:checked + label + .tab {

```
  display: block;
```
```
}
```
```
body .tabs label {
```
```
  display: inline-block;
```
```
  width: 33.3333%;
```
```
  float: left;
```
```
  height: 24px;
```
```
  line-height: 24px;
```
```
  text-align: center;
```
```
}
```
```
body .tabs .tab {
```
```
  display: none;
```
```
  position: absolute;
```
```
  width: 100%;
```
```
  height: 327px;
```
```
  top: 24px;
```
```
  text-align: center;
```
```
}
```
```
body .tabs .tab .frame {
```
```
  width: 100%;
```
```
  height: 100%;
```
```
}
```
```
body .tabs .tab #slider {
```
```
  width: calc(100% - 80px);
```
```
}
```
```
body #overlay {
```
```
  position: absolute;
```
```
  width: 100%;
```
```
  height: calc(100% - 20px);
```
```
  background: rgba(0, 0, 0, 0.3);
```
```
  text-align: center;
```
```
  color: #fff;
```
```
  font-size: 1.1em;
```
```
  padding-top: 20px;
```
```
}
```

javascript

let frame1 = document.getElementById('frame1'),

    frame2 = document.getElementById('frame2'),

    frame3 = document.getElementById('frame3'),

    labels = document.querySelectorAll('label'),

```
    ctx = frame3.getContext('2d'),
```

    slider = document.getElementById('slider'),

```
    frameWidth = 480,
```
```
    frameHeight = 327,
```
```
    activeFrame = 0,
```
```
    frames = 34,
```
```
    xStart = null,
```
```
    s2Settings = {
```
```
        sensitivity: 40
```
```
    },
```
```
    s3Settings = {
```
```
        fps: 20,
```
```
        reverse: false
```
```
    },
```
```
    now, delta, then = Date.now(),
```

    interval = 1000 / s3Settings.fps,

```
    runCanvas = false;
```
```
 
```
```
let gui = new dat.GUI(),
```
```
    s2 = gui.addFolder('Drag / Swipe'),
```
```
    s3 = gui.addFolder('Canvas');
```
```
 
```

s2.add(s2Settings, "sensitivity", 10, 80, 1);

s3.add(s3Settings, "fps", 1, 60, 1).onChange(() =gt; {interval = 1000 / s3Settings.fps;});

```
s3.add(s3Settings, "reverse");
```
```
 
```
```
s2.open();
```
```
s3.open();
```
```
 
```
```
let sprite = new Image();
```
```
sprite.onload = function() {
```

    frame1.style.background = frame2.style.background = `url(${sprite.src})`;

    document.getElementById('overlay').style.display = 'none';

```
 
```
```
    solution1(); //input range
```
```
    solution2(); // drag / swipe
```
```
    solution3(); // canvas
```
```
 
```
```
    labels.forEach(function(element) {
```

      element.addEventListener('click', function() {

```
          runCanvas = false;
```

          if(this.getAttribute('for') == "sol3")

```
              runCanvas = true;
```
```
      });
```
```
    });
```
```
};
```

sprite.src = 'https://serving.photos.photobox.com/\

55967562d176c08ff2d7e23195f94e704faa7feede75617ac5\

```
905d8dca9295f1a547077a.jpg';
```
```
 
```
```
function solution1() {    
```

    slider.addEventListener("input", function() {

        activeFrame = parseInt(this.value);

        frame1.style.backgroundPositionX = `-${activeFrame * frameWidth}px`;

```
    });
```
```
}
```
```
 
```
```
function solution2() {
```

    frame2.addEventListener('touchstart', (e) =gt; {

        xStart = e.touches ? e.touches[0].clientX : e.clientX;

```
    });
```

    frame2.addEventListener('mousedown', (e) =gt; {

        xStart = e.touches ? e.touches[0].clientX : e.clientX;

```
    });
```

    frame2.addEventListener('touchend', () =gt; { xStart = null; });

    frame2.addEventListener('mouseup', () =gt; { xStart = null; });

    frame2.addEventListener("mousemove", move);

    frame2.addEventListener("touchmove", move);

```
}
```
```
 
```
```
function move(e) {
```
```
    if(!xStart)
```
```
        return;
```
```
 
```

    let xEnd = e.touches ? e.touches[0].clientX : e.clientX;

    if (xStart - xEnd gt; .5 * frameWidth / (10 + s2Settings.sensitivity)) {

```
        activeFrame++;
```
```
        if(activeFrame gt; frames)
```
```
            activeFrame = 0;
```

        frame2.style.backgroundPositionX = `${activeFrame * frameWidth}px`;

```
        xStart = xEnd;
```

    } else if(xEnd - xStart gt; .5 * frameWidth / (10 + s2Settings.sensitivity)) {

```
        activeFrame--;
```
```
        if(activeFrame lt; 0)
```
```
            activeFrame = frames;
```

        frame2.style.backgroundPositionX = `${activeFrame * frameWidth}px`;

```
        xStart = xEnd;
```
```
    }
```
```
}
```
```
 
```
```
function solution3() {
```
```
    frame3.width = frameWidth;
```
```
    frame3.height = frameHeight;
```
```
    animate();
```
```
}
```
```
 
```
```
function animate() { 
```
```
    now = Date.now();
```
```
    delta = now - then;
```
```
 
```

    if(runCanvas && delta gt; interval) {

```
        if(activeFrame gt; frames)
```
```
            activeFrame = 0;
```
```
        else if(activeFrame lt; 0)
```
```
            activeFrame = frames;
```
```
 
```
```
        ctx.drawImage(
```

            sprite, activeFrame * frameWidth, 0, frameWidth, frameHeight,

            0, 0, frameWidth, frameHeight

```
        );
```
```
 
```

        activeFrame += (s3Settings.reverse) ? -1 : 1;

        then = now - (delta % interval);

```
    }
```

    window.requestAnimationFrame(animate);

```
}
```

Codepen 网址：https://codepen.io/_massimo/pen/zVYVNb

纯 javascript 实现 360 度旋转预览图片特效

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图片/图形

纯javascript实现360度旋转预览图片特效

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纯 javascript 实现 360 度旋转预览图片特效

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