vue + any-touch实现一个iscroll 实现拖拽和滑动动画效果

 
 
 .any-scroll-view { position: relative; width: 100%; height: 90vh; overflow: hidden; &__body { transition-timing-function: cubic-bezier(0.1, 0.57, 0.1, 1); background: #eee; position: absolute; width: 100%; height: 100%; } } import AnyTouch from 'any-touch'; export default { name: 'any-scroll-view', props: { // 减速度, 单位px/s² acceleration: { type: Number, default: 3600 } }, data() { return { scrollTop: 0, scrollLeft: 0, transitionDuration: 300 }; }, computed: { bodyStyle() { return { transitionDuration: `${this.transitionDuration}ms`, transform: `translate(${this.scrollLeft}px, ${ this.scrollTop }px)` }; } }, mounted() { const at = new AnyTouch(this.$el); // 第一次触碰 at.on('inputstart', (ev) => { this.stopRoll(); }); // 拖拽开始 at.on('panstart', (ev) => { this.move(ev); }); // 拖拽中 at.on('panmove', (ev) => { this.move(ev); }); // 快速滑动 at.on('swipe', (ev) => { this.decelerate(ev); }); this.$on('hook:destroy', () => { at.destroy(); }); }, methods: { // https://github.com/nolimits4web/swiper/blob/master/dist/js/swiper.esm.js#L87 // https://github.com/nolimits4web/Swiper/blob/master/src/utils/utils.js#L25 getCurrentTranslate() { const style = getComputedStyle(this.$refs.body, null); const { transform } = style; const array = transform.match(/(\-?)(\d)+(\.\d{0,})?/g); return { x: Math.round(array[4]), y: Math.round(array[5]) }; }, stopRoll() { const { x, y } = this.getCurrentTranslate(); this.moveTo({ scrollTop: y, scrollLeft: x }); }, /** * 移动body * @param {Object} 拖拽产生的数据 * @param {Number} deltaX: x轴位移变化 * @param {Number} deltaY: y轴位移变化 */ move({ deltaX, deltaY }, transitionDuration = 0) { this.transitionDuration = transitionDuration; this.scrollLeft += deltaX; this.scrollTop += deltaY; }, /** * 移动到 */ moveTo({ scrollTop, scrollLeft }, transitionDuration = 0) { this.transitionDuration = transitionDuration; this.scrollLeft = scrollLeft; this.scrollTop = scrollTop; }, /** * 拖拽松手后减速移动至停止 * velocityX/Y的单位是px/ms */ decelerate(ev) { const directionSign = { up: -1, right: 1, down: 1, left: -1 }[ ev.direction ]; // Top? | Left? let SCROLL_SUFFIX = 'Top'; // x ? | y? let AXIS_SUFFIX = 'Y'; if (ev.velocityX > ev.velocityY) { SCROLL_SUFFIX = 'Left'; AXIS_SUFFIX = 'X'; } // 减速时间, 单位ms // t = (v₂ - v₁) / a const velocity = ev[`velocity${AXIS_SUFFIX}`]; this.transitionDuration = Math.round( ((velocity * 1000) / this.acceleration) * 1000 ); // 滑动距离 // s = (v₂² - v₁²) / (2 * a) const scrollAxis = `scroll${SCROLL_SUFFIX}`; this[scrollAxis] += directionSign * Math.round( Math.pow(velocity * 1000, 2) / (2 * this.acceleration) ); } } };