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| // component/mygallery/mygallery.js
| Component({
| options: {
| addGlobalClass: true
| },
| properties: {
| imgUrls: {
| type: Array,
| value: [],
|
| observer(newVal) {
| this.setData({
| currentImgs: newVal
| });
| }
|
| },
| title: {
| type: String,
| value: ''
| },
| remark: {
| type: String,
| value: ''
| },
| show: {
| type: Boolean,
| value: true,
|
| observer(newVal) {
| if (newVal) {
| let that = this;
| let query = this.createSelectorQuery().in(this); //必须要先创建一个查询
| setTimeout(() => {
| query.select('.fyui-gallery__img').boundingClientRect(function (rect) {
| that.setData({
| imgHeight: rect.height,
| imgWidth: rect.width,
| xLimit: [0, 0],
| yLimit: [0, 0],
| });
| }).exec();
| }, 500);
| }
| }
| },
| current: {
| type: Number,
| value: 0
| },
| hideOnClick: {
| type: Boolean,
| value: true
| },
| extClass: {
| type: String,
| value: ''
| }
| },
| data: {
| currentImgs: [],
| tabList: [],
| pageList: [],
| showRemark: true,
|
| imgHeight: 0, //图片高度
| imgWidth: 0, //图片宽度
| xLimit: [], //缩放后x轴移动范围
| yLimit: [], //缩放后y轴移动范围
| translateX: 0, // 位移x坐标 单位px
| translateY: 0, // 位移y坐标 单位px
| distance: undefined, // 双指接触点距离
| scale: 1, // 缩放倍数
| endScale: 1,
| rotate: 0, // 旋转角度
| oldRotate: 0, // 上一次旋转停止后的角度
| startMove: { // 起始位移距离
| x: 0,
| y: 0,
| },
| startTouches: [] // 起始点touch数组
| },
|
| pageLifetimes: {
| // 组件所在页面的生命周期函数
| show: function () {
|
| },
| },
|
| ready() {
| const data = this.data;
| this.setData({
| currentImgs: data.imgUrls
| });
| },
|
| methods: {
| change(e) {
| this.setData({
| current: e.detail.current
| });
| this.triggerEvent('change', {
| current: e.detail.current
| }, {});
|
| //图片复位
| this.setData({
| scale: 1,
| translateX: 0,
| translateY: 0,
| rotate: 0
| })
| },
|
| deleteImg() {
| const data = this.data;
| const imgs = data.currentImgs;
| const url = imgs.splice(data.current, 1);
| this.triggerEvent('delete', {
| url: url[0],
| index: data.current
| }, {});
|
| if (imgs.length === 0) {
| // @ts-ignore
| this.hideGallery();
| return;
| }
|
| this.setData({
| current: 0,
| currentImgs: imgs
| });
| },
|
| hideGallery() {
| const data = this.data;
|
| if (data.hideOnClick) {
| this.setData({
| show: false,
| scale: 1,
| endScale: 1,
| showRemark: true,
| translateX: 0,
| translateY: 0,
| rotate: 0
| });
| this.triggerEvent('hide', {}, {});
| }
| },
|
| /**
| * 底部图片导航栏选择事件
| */
| swichNav(e) {
| var that = this;
| if (this.data.currentTab === e.target.dataset.current) {
| return false;
| } else {
| that.setData({
| current: e.target.dataset.current,
| })
| }
| },
|
| /**
| * 底部图片导航栏、文本显隐事件
| */
| toggle() {
| const showRemark = !this.data.showRemark
| this.setData({
| showRemark
| })
| },
|
| rotateImg(e) {
| const clockwise = e.currentTarget.dataset.clockwise
| let rotate = this.data.rotate
| if (clockwise) {
| rotate += 90
| } else {
| rotate -= 90
| }
| rotate = rotate > 360 ? rotate - 360 : rotate
| rotate = rotate < 0 ? rotate + 360 : rotate
|
| const imgWidth = this.data.imgHeight
| const imgHeight = this.data.imgWidth
| this.setData({rotate, imgWidth, imgHeight})
| },
|
| touchStart(e) {
| const touches = e.touches
| const { translateX, translateY } = this.data
| const { clientX, clientY } = touches[0]
| this.setData({
| startMove:{
| x: clientX - translateX,
| y: clientY - translateY
| }
| })
| this.setData({
| startTouches:touches,
| })
| },
|
| touchMove(e) {
| const touches = e.touches
| const { clientX: onePageX, clientY: onePageY } = touches[0]
| const { startMove, scale, distance: oldDistance, startTouches, oldRotate } = this.data
| if (touches.length === 2 && startTouches.length === 2) {
| // 双指缩放
| const { pageX: twoPageX, pageY: twoPageY } = touches[1]
| // 求出当前双指距离
| const distance = Math.sqrt((twoPageX - onePageX) ** 2 + (twoPageY - onePageY) ** 2)
| this.setData({distance})
|
| // 双指旋转
| let rotate = this.getAngle(touches[0], touches[1]) - this.getAngle(startTouches[0], startTouches[1]) + oldRotate
| // 如果大于360度，就减去360
| rotate = rotate > 360 ? rotate - 360 : rotate
|
| this.setData({
| scale: scale * (distance / (oldDistance || distance)),
| // rotate
| })
| } else if (scale > 1 && startTouches.length !== 2) {
| // 单指拖拽
| // const xL = this.data.xLimit
| // const yL = this.data.yLimit
| let x = onePageX - startMove.x
| let y = onePageY - startMove.y
| // if (x < xL[0]) {
| // x = xL[0]
| // } else if (x > xL[1]) {
| // x = xL[1]
| // }
| // if (y < yL[0]) {
| // y = yL[0]
| // } else if (y > yL[1]) {
| // y = yL[1]
| // }
| this.setData({
| translateX: x,
| translateY: y
| })
| }
| },
| getAngle(p1, p2) {
| const x = p1.clientX - p2.clientX
| const y = p1.clientY- p2.clientY
| return Math.atan2(y, x) * 180 / Math.PI
| },
| touchEnd() {
| // 保存当前旋转角度，清空双指距离
| const oldRotate = this.data.rotate
| this.setData({
| oldRotate,
| distance: undefined,
| })
| // 最小缩放为1倍，同时图片移动复位
| if (this.data.scale < 1) {
| this.setData({
| scale: 1,
| translateX: 0,
| translateY: 0
| })
| }
|
| // 保存最后缩放的倍率
| const s = this.data.scale
| this.setData({
| endScale: s,
| })
|
| // 计算当前缩放倍率下，图片可移动范围
| const h = this.data.imgHeight
| const w = this.data.imgWidth
| const sH = h * s
| const sW = w * s
| const rH = (sH - h) / 2
| const rW = (sW - w) / 2
| const xLimit = [-rW, rW]
| const yLimit = [-rH, rH]
| this.setData({
| xLimit,
| yLimit
| })
|
| let that = this;
| let query = this.createSelectorQuery().in(this); //必须要先创建一个查询
| query.select('.fyui-gallery__img').boundingClientRect(function (rect) {
| }).exec();
|
| // 缩放后回归至当前移动位置
| let translateX = this.data.translateX
| let translateY = this.data.translateY
| const xL = this.data.xLimit
| const yL = this.data.yLimit
| if (translateX < xL[0]) {
| translateX = xL[0]
| } else if (translateX > xL[1]) {
| translateX = xL[1]
| }
| if (translateY < yL[0]) {
| translateY = yL[0]
| } else if (translateY > yL[1]) {
| translateY = yL[1]
| }
| this.setData({ translateX, translateY})
| },
|
| }
| })
|
|
