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289 lines
7.1 KiB
289 lines
7.1 KiB
// pagesA/selectFace/selectFace.js
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Page({
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/**
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* 页面的初始数据
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*/
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data: {
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cameraStatus:false,
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imgSrc:'',
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screenW: '',
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width: '',
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height: '',
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distance: '',
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old_width: '',
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old_height: '',
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cut_: '',
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x: 0,
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y: 0,
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crop_pic:''
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},
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/**
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* 生命周期函数--监听页面加载
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*/
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onLoad: function (options) {
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const _this = this
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wx.getSetting({
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success: res => {
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if (res.authSetting['scope.camera']) {
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_this.setData({
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cameraStatus: true
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})
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} else {
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// 用户还没有授权，向用户发起授权请求
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wx.authorize({
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scope: 'scope.camera',
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success() { // 用户同意授权
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_this.setData({
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cameraStatus: true
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})
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},
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fail() { // 用户不同意授权
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_this.openSetting().then(res => {
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_this.setData({
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cameraStatus: true
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})
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})
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}
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})
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}
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},
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fail: res => {
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console.log('获取用户授权信息失败')
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}
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})
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wx.getSystemInfo({
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success: res => {
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const screenH = res.screenHeight,
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screenW = res.screenWidth,
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cut_ = screenW - 4;
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let that = this;
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that.setData({
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screenW: screenW,
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cut_: cut_
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})
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},
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})
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},
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// 打开授权设置界面
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openSetting() {
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const _this = this
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let promise = new Promise((resolve, reject) => {
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wx.showModal({
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title: '授权',
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content: '请先授权获取摄像头权限',
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success(res) {
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if (res.confirm) {
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wx.openSetting({
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success(res) {
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if (res.authSetting['scope.camera']) { // 用户打开了授权开关
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resolve(true)
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} else {
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// 用户没有打开授权开关， 继续打开设置页面
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_this.openSetting().then(res => {
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resolve(true)
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})
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}
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},
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fail(res) {
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console.log(res)
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}
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})
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} else if (res.cancel) {
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_this.openSetting().then(res => {
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resolve(true)
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})
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}
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}
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})
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})
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return promise;
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},
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// 拍照
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takePhoto() {
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var that=this,
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width = that.data.screenW,
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height = that.data.screenW;
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wx.chooseImage({
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count:1,
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sizeType: ['original', 'compressed'],
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sourceType: ['album', 'camera'],
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success:function(res){
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const tempFilePaths = res.tempFilePaths[0];
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wx.getImageInfo({
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src: tempFilePaths,
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success: function(msg) {
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let img_w = msg.width,
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img_h = msg.height,
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scale = img_w / img_h
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//横向图片,宽不变
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//横向图片，高变成固定，宽度自适应
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if (scale > 1) {
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that.setData({
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width: scale * width,
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height: height,
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old_width: scale * width,
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old_height: height,
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imgSrc: tempFilePaths
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})
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} else { //纵向图片，短边是宽，宽变成系统固定，高自适应
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that.setData({
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width: width,
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height: height / scale,
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old_width: width,
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old_height: height / scale,
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imgSrc: tempFilePaths
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})
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}
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}
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})
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},
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fail:function(error){
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console.error("调用本地相册文件时出错")
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console.warn(error)
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},
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complete:function(back){
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console.log(back)
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}
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})
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},
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start: function(res) {
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let that = this;
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if (res.touches.length == 2) {
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let _x = res.touches[1].pageX - res.touches[0].pageX,
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_y = res.touches[1].pageY - res.touches[0].pageY,
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distance = Math.sqrt(Math.pow(_x, 2) + Math.pow(_y, 2));
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that.setData({
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distance: distance
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})
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}
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},
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move: function(res) {
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let that = this;
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console.log(res)
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if (res.touches.length == 2) {
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let _x = res.touches[1].pageX - res.touches[0].pageX,
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_y = res.touches[1].pageY - res.touches[0].pageY,
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old_width = that.data.old_width,
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old_height = that.data.old_height,
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newdistance = Math.sqrt(Math.pow(_x, 2) + Math.pow(_y, 2)),
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width = that.data.width,
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height = that.data.height,
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distance = that.data.distance,
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end_distance = newdistance - distance,
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pic_scale = 1 + end_distance * 0.001;
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that.setData({
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width: width * pic_scale,
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height: height * pic_scale
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})
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let max = width / old_width;
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if (max > 2) {
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that.setData({
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width: old_width * 2,
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height: old_height * 2
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})
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} else if (max < 1) {
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that.setData({
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width: old_width,
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height: old_height
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})
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}
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}
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},
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scroll: function(e) {
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console.log('TOP:' + e.detail.scrollTop + 'Left:' + e.detail.scrollLeft)
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let x = e.detail.scrollLeft,
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y = e.detail.scrollTop,
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that = this;
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that.setData({
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x: x,
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y: y
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})
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},
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crop: function() {
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let that = this,
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img = that.data.imgSrc,
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width = that.data.width,
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height = that.data.height,
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crop = that.data.screenW,
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x = that.data.x,
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y = that.data.y;
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wx.showToast({
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title: 'loading...',
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icon: 'loading',
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duration: 1000
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})
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const canvas = wx.createCanvasContext('canvas');
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canvas.drawImage(img, 0, 0, width, height)
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canvas.draw(setTimeout(() => {
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wx.canvasToTempFilePath({
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x: x,
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y: y,
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width: crop,
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height: crop,
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canvasId: 'canvas',
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success: suc => {
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console.log(suc.tempFilePath)
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that.setData({
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crop_pic: suc.tempFilePath
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})
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},
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fail: err => {
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console.log('err:' + err)
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}
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}, this)
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}, 1000))
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},
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/**
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* 生命周期函数--监听页面初次渲染完成
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*/
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onReady: function () {
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},
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/**
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* 生命周期函数--监听页面显示
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*/
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onShow: function () {
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},
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/**
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* 生命周期函数--监听页面隐藏
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*/
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onHide: function () {
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},
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/**
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* 生命周期函数--监听页面卸载
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*/
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onUnload: function () {
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},
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/**
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* 页面相关事件处理函数--监听用户下拉动作
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*/
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onPullDownRefresh: function () {
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},
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/**
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* 页面上拉触底事件的处理函数
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*/
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onReachBottom: function () {
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},
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/**
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* 用户点击右上角分享
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*/
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onShareAppMessage: function () {
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}
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})
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