88 lines
2.8 KiB
JavaScript
88 lines
2.8 KiB
JavaScript
import {baseUrl, URL_CONFIG} from '../../assets/js/project.config'
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Page({
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data: {
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context1: null,
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hasDraw:false, //默认没有画
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id: '',
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},
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onLoad: function() {
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var context1 = wx.createCanvasContext('handWriting1');
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context1.setStrokeStyle("#000000") // 画笔的颜色
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context1.setLineWidth(3); // 画笔的线条宽度
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this.setData({
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context1: context1,
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})
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},
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touchstart1: function(e) {
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var context1 = this.data.context1;
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context1.moveTo(e.touches[0].x, e.touches[0].y); // 把画笔的开始点移到当前触摸点
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this.setData({
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// context1: context1,
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hasDraw : true, //要签字了
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});
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},
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touchmove1: function(e) {
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var x = e.touches[0].x;
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var y = e.touches[0].y;
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var context1 = this.data.context1;
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context1.setLineWidth(3);
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context1.lineTo(x, y); // 移动绘制的点（关键步骤）
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context1.stroke(); // 画出当前路径的边框====创建线条
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context1.setLineCap('round'); // 设置线条的端点样式
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context1.draw(true); // 将之前在绘图上下文中的描述（路径、变形、样式）画到 canvas 中
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context1.moveTo(x, y); // 把路径移动到画布中的指定点，不创建线条
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},
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reSign1: function() { //重新画
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var that = this;
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var context1 = that.data.context1;
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context1.draw(); //清空画布
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that.setData({
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hasDraw: false, //没有画
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src: null
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});
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},
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sign1ok: function () {
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const that = this;
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if(!that.data.hasDraw){
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console.log("签字是空白的 没有签字")
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}else{
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var context1 = that.data.context1;
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context1.draw(true, wx.canvasToTempFilePath({ // 把当前画布指定区域的内容导出生成指定大小的图片。在 draw() 回调里调用该方法才能保证图片导出成功
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canvasId: 'handWriting1',
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success(res) { // 完成签字
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//得到了图片 上传到服务器
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wx.uploadFile({
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url: baseUrl + URL_CONFIG + "/sys/common/upload",
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filePath: res.tempFilePath,
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name: "file",
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formData: {
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filetype: "image",
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},
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success: function (result) {
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let data = JSON.parse(result.data)
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that.setData({
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id: data.result.id
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})
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let pages = getCurrentPages();
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let prevPage = pages[pages.length - 2];
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//将数值信息赋值给上一页面id变量
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prevPage.setData({
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fileId: data.result.id,
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src: res.tempFilePath
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});
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wx.navigateBack({
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delta: 1,
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})
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},
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fail: function(err){
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wx.showToast({
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title: '上传失败',
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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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},
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});
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