WXML
<view class="qianzi"> <view class="paper"> <canvas class="handWriting" disable-scroll="true" bindtouchstart="touchstart1" bindtouchmove="touchmove1" canvas-id="handWriting1"> </canvas> </view> <view class="signBtn"> <button class="btn1" size="" bindtap="sign1ok">完成签字</button> <button class="btn2" size="" bindtap="reSign1">清除签名</button> </view> </view> <view class="image" hidden="{{src?false:true}}"> <image src="{{src}}"></image> </view>
JS
data: { optionsTaskid: '', //接收到的任务id orderKey: '', context1: null, hasDraw: false, //默认没有画 src: null, },sign1ok: function () { var that = this; if (!that.data.hasDraw) { return app.Tips({ title: "您还未签名" }) }; var context1 = that.data.context1; context1.draw(true, wx.canvasToTempFilePath({ canvasId: 'handWriting1', success(res) { console.log("res:", res) console.log(res.tempFilePath) //得到了图片下面自己写上传吧 let Url = getApp().globalData.url, header = HEADER; console.log("Url:", Url) if (getApp().globalData.token) header[TOKENNAME] = 'Bearer ' + getApp().globalData.token; wx.uploadFile({ url: Url + "/api/task/upload/contract", filePath: res.tempFilePath, name: "file", formData: { file: "image", key: that.data.orderKey }, header: { "Content-Type": "multipart/form-data", [TOKENNAME]: 'Bearer ' + getApp().globalData.token }, success: function (result) { console.log(result) var data = JSON.parse(result.data) if (data.status == 200) { app.Tips({ title: data.msg }); setTimeout(function () { wx.redirectTo({ url: '/pages/shouerlige/taskOrder_pay/index?key=' + that.data.orderKey + "&taskid=" + that.data.optionsTaskid, }) }, 1200) }else{ return app.Tips({title:data.msg}) } }, fail:function(err){ } }) } })) },
touchstart1: function (e) { var context1 = this.data.context1; context1.moveTo(e.touches[0].x, e.touches[0].y); this.setData({ context1: context1, hasDraw: true, //要签字了 }); }, touchmove1: function (e) { var x = e.touches[0].x; var y = e.touches[0].y; var context1 = this.data.context1; context1.setLineWidth(3); context1.lineTo(x, y); context1.stroke(); context1.setLineCap('round'); context1.draw(true); context1.moveTo(x, y); }, reSign1: function () { //重新画 var that = this; var context1 = that.data.context1; context1.draw(); //清空画布 that.setData({ hasDraw: false, //没有画 src: null }); },