小程序内实现扫码识别跳转功能_小程序内扫码跳转界面怎么设置scancode

小程序内实现扫码识别跳转功能

在小程序内实现实时扫描并识别二维码的功能
小程序内要实现实时扫码类似微信扫一扫功能，没有废话，只有干货

wxml文件

<view class="backModel" wx:if="{{AwardModelphoto}}">
    <view class="back-content1" style="color: #fff;">
      <camera device-position="back" flash="off" binderror="error" style="width: 100%; height: 1500rpx;border: 1rpx solid #fff;" mode="scanCode" bindscancode="changeCode" frame-size="medium" resolution="high">   
      //其中的参数可以参考微信开放文档自行设置(https://developers.weixin.qq.com/miniprogram/dev/component/camera.html)
        <view class="blue-line" wx:if="{{showLine}}"></view>			//扫码时的一条动态线，可有可无
      </camera>
      <canvas canvas-id="mycanvas" class="mycanvas" style="width: 750rpx;height: 1500rpx;"> </canvas>   //将carmera的图片数据画在canvas上
    </view>
  </view>
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js文件 camera获取图片数据用canvas绘制出图片并上传到本地服务器

var that;
var listener;   //声明一个监听参数
page({
	data:{
		cameraCtx:'',
		AwardModelphoto:false
	},
	onLoad(){
		that =this;
	},
	//扫码识别点击事件
	getQrCode(e){
		var s= e.detail.result;
   		var qrcode=s.substring(s.lastIndexOf("/")+1);   
   		this.cameraCtx= wx.createCameraContext();     
	    listener = this.cameraCtx.onCameraFrame((frame) => {
	        const data = new Uint8ClampedArray(frame.data);   
	        listener.stop()			//扫码成功后停止扫码
	        let destWidth = (frame.width)*0.8   //输出的图片宽度
	        let destHeight = (frame.height)*0.8    //输出的图片高度
	          wx.canvasPutImageData({         //把获取到的imageData数据绘制到canvas上
	            canvasId: 'mycanvas',
	            x: 0,
	            y: 0,
	            width: frame.width,
	            height: frame.height,
	            data: data,
	            success(res) {
	              wx.canvasToTempFilePath({
	                x: 0,
	                y: 0,
	                width: frame.width,
	                height: frame.height,
	                destWidth: destWidth,
	                destHeight: destHeight,
	                canvasId: 'mycanvas',
	                fileType:'jpg',
	                success(res) {
	                  wx.showLoading({
	                    title: '上传中...',
	                    mask:true
	                  })
	                  let tempFilePaths = []
	                  let token = util.getStorageSync(token)
	                  tempFilePaths.push(res.tempFilePath)
	                  wx.uploadFile({
	                    url: url,  //上传路径
	                    filePath: tempFilePaths[0],
	                    name: 'files',
	                    formData: {
	                      'token': token
	                    },
	                    success: function (res) {
	                      wx.hideLoading()
	                      if (res.flag) {
	                        wx.showToast({
	                          title: "上传图片失败",
	                          icon: 'none',
	                          duration: 2000
	                        });
	                        return;
	                      }
	                      var imgs = JSON.parse(res.data);
	                      var tempFilePaths = imgs.data.image;
	                      util.setStorageSync("qrcodeImg", tempFilePaths)   //将上传后的图片进行保存
	                      that.setData({
	                        src: tempFilePaths,
	                        AwardModelphoto:false
	                      })
	                    },
	                    fail(e){
	                      console.log(e,'上传失败');
	                      listener.stop()
	                      wx.hideLoading()
	                    }
	                  })
	                },
	                fail(e){
	                  console.log(e,'自定义扫码失败');
	                }
	              })
	            },
	            fail(e){
	              listener.stop()
	            }
	          })
	    })
    listener.start()
	}
})
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wxml如下

.backModel{
  position: fixed;
  left: 0;
  right: 0;
  top: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.6);
  z-index: 50;
}
.back-content1{
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  bottom: 0;
  width: 750rpx;
  z-index: 51;
}
.blue-line{
  position: absolute;
  top: 200rpx;
  left: 0;
  right: 0;
  width: 600rpx;
  margin: auto;
  border: 2rpx solid #25f848;			//线的颜色
  box-shadow: 0rpx 0 15rpx #3ef75d;
  animation: updown 3s infinite;
  z-index: 56;
}
@keyframes updown{
  from {top: 200rpx;}
  to {top: 1000rpx;}
}
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这就是全部的代码了，有需要的可以点赞+收藏