uni-app实现扫码

主要用的就是uni.scanCode({})这个函数，
代码如下：

            scan1() {
                 let that = this;
                 // 允许从相机和相册扫码
                 uni.scanCode({
                     success: function(res) {
                         that.result1 = res.result;
                     }
                 });
             },
             scan2() {
                 let that = this;
                 // 只允许通过相机扫码
                 uni.scanCode({
                     onlyFromCamera: true,
                     success: function(res) {
                         that.result2 = res.result;
                         console.log('条码类型：' + res.scanType);
                         console.log('条码内容：' + res.result);
                     }
                 });
             },
             scan3() {
                 let that = this;
                 // 调起条码扫描
                 uni.scanCode({
                     scanType: 'barCode',
                     success: function (res) {
                         that.result3 = res.result;
                         console.log('条码类型：' + res.scanType);
                         console.log('条码内容：' + res.result);
                     }
                 });
             }