uniapp 调用实现扫一扫功能``` scanCode() { const _this = this; // 允许从相

<view class="" style="padding: 20rpx">
			<u-button type="success" text="扫一扫" @click="scanCode()"></u-button>
		</view>
scanCode() {
			const _this = this;
			// 允许从相机和相册扫码
			uni.scanCode({
				success: function (res) {
					_this.result = res.result;
					console.log('条码类型：' + res.scanType);
					console.log('条码内容：' + res.result);
				}
			});
		},