微信小程序实现RFID技术手机nfc标签识别

原创

菜菜有点菜

发布于 2024-05-04 16:00:17

1480

发布于 2024-05-04 16:00:17

最近参加挑战杯在开发项目的时候遇到了一个小程序识别nfc的需求，经过翻阅官方文档。

最终实现了对nfc芯片的识别。

实现代码如下：

read() {
				var that = this;
				const adapter = wx.getNFCAdapter();
				uni.showToast({
					'icon': 'success',
					'title': '监听成功'
				})
				adapter.onDiscovered(res => {
					let tagId = res.id;
					if (res.techs.includes(adapter.tech.nfcA)) {
						const uid = that.get(res);
						that.handle(uid);
					} else {
						wx.showToast({
							title: '卡片类型有误！',
							icon: 'error'
						});
					}


				})
				adapter.startDiscovery({
					success: function(res) {
						console.log('startDiscovery:', res);
					},
					fail(err) {
						console.log('failed to discover:', err)
						if (!err.errCode) {
							wx.showToast({
								title: '请检查NFC功能是否正常!',
								icon: 'none'
							})
							return
						}

						switch (err.errCode) {
							case 13000:
								wx.showToast({
									title: '设备不支持NFC!',
									icon: 'none'
								})
								break;
							case 13001:
								wx.showToast({
									title: '系统NFC开关未打开!',
									icon: 'none'
								})
								break;
							case 13019:
								wx.showToast({
									title: '用户未授权!',
									icon: 'none'
								})
								break;
							case 13010:
								wx.showToast({
									title: '未知错误!',
									icon: 'none'
								})
								break;
						}

					}

				})

			},
			get(res) {
				const byteArray = new Uint8Array(res.id);
				let uid = '';
				for (let i = 0; i < byteArray.length; i++) {
					let hex = byteArray[i].toString(16).toUpperCase();
					if (hex.length === 1) {
						hex = '0' + hex;
					}
					uid += hex;
				}
				return uid;
			},
			handle(uid) {
				uni.showModal({
					title: '呼应上了',
					content: '智囊编号：' + uid,
					confirmText: '打开',
					cancelColor: '关闭',
					success(res) {
						if (res.confirm) {
							uni.navigateTo({
								url: '../image/image?uid=' + uid // 跳转到目标页面，并携带 UID 参数
							});
						} else {
							console.log('quxiao');
						}
					}
				});
			}