首先通过wx.getNFCAdapter()来获取nfc实例
然后调用startDiscovery获取当前手机nfc状态
已经打开了nfc的就可以调用监听方法onDiscovered
监听到数据后setData把数据展示出来就ok了，方法如下
nfcRead() {
console.log('nfc')
const nfc = wx.getNFCAdapter()
this.nfc = nfc
let _this = this
function discoverHandler(res) {
console.log('discoverHandler', res)
const data = new Uint8Array(res.id)
let str = ""
data.forEach(e => {
let item = e.toString(16)
if (item.length == 1) {
item = '0' + item
}
item = item.toUpperCase()
console.log(item)
str += item
})
_this.setData({
newCardCode: str
})
console.log(str)
wx.showToast({
title: '读取成功！',
icon: 'none'
})
}
nfc.startDiscovery({
success(res) {
console.log(res)
wx.showToast({
title: 'NFC读取功能已开启！',
icon: 'none'
})
nfc.onDiscovered(discoverHandler)
},
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;
}
}
})
},
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