//和卡建立连接           mc.connect({             success: function(res) {               console.log("连接卡成功： " + JSON.stringify(res))               //验证密码A指令               var keyaBs = [0x60, 0x04, 0xAE, 0x38, 0x40, 0x39,  0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF];               //把字节数组转成ArrayBuffer               var keyaArray = new Uint8Array(keyaBs.map(function (bs) {                 return bs;               }));               var keyaBuffer = keyaArray.buffer;               //验证密码A               mc.transceive({                 data:keyaBuffer,                 success:function(res){                   console.error("验证密码A" + "成功" + res.errMsg);                   var arr = [0x30, 1]                   var arrayBuffer = new Int8Array(arr).buffer                   var u8 = new Uint8Array(arrayBuffer)                   for(var i = 0; i < u8.length; i ++) {                     console.log(u8[i])                   }                   //发送指令                   mc.transceive({                     data: arrayBuffer,                     success: function(res) {                       console.log("transceive返回: " + JSON.stringify(res))                     },                     fail: function(e) {                       console.log("transceive异常: " + JSON.stringify(e))                     }                   });                 },                 fail:function(res){                   console.error("验证密码A" + "失败" + res.errMsg);                 },                 complete:function(res){                   console.error("验证密码A" + "状态" + res.errMsg);                 }               });             },             fail: function(e) {               console.log("和卡连接异常: " + JSON.stringify(e))             }           }) 结果：transceive返回: {"errMsg":"transceive:ok","data":{}}

目标：手机nfc识别ic卡获取ic卡的信息； 问题：nfcA.transceive获取的结果ArrayBuffer解析成字符串乱码，用decodeURIComponent报错：url malformed 手机：华为p30，EMUI:11.0.0，安卓10 ps:使用名叫“nfc读写”的小程序识别卡片可以得到一个类似id的的信息，如AD2A04AF 代码如下： const app = getApp(); var NFCAdapter = wx.getNFCAdapter(); Page({ data: { id: "" }, onShow() { NFCAdapter.startDiscovery({ success: res => { this.init(); }, fail: error => { console.log(error) } }) }, str2ab(str) { var buf = new ArrayBuffer(str.length * 2); var bufView = new Uint16Array(buf); for (var i = 0, strLen = str.length; i < strLen; i++) { bufView[i] = str.charCodeAt(i); } return buf; }, init() { NFCAdapter.onDiscovered(callback => { if (callback.techs.includes(NFCAdapter.tech.nfcA)) { const nfcA = NFCAdapter.getNfcA(); app.nfcA = nfcA; nfcA.connect({ success: res => { nfcA.transceive({ data: this.str2ab('GET DATA'), success: res => { console.log(res.data) //打印结果 <ArrayBuffer:byteLength=16> let k = String.fromCharCode.apply(null, new Uint16Array(res.data)); console.log(k) // k为乱码 console.log(decodeURIComponent(escape(k))) // 这里报错：url malformed }, fail: error => { console.log(error) } }) } }) } }) }, })

system: "iOS 14.5.1" version: "8.0.7" SDKVersion: "2.17.3 model: "iPhone 12<iPhone13,2>" [图片]

【貌似官方修复了这个问题。现在可以了。】 https://developers.weixin.qq.com/miniprogram/dev/api/canvas/CanvasContext.drawImage.html drawImage( )不支持本地tmp路径的临时文件，谨慎使用，太坑了。 写法1. ``` path = 'tmp/wxf65e9ae5f68283d2.o6zAJs5h4IkyHaGS7_j6gUPGTR9c.arwyj04Eq2ok341457e272957e237fa21d743912f60b.jpg' ctx.drawImage(path, 0, 0, width, height, 0, 0, canvasWidth, canvasHeight) ``` 提示：Failed to execute 'drawImage' on 'CanvasRenderingContext2D': The provided value is not of type '(CSSImageValue or HTMLImageElement or SVGImageElement or HTMLVideoElement or HTMLCanvasElement or ImageBitmap or OffscreenCanvas)';at SelectorQuery callback function 写法2. ``` const img = canvas.createImage() img.src = path img.onload = () =>{     ctx.drawImage(img, 0, 0, width, height, 0, 0, canvasWidth, canvasHeight) } ``` 提示：tmp/wxf65e9ae5f68283d2.o6zAJs5h4IkyHaGS7_j6gUPGTR9c.arwyj04Eq2ok341457e272957e237fa21d743912f60b.jpg:1 GET http://tmp/wxf65e9ae5f68283d2.o6zAJs5h4IkyHaGS7_j6gUPGTR9c.arwyj04Eq2ok341457e272957e237fa21d743912f60b.jpg net::ERR_PROXY_CONNECTION_FAILED

1、在input中设置： text-align: right 在iOS中没有问题，在安卓中获取焦点时光标在提示文字左边，输入文字后正常；[图片] 2、在textarea中设置： text-align: right 安卓正常，iOS提示文字还是靠左显示； [图片]