我正在尝试进行 chrome 蓝牙 API 调用,但我没有通过打字稿获得成功。我已经尝试在 html() 中应用文件但也无济于事。但是,如果您复制代码并将其粘贴到浏览器控制台中,代码将完美运行:(
控制台错误(如果在 Ts 中运行代码):
DOMException: Must be handling a user gesture to show a permission request.
// 打字稿/TS:
requestBluetooth() {
(window.navigator as any).bluetooth.requestDevice({ filters: [{ services: [this.PRINT_SERVICE_CODE] }] })
.then(device => {
return device.gatt.connect();
})
.then(server => {
return server.getPrimaryService(this.PRINT_SERVICE_CODE);
})
.then(service => {
return service.getCharacteristic('00002af1-0000-1000-8000-00805f9b34fb');
})
.then((characteristic) => {
this.sendTextData(characteristic);
})
.catch(error => console.log(error));
}
sendTextData(characteristic) {
// Get the bytes for the text
const encoder = new TextEncoder('UTF-8');
const text = encoder.encode('TESTETSETS' + '\u000A\u000D');
return characteristic.writeValue(text)
.then(() => console.log('Write done.'));
}
// 在控制台浏览器中工作:
const PRINT_SERVICE_CODE = '000018f0-0000-1000-8000-00805f9b34fb';
const sendTextData = (function (characteristic) {
const encoder = new TextEncoder('UTF-8');
const text = encoder.encode('TESTETSETS' + '\u000A\u000D');
return characteristic.writeValue(text)
.then(() => console.log('Write done.'));
})
const request = (function () {
navigator.bluetooth.requestDevice({ filters: [{ services: [PRINT_SERVICE_CODE] }] })
.then(device => {
return device.gatt.connect();
})
.then(server => {
return server.getPrimaryService(PRINT_SERVICE_CODE);
})
.then(service => {
return service.getCharacteristic('00002af1-0000-1000-8000-00805f9b34fb');
})
.then((characteristic) => {
this.sendTextData(characteristic);
})
.catch(error => console.log(error));
})
request();
// 项目信息:
角 CLI:6.0.8
节点:8.11.3
操作系统:linux x64
角度:6.0.9