[英]Ionic plugin BLE (and all others plugins) is not a function error | Ionic4 and Angular 7
我需要幫助。 所以我用 angular 項目創建了 ionic cordova 來制作一個應用程序。 我已經在 Android 設備上啟動了該應用程序並開始使用 Chrome DevTools 進行調試。
所以一切正常,但是,問題是:
我已經安裝了這個 BLE 離子插件:
https://ionicframework.com/docs/native/ble#installation
插入這個:
ionic cordova plugin add cordova-plugin-ble-central
npm install @ionic-native/ble
在 app.module.ts 上添加了這個
import { BLE } from '@ionic-native/ble/ngx';
@NgModule({
declarations: [
MyApp,
AboutPage,
ContactPage,
HomePage,
TabsPage
],
imports: [
BrowserModule,
IonicModule.forRoot(MyApp)
],
bootstrap: [IonicApp],
entryComponents: [
MyApp,
AboutPage,
ContactPage,
HomePage,
TabsPage
],
providers: [
StatusBar,
SplashScreen,
{provide: ErrorHandler, useClass: IonicErrorHandler},
BLE <------- Add this BLE on providers
]
})
所以這是我的家.ts
import { Component, OnInit } from '@angular/core';
import { NavController } from 'ionic-angular';
import { BLE } from '@ionic-native/ble/ngx';
@Component({
selector: 'page-home',
templateUrl: 'home.html'
})
export class HomePage implements OnInit{
constructor(
public navCtrl: NavController,
public ble: BLE
) {
}
ngOnInit() {
this.ble.startScan([]).subscribe(device => {
console.log(JSON.stringify(device));
debugger;
});
setTimeout(() => {
this.ble.stopScan();
}, 5000);
}
}
我已經通過終端啟動了這個:
離子科爾多瓦運行android -l
當應用程序啟動時,錯誤是:
錯誤錯誤:未捕獲(承諾):TypeError:Object(...) 不是函數 TypeError:Object(...) 不是 HomePage.webpackJsonp.251 處 BLE.startScan (vendor.js:81070) 的函數.HomePage.ngOnInit (main.js:178) at checkAndUpdateDirectiveInline (vendor.js:13047) at checkAndUpdateNodeInline (vendor.js:14571) at checkAndUpdateNode (vendor.js:14514) at debugCheckAndUpdateNode (vendor.js:15407) at debugCheckAndUpdateNode (vendor.js:15407) vendor.js:15348) at Object.eval [as updateDirectives] (ng:///AppModule/HomePage_Host.ngfactory.js:9) at Object.debugUpdateDirectives [as updateDirectives] (vendor.js:15333) at checkAndUpdateView (vendor. js:14480) 在 c (polyfills.js:3) 在 c (polyfills.js:3) 在 polyfills.js:3 在 t.invokeTask (polyfills.js:3) 在 Object.onInvokeTask (vendor.js:5387) at t.invokeTask (polyfills.js:3) at r.runTask (polyfills.js:3) at o (polyfills.js:3) defaultErrorLogger @ vendor.js:2085
我怎么了,或者我忘記了什么? 這個問題發生在我用過的每個插件上。
你必須在 startScan([],15) 中傳遞兩個參數
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