ionic3

问题 I've inherited a database that stores an array of strings in the following format: {"First","Second","Third","Fourth"} This is output as an ordered list in the application. We're replacing the front-end mobile app at the moment (ionic / angular) and want to do an ngFor over this array. In the first iteration, we did a quick and dirty replace on the curly brackets and then split the string on "," but would like to use a better method. What is the best method for treating this type of string as

问题 I am using ion-select-multiple . It works perfectly fine normally. I have a requirement to pre select few options in it. I searched the web and found the solution, but after pre assigning the values, now when I try to change, it gives me error. Here is my home.html code: <ion-select multiple="true" okText="Okay" cancelText="Dismiss" [(ngModel)]="followers" [value]="{$value: followers}"> <ion-select-option value="brown">Brown</ion-select-option> <ion-select-option value="blonde">Blonde</ion

问题 I'm using gtag.js to track analytics on my Ionic application. This works with iOS, but not with Android. In index.html, I've add the script : <script> window.dataLayer = window.dataLayer || []; function gtag() { dataLayer.push(arguments); } gtag('js', new Date()); gtag('config', 'UA-XXXXXXXX-XX', { 'send_page_view': false, 'app_name': 'MyApp' }); </script> I've made a provider for analytics : import { HttpClient } from "@angular/common/http"; import { Injectable } from "@angular/core"; import

问题 I'm building a quiz app. My idea is to show 1 question per page. How do I subscribe and get an object inside a list using Observable. Instead of using *ngFor which display all of my objects. Is there a way to access the object one by one inside the subscribe block. export class ExerciseFlashcardPage { questions: Observable < any > ; type: string; constructor( public navCtrl: NavController, public navParams: NavParams, public afd: AngularFireDatabase ) { this.type = this.navParams.get('data');

问题 I'm trying to adapt some code I've created for a session timeout. Whenever a user interacts with the function, I want to reset the timer to start counting down again. I'm having difficulty working out how to inject similar code to this example C# code - I'm trying to integrate: var update = new Subject<bool>(); var res = update .Select(x => Observable.Interval(TimeSpan.FromSeconds(10.0))) .Switch(); res .Subscribe(_ => Console.WriteLine("Status sent.")); update.OnNext(true); res .Subscribe(_

问题 I'm trying to adapt some code I've created for a session timeout. Whenever a user interacts with the function, I want to reset the timer to start counting down again. I'm having difficulty working out how to inject similar code to this example C# code - I'm trying to integrate: var update = new Subject<bool>(); var res = update .Select(x => Observable.Interval(TimeSpan.FromSeconds(10.0))) .Switch(); res .Subscribe(_ => Console.WriteLine("Status sent.")); update.OnNext(true); res .Subscribe(_

问题 Not able to get the right image url when I select the images from the android device, I am able to get the temp image url from the cache where there is no original imaged copied to it. The Url which I got from the plugin looks like this. "file:///data/user/0/com.myapp.dev/cache/tmp_20180118_125700267959888.jpg" Is there any way to get the original image path or the temp url itself where the duplicate image is present in it? Plugin URL : https://github.com/wymsee/cordova-imagePicker.git Plugin

问题 Not able to get the right image url when I select the images from the android device, I am able to get the temp image url from the cache where there is no original imaged copied to it. The Url which I got from the plugin looks like this. "file:///data/user/0/com.myapp.dev/cache/tmp_20180118_125700267959888.jpg" Is there any way to get the original image path or the temp url itself where the duplicate image is present in it? Plugin URL : https://github.com/wymsee/cordova-imagePicker.git Plugin

问题 I am creating an android application using ionic 3, when i attempt to upload to playstore i get an error that my app targets api 25, when i check my project.property the value of target =android-26, same with my androidManifest.xml the value of targetSdkVersion = 26, how do i set the target again. Below is my ionic info Ionic: ionic (Ionic CLI) : 4.4.0 (C:\Users\IETECH\AppData\Roaming\npm\node_modules\ionic) Ionic Framework : ionic-angular 3.9.2 @ionic/app-scripts : 3.1.8 Cordova: cordova

问题 I am creating an android application using ionic 3, when i attempt to upload to playstore i get an error that my app targets api 25, when i check my project.property the value of target =android-26, same with my androidManifest.xml the value of targetSdkVersion = 26, how do i set the target again. Below is my ionic info Ionic: ionic (Ionic CLI) : 4.4.0 (C:\Users\IETECH\AppData\Roaming\npm\node_modules\ionic) Ionic Framework : ionic-angular 3.9.2 @ionic/app-scripts : 3.1.8 Cordova: cordova