ionic3

问题 How it is possible to define a optional parameter in Ionic 3 PWA? My current @IonicPage decorator looks like: @IonicPage({ segment: "landing/:id" }) But the id param must be optional. If I do not pass the id , I receive this error: Uncaught (in promise): invalid views to insert How to do it? Thanks in advance! 回答1: There is no method yet.You need to send empty string when you don’t need it.That is the workaround for this now. this.navCtrl.push('landing', { 'id': '' }) 回答2: Since Ionic 4 with

问题 How it is possible to define a optional parameter in Ionic 3 PWA? My current @IonicPage decorator looks like: @IonicPage({ segment: "landing/:id" }) But the id param must be optional. If I do not pass the id , I receive this error: Uncaught (in promise): invalid views to insert How to do it? Thanks in advance! 回答1: There is no method yet.You need to send empty string when you don’t need it.That is the workaround for this now. this.navCtrl.push('landing', { 'id': '' }) 回答2: Since Ionic 4 with

问题 I want to put image on canvas. initially I used image as background. But whenever I convert canvas to image, background image is not getting copied. Hence I tried to draw image on canvas. I am choosing image from device image gallery. Storing the image url as string and passing to next component. I checked, able to get the value. Please see below code and let me know what I did wrong. 1. HTML <canvas no-bounce id="canvas" (touchstart)='handleStart($event)' (touchmove)='handleMove($event)'

问题 I want to put image on canvas. initially I used image as background. But whenever I convert canvas to image, background image is not getting copied. Hence I tried to draw image on canvas. I am choosing image from device image gallery. Storing the image url as string and passing to next component. I checked, able to get the value. Please see below code and let me know what I did wrong. 1. HTML <canvas no-bounce id="canvas" (touchstart)='handleStart($event)' (touchmove)='handleMove($event)'

问题 I am working with ionic 3 location-based work. I am not able to get current location of latitude and longitude here. I mentioned my usable code. It's working fine in browser level but not working in a mobile device. code $ ionic cordova plugin add cordova-plugin-geolocation --variable GEOLOCATION_USAGE_DESCRIPTION="To locate you" $ npm install --save @ionic-native/geolocation import { Geolocation } from '@ionic-native/geolocation'; constructor(private geolocation: Geolocation) {} this

问题 I am working with ionic 3 location-based work. I am not able to get current location of latitude and longitude here. I mentioned my usable code. It's working fine in browser level but not working in a mobile device. code $ ionic cordova plugin add cordova-plugin-geolocation --variable GEOLOCATION_USAGE_DESCRIPTION="To locate you" $ npm install --save @ionic-native/geolocation import { Geolocation } from '@ionic-native/geolocation'; constructor(private geolocation: Geolocation) {} this

问题 I have been searching for a long time and have tried a lot of approaches but nothing seems to be working. I have a video tag which I want to be played when I tap over it. I am working on Ionic 3 and angular. The code is shown below. Please help me out or direct me if I missed anything. HTML: <video id="edit-video-element" width="100%" [src]="videoPath" webkit-playsinline poster="{{thumbnailPath}}" controls autobuffer > </video> .ts file this.video = document.getElementsByTagName('video')[0];

问题 I am creating a mobile application using ionic 3. I need to know the logic to implement reset password functionality. till now, i am able to send an email with reset token to the user. I was thinking that id user clicks on the link in the email, if app is installed then it should open the application page dedicated for reset password. So i did a little research and found that it can be done using DeepLinking ( custom url to respond) like myApp://resetPassword/{token} Now the problem is in

问题 I don't very understand, when I create a simple page with Ionic 3 with the following command ionic g page contact , where exactly have I to link the files and the page? Only on src/app/app.module.ts with this line? import { ContactPage } from '../pages/contact/contact'; Why do I need to push it on providers and declarations then? I have to do this for all the page my app will have? And if I want create a link to this page, I have to import it too on the homepage's typescript file? Thanks 回答1:

问题 parent.html <ion-content class="project"> <ion-grid> <ion-row class="details"> <project [data]="data"></project>// this child componet </ion-row> </ion-grid> </ion-content> project.html (child) <input currencyMask type="tel" [ngModel]="data?.budget" [options]="{ prefix: '', thousands: ',', decimal: '' }" formControlName="budget" ngModelChange)="data.budget=$event;calculateContingency()" [id]="'yourInputId' + 0" (focus)="scrollTo(0)"/> project.ts import { Content } from 'ionic-angular'; export