I have converted an Angular project into a hybrid app following this guide: https://medium.com/@christof.thalmann/convert-angular-project-to-android-apk-in-10-steps-c49e2fddd29
For Android I did not run into many issues and the app is working as expected on that platform.
On IOS I ran into multiple difficulties. First of all in order contents display I needed to change the Angular LocationStrategy to HashLocation as describe in this SO topic:
Why Angular Router 8 router ...
Although I now do get content to render I still have trouble getting the dynamic content (i.e. the content requiring a call to a web server before rendering) to render properly.
My app has got a classic NavBar to switch from one component to another. If I activate one component by clicking on a Nav Button the static content gets rendered ok. However, the dynamic content is not there. I can verify this by looking at the source code: The holding the dynamic content is empty. If I click on the same Nav Button again the dynamic content is added. I get the same effect on an iPhone simulator and on a real device.
This is the html of one of the components
<div class="card bg-opaque border-light">
<div class="card-body">
<div>
<h2 class="text-light text-opaque">Einsparungen von {{ user }}</h2>
</div>
<div *ngIf="monthScore" class="card border-primary bg-opaque-light"> <!-- THIS BLOCK NOT VISIBLE -->
<div class="card-body text-center">
<h3 class="card-title">Current Month</h3>
<ul class="list-unstyled">
<li>
<strong>Savings:</strong> {{ monthScore.savings | number: '1.1-2' }} kg
</li>
<li>
<strong>Position:</strong> {{ monthScore.rank }}
<span *ngIf="!monthScore.rank">???</span>
<span *ngIf="monthScore.rank == 1">
<mat-icon class="text-warning">emoji_events</mat-icon>
</span>
</li>
<li>
<strong>Captured:</strong> {{ monthScore.captured | number: '1.1-2' }} kg
</li>
</ul>
<div *ngIf="showMonthButton" >
<button class="btn btn-outline-primary" (click)="toggleMonthGraph()">
<mat-icon>bar_chart</mat-icon>
</button>
</div>
<div *ngIf="!showMonthButton" (click)="toggleMonthGraph()">
<canvas
baseChart
[chartType]="'bar'"
[datasets]="monthChartData"
[labels]="monthChartLabels"
[options]="chartOptions"
[legend]="false">
</canvas>
</div>
</div>
</div>
<div *ngIf="yearScore" class="card border-primary bg-opaque-light"> <!-- THIS BLOCK NOT VISIBLE --> <div class="card-body text-center">
<h3 class="card-title">Current year</h3>
<ul class="list-unstyled">
<li>
<strong>Savings:</strong> {{ yearScore.savings | number: '1.1-2' }} kg
</li>
<li>
<strong>Position:</strong> {{ yearScore.rank }}
<span *ngIf="!yearScore.rank">???</span>
<span *ngIf="yearScore.rank == 1">
<mat-icon class="text-warning">emoji_events</mat-icon>
</span>
</li>
<li>
<strong>Captured:</strong> {{ yearScore.captured | number: '1.1-2' }} kg
</li>
</ul>
<div *ngIf="showYearButton" >
<button class="btn btn-outline-primary" (click)="toggleYearGraph()">
<mat-icon>bar_chart</mat-icon>
</button>
</div>
<div *ngIf="!showYearButton" (click)="toggleYearGraph()">
<canvas
baseChart
[chartType]="'bar'"
[datasets]="yearChartData"
[labels]="yearChartLabels"
[options]="chartOptions"
[legend]="false">
</canvas>
</div>
</div>
</div>
</div>
</div>
<app-inpage></app-inpage>
The .ts file:
import { Component, OnInit } from '@angular/core';
import { SummaryService} from '../summary.service';
import { AuthService } from '../../auth/auth.service';
import { Score } from '../summary';
import { MAT_RIPPLE_GLOBAL_OPTIONS } from '@angular/material/core';
@Component({
selector: 'app-score',
templateUrl: './score.component.html',
styleUrls: ['./score.component.scss']
})
export class ScoreComponent implements OnInit {
monthScore: Score;
yearScore: Score;
user: string;
// Histogramm per Consumer
chartOptions = {
responsive: true,
scales: {
xAxes: [{
gridLines: {
drawOnChartArea: false
}
}],
yAxes: [{
gridLines: {
drawOnChartArea: false
}
}]
}
};
yearChartData = [];
yearChartLabels = [];
yearChartTitle: string;
showYearChart: boolean = false;
showYearButton: boolean = true;
monthChartData = [];
monthChartLabels = [];
monthChartTitle: string;
showMonthChart: boolean = false;
showMonthButton: boolean = true;
constructor(private service: SummaryService, private authService: AuthService) { }
ngOnInit(): void {
this.user = this.authService.user
this.getMonthScore();
this.getYearScore();
}
getMonthScore(): void {
this.service.getScore('month').subscribe(score => {
this.monthScore = score;
this.createMonthGraph();
})
}
getYearScore(): void {
console.log('GETTING SCORE')
this.service.getScore('year').subscribe(score => {
this.yearScore = score;
this.createYearGraph();
})
}
private createYearGraph(): void {
this.service.getTimeline('year').subscribe(timelines => {
let data: number[] = [];
let label: string[] = [];
for (let i = 0; i < timelines.length; i++){
data.push(timelines[i].user_savings);
label.push(timelines[i].period.toString());
}
this.yearChartData = [{data: data, label: 'Savings', barThickness: 2, backgroundColor: 'rgba(0, 0, 0, 0.5' }]
this.yearChartLabels = label
})
}
private createMonthGraph(): void {
this.service.getTimeline('month').subscribe(timelines => {
let data: number[] = [];
let label: string[] = [];
for (let i = 0; i < timelines.length; i++){
data.push(timelines[i].user_savings);
label.push(timelines[i].period.toString());
}
this.monthChartData = [{data: data, label: 'Savings', barThickness: 2, backgroundColor: 'rgba(0, 0, 0, 0.5' }]
this.monthChartLabels = label
})
}
toggleYearGraph(): void {
this.showYearChart = !this.showYearChart;
this.showYearButton = !this.showYearButton;
}
toggleMonthGraph(): void {
this.showMonthButton = !this.showMonthButton;
}
}
My config.xml
<?xml version='1.0' encoding='utf-8'?>
<widget id="com.ticumwelt.co2" version="0.2.1" xmlns="http://www.w3.org/ns/widgets" xmlns:cdv="http://cordova.apache.org/ns/1.0">
<name>Tracker</name>
<description>
An app to track your savings.
</description>
<author email="mymail@example.com" href="https://example.com">
Developer Team
</author>
<content src="index.html" />
<access origin="*" />
<allow-intent href="http://*/*" />
<allow-intent href="https://*/*" />
<allow-intent href="tel:*" />
<allow-intent href="sms:*" />
<allow-intent href="mailto:*" />
<allow-intent href="geo:*" />
<platform name="android">
<allow-intent href="market:*" />
</platform>
<platform name="ios">
<allow-intent href="itms:*" />
<allow-intent href="itms-apps:*" />
<!-- iOS 8.0+ -->
<!-- iPhone 6 Plus -->
<icon src="res/ios/icons/icon-60@3x.png" width="180" height="180" />
<!-- iOS 7.0+ -->
<!-- iPhone / iPod Touch -->
<icon src="res/ios/icons/icon-60.png" width="60" height="60" />
<icon src="res/ios/icons/icon-60@2x.png" width="120" height="120" />
<!-- iPad -->
<icon src="res/ios/icons/icon-76.png" width="76" height="76" />
<icon src="res/ios/icons/icon-76@2x.png" width="152" height="152" />
<!-- Spotlight Icon -->
<icon src="res/ios/icons/icon-40.png" width="40" height="40" />
<icon src="res/ios/icons/icon-40@2x.png" width="80" height="80" />
<!-- iOS 6.1 -->
<!-- iPhone / iPod Touch -->
<icon src="res/ios/icons/icon.png" width="57" height="57" />
<icon src="res/ios/icons/icon@2x.png" width="114" height="114" />
<!-- iPad -->
<icon src="res/ios/icons/icon-72.png" width="72" height="72" />
<icon src="res/ios/icons/icon-72@2x.png" width="144" height="144" />
<!-- iPad Pro -->
<icon src="res/ios/icons/icon-167.png" width="167" height="167" />
<!-- iPhone Spotlight and Settings Icon -->
<icon src="res/ios/icons/icon-small.png" width="29" height="29" />
<icon src="res/ios/icons/icon-small@2x.png" width="58" height="58" />
<icon src="res/ios/icons/icon-small@3x.png" width="87" height="87" />
<!-- iPad Spotlight and Settings Icon -->
<icon src="res/ios/icons/icon-50.png" width="50" height="50" />
<icon src="res/ios/icons/icon-50@2x.png" width="100" height="100" />
<!-- iPad Pro -->
<icon src="res/ios/icons/icon-83.5@2x.png" width="167" height="167" />
<splash src="res/ios/screen/default@2x~universal~anyany.png" />
<preference name="WKWebViewOnly" value="true" />
<feature name="CDVWKWebViewEngine">
<param name="ios-package" value="CDVWKWebViewEngine" />
</feature>
<preference name="CordovaWebViewEngine" value="CDVWKWebViewEngine" />
<preference name="WKSuspendInBackground" value="false" />
</platform>
<edit-config target="NSLocationWhenInUseUsageDescription" file="*-Info.plist" mode="merge">
<string>need location access to find things nearby</string>
</edit-config>
</widget>
And my package.json
{
"name": "com.example.tracker",
"displayName": "Tracker",
"version": "0.2.1",
"description": "An app to track your savings",
"main": "index.js",
"scripts": {
"ng": "ng",
"start": "ng serve",
"build": "ng build",
"test": "ng test",
"lint": "ng lint",
"e2e": "ng e2e"
},
"keywords": [
"ecosystem:cordova"
],
"author": "My Name",
"license": "Apache-2.0",
"private": true,
"dependencies": {
"@angular-material-components/datetime-picker": "^2.0.4",
"@angular/animations": "~9.0.3",
"@angular/cdk": "^9.2.4",
"@angular/common": "~9.0.3",
"@angular/compiler": "~9.0.3",
"@angular/core": "~9.0.3",
"@angular/forms": "~9.0.3",
"@angular/localize": "~9.0.3",
"@angular/material": "^9.2.4",
"@angular/platform-browser": "~9.0.3",
"@angular/platform-browser-dynamic": "~9.0.3",
"@angular/router": "~9.0.3",
"@ionic-native/background-geolocation": "^5.29.0",
"@ionic-native/core": "^5.29.0",
"@ionic/angular": "^5.4.1",
"@ng-bootstrap/ng-bootstrap": "^6.2.0",
"bootstrap": "^4.4.0",
"chart.js": "^2.9.4",
"cordova-plugin-splashscreen": "6.0.0",
"material-design-icons-iconfont": "^6.1.0",
"ng-connection-service": "^1.0.4",
"ng2-charts": "^2.4.2",
"ngx-cookie-service": "^10.1.1",
"rxjs": "~6.5.4",
"tslib": "^1.10.0",
"zone.js": "~0.10.2"
},
"devDependencies": {
"@angular-devkit/build-angular": "^0.1002.0",
"@angular/cli": "~9.0.4",
"@angular/compiler-cli": "~9.0.3",
"@angular/language-service": "~9.0.3",
"@globules-io/cordova-plugin-ios-xhr": "^1.2.0",
"@mauron85/cordova-plugin-background-geolocation": "^3.1.0",
"@types/jasmine": "~3.5.0",
"@types/jasminewd2": "~2.0.3",
"@types/node": "^12.11.1",
"codelyzer": "^5.1.2",
"cordova-ios": "^6.1.1",
"cordova-plugin-geolocation": "^4.1.0",
"cordova-plugin-whitelist": "^1.3.4",
"jasmine-core": "~3.5.0",
"jasmine-spec-reporter": "~4.2.1",
"karma": "~4.3.0",
"karma-chrome-launcher": "~3.1.0",
"karma-coverage-istanbul-reporter": "~2.1.0",
"karma-jasmine": "~2.0.1",
"karma-jasmine-html-reporter": "^1.4.2",
"protractor": "~5.4.3",
"ts-node": "~8.3.0",
"tslint": "~5.18.0",
"typescript": "~3.7.5"
},
"cordova": {
"plugins": {
"cordova-plugin-whitelist": {},
"cordova-plugin-geolocation": {
"GPS_REQUIRED": "true"
},
"cordova-plugin-background-geolocation": {
"ALWAYS_USAGE_DESCRIPTION": "This app always requires location tracking",
"MOTION_USAGE_DESCRIPTION": "This app requires motion detection"
},
"@globules-io/cordova-plugin-ios-xhr": {}
},
"platforms": [
"ios"
]
}
}
My suspicion is that it has something to do with the WKWebView of Apple. As it is the first time I am actually developing something in the Apple World I have the feeling that some Apple security feature is blocking something.
Update:
I did 2 additional checks:
In order to check if any styling stuff was causing the issue I removed all the stylings. However, same problem.
In order to check if the dynamic data is actually fetched from the server when initiating the component I added a
console.log()to print the data after it is fetched. It is fetched correctly but the screen does not update to display the data.
Update 2:
Updating from Angular 9 to Angular 10 also did not solve the problem.
