Angular 和 Cordova 的混合应用程序：动态内容未在 IOS 中呈现
Hybrid app with Angular and Cordova: Dynamic content not rendered in IOS
我已按照本指南将 Angular 项目转换为混合应用程序：
https://medium.com/@christof.thalmann/convert-angular-project-to-android-apk-in-10-steps-c49e2fddd29
对于 Android 我没有 运行 解决很多问题，应用程序在该平台上按预期运行。
上IOS我运行陷入多重困境。首先，为了显示内容，我需要将 Angular LocationStrategy 更改为 HashLocation，如本 SO 主题中所述：
Why Angular Router 8 router ...
尽管我现在确实获取了要渲染的内容，但我仍然无法正确获取动态内容（即需要在渲染前调用 Web 服务器的内容）。
我的应用程序有一个经典的导航栏，可以从一个组件切换到另一个组件。如果我通过单击导航按钮激活一个组件，则静态内容会正常显示。但是，动态内容不存在。我可以通过查看源代码来验证这一点：持有动态内容是空的。如果我再次单击同一个导航按钮，则会添加动态内容。我在 iPhone 模拟器和真实设备上得到了相同的效果。
这是组件之一的html
<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>
.ts 文件：
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;
}
}
我的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>
还有我的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"
]
}
}
我怀疑是和Apple的WKWebView有关。因为这是我第一次真正在 Apple World 中开发某些东西，所以我感觉某些 Apple 安全功能正在阻止某些东西。
更新:
我做了 2 次额外检查：
为了检查是否有任何样式问题导致了问题，我删除了所有样式。但是，同样的问题。
为了在启动组件时检查动态数据是否真的从服务器获取，我添加了一个 console.log() 以在获取数据后打印数据。已正确获取，但屏幕未更新以显示数据。
更新 2：
从Angular9更新到Angular10也没有解决问题。
经过大量的反复试验和搜索，我找到了解决方案。
我在这里找到了提示：
https://github.com/angular/angular/issues/7381[1]
由于我还不完全理解的原因，应用程序似乎在对服务器的异步调用期间切换区域。因此 UI 更改机制未被触发，屏幕未更新。
通过将变量的更改包装到 NgZone.run()屏幕正确更新。
更新后的 .ts 文件
import { Component, OnInit, NgZone } from '@angular/core';
// ...
constructor(private service: SummaryService, private authService: AuthService, private zone: NgZone) { }
// ...
getMonthScore(): void {
this.service.getScore('month').subscribe(score => {
this.zone.run(() => {
this.monthScore = score;
this.createMonthGraph();
console.log('GOT MONTH SCORE');
console.log(score);
});
})
}
只有在使用 Cordova 构建 iOS 应用程序时才需要这样做。似乎没有必要构建 Android 应用程序或使用浏览器。
我已按照本指南将 Angular 项目转换为混合应用程序： https://medium.com/@christof.thalmann/convert-angular-project-to-android-apk-in-10-steps-c49e2fddd29
对于 Android 我没有 运行 解决很多问题，应用程序在该平台上按预期运行。
上IOS我运行陷入多重困境。首先，为了显示内容，我需要将 Angular LocationStrategy 更改为 HashLocation，如本 SO 主题中所述：
Why Angular Router 8 router ...
尽管我现在确实获取了要渲染的内容，但我仍然无法正确获取动态内容（即需要在渲染前调用 Web 服务器的内容）。
我的应用程序有一个经典的导航栏，可以从一个组件切换到另一个组件。如果我通过单击导航按钮激活一个组件，则静态内容会正常显示。但是，动态内容不存在。我可以通过查看源代码来验证这一点：持有动态内容是空的。如果我再次单击同一个导航按钮，则会添加动态内容。我在 iPhone 模拟器和真实设备上得到了相同的效果。
这是组件之一的html
<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>
.ts 文件：
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;
}
}
我的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>
还有我的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"
]
}
}
我怀疑是和Apple的WKWebView有关。因为这是我第一次真正在 Apple World 中开发某些东西，所以我感觉某些 Apple 安全功能正在阻止某些东西。
更新:
我做了 2 次额外检查：
为了检查是否有任何样式问题导致了问题，我删除了所有样式。但是，同样的问题。
为了在启动组件时检查动态数据是否真的从服务器获取，我添加了一个
console.log()以在获取数据后打印数据。已正确获取，但屏幕未更新以显示数据。
更新 2：
从Angular9更新到Angular10也没有解决问题。
经过大量的反复试验和搜索，我找到了解决方案。
我在这里找到了提示：
https://github.com/angular/angular/issues/7381[1]
由于我还不完全理解的原因，应用程序似乎在对服务器的异步调用期间切换区域。因此 UI 更改机制未被触发，屏幕未更新。
通过将变量的更改包装到 NgZone.run()屏幕正确更新。
更新后的 .ts 文件
import { Component, OnInit, NgZone } from '@angular/core';
// ...
constructor(private service: SummaryService, private authService: AuthService, private zone: NgZone) { }
// ...
getMonthScore(): void {
this.service.getScore('month').subscribe(score => {
this.zone.run(() => {
this.monthScore = score;
this.createMonthGraph();
console.log('GOT MONTH SCORE');
console.log(score);
});
})
}
只有在使用 Cordova 构建 iOS 应用程序时才需要这样做。似乎没有必要构建 Android 应用程序或使用浏览器。