快速入门: Ionic Angular
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构建应用程序
让我们开始从头开始构建Angular应用程序。
初始化一个Ionic Angular应用程序
我们可以使用Ionic CLI来初始化
一个名为supabase-ionic-angular
的应用程序。
npm install -g @ionic/cli
ionic start supabase-ionic-angular blank --type angular
cd supabase-ionic-angular
然后让我们安装唯一的额外依赖:supabase-js
npm install @supabase/supabase-js
最后我们要在environment.ts
文件中保存环境变量。
我们所需要的是API URL和你[早些时候]复制的anon
密钥(#get-theapi-keys)。
这些变量将暴露在浏览器上,这完全没有问题,因为我们在数据库上启用了行级安全。
export const environment = {
production: false,
supabaseUrl: 'YOUR_SUPABASE_URL',
supabaseKey: 'YOUR_SUPABASE_KEY',
}
现在我们有了API凭证,让我们用ionic g s supabase
创建一个SupabaseService,以初始化Supabase客户端,并实现与Supabase API通信的功能。
import { Injectable } from '@angular/core'
import { LoadingController, ToastController } from '@ionic/angular'
import { AuthChangeEvent, createClient, Session, SupabaseClient } from '@supabase/supabase-js'
import { environment } from '../environments/environment'
export interface Profile {
username: string
website: string
avatar_url: string
}
@Injectable({
providedIn: 'root',
})
export class SupabaseService {
private supabase: SupabaseClient
constructor(private loadingCtrl: LoadingController, private toastCtrl: ToastController) {
this.supabase = createClient(environment.supabaseUrl, environment.supabaseKey)
}
get user() {
return this.supabase.auth.user()
}
get session() {
return this.supabase.auth.session()
}
get profile() {
return this.supabase
.from('profiles')
.select(`username, website, avatar_url`)
.eq('id', this.user?.id)
.single()
}
authChanges(callback: (event: AuthChangeEvent, session: Session | null) => void) {
return this.supabase.auth.onAuthStateChange(callback)
}
signIn(email: string) {
return this.supabase.auth.signIn({ email })
}
signOut() {
return this.supabase.auth.signOut()
}
updateProfile(profile: Profile) {
const update = {
...profile,
id: this.user?.id,
updated_at: new Date(),
}
return this.supabase.from('profiles').upsert(update, {
returning: 'minimal', // Don't return the value after inserting
})
}
downLoadImage(path: string) {
return this.supabase.storage.from('avatars').download(path)
}
uploadAvatar(filePath: string, file: File) {
return this.supabase.storage.from('avatars').upload(filePath, file)
}
async createNotice(message: string) {
const toast = await this.toastCtrl.create({ message, duration: 5000 })
await toast.present()
}
createLoader() {
return this.loadingCtrl.create()
}
}
设置一个登录路由
让我们建立一个路由来管理登录和注册。我们将使用Magic Links,所以用户可以用他们的电子邮件登录,而不需要使用密码。
用ionic g page login
Ionic CLI命令创建一个LoginPage。
本指南将显示模板的内联,但示例应用程序将有templateUrls
import { Component, OnInit } from '@angular/core'
import { SupabaseService } from '../supabase.service'
@Component({
selector: 'app-login',
template: `
<ion-header>
<ion-toolbar>
<ion-title>Login</ion-title>
</ion-toolbar>
</ion-header>
<ion-content>
<div class="ion-padding">
<h1>Supabase + Ionic Angular</h1>
<p>Sign in via magic link with your email below</p>
</div>
<ion-list inset="true">
<form (ngSubmit)="handleLogin($event)">
<ion-item>
<ion-label position="stacked">Email</ion-label>
<ion-input [(ngModel)]="email" name="email" autocomplete type="email"></ion-input>
</ion-item>
<div class="ion-text-center">
<ion-button type="submit" fill="clear">Login</ion-button>
</div>
</form>
</ion-list>
</ion-content>
`,
styleUrls: ['./login.page.scss'],
})
export class LoginPage implements OnInit {
email = ''
constructor(private readonly supabase: SupabaseService) {}
ngOnInit() {}
async handleLogin(event: any) {
event.preventDefault()
const loader = await this.supabase.createLoader()
await loader.present()
try {
await this.supabase.signIn(this.email)
await loader.dismiss()
await this.supabase.createNotice('Check your email for the login link!')
} catch (error) {
await loader.dismiss()
await this.supabase.createNotice(error.error_description || error.message)
}
}
}
账号页面
在用户登录后,我们可以让他们编辑他们的个人资料细节和管理他们的账户。
用ionic g page account
Ionic CLI命令创建一个AccountComponent。
import { Component, OnInit } from '@angular/core'
import { Router } from '@angular/router'
import { Profile, SupabaseService } from '../supabase.service'
@Component({
selector: 'app-account',
template: `
<ion-header>
<ion-toolbar>
<ion-title>Account</ion-title>
</ion-toolbar>
</ion-header>
<ion-content>
<form>
<ion-item>
<ion-label position="stacked">Email</ion-label>
<ion-input type="email" [value]="session?.user?.email"></ion-input>
</ion-item>
<ion-item>
<ion-label position="stacked">Name</ion-label>
<ion-input type="text" name="username" [(ngModel)]="profile.username"></ion-input>
</ion-item>
<ion-item>
<ion-label position="stacked">Website</ion-label>
<ion-input type="url" name="website" [(ngModel)]="profile.website"></ion-input>
</ion-item>
<div class="ion-text-center">
<ion-button fill="clear" (click)="updateProfile()">Update Profile</ion-button>
</div>
</form>
<div class="ion-text-center">
<ion-button fill="clear" (click)="signOut()">Log Out</ion-button>
</div>
</ion-content>
`,
styleUrls: ['./account.page.scss'],
})
export class AccountPage implements OnInit {
profile: Profile = {
username: '',
avatar_url: '',
website: '',
}
session = this.supabase.session
constructor(private readonly supabase: SupabaseService, private router: Router) {}
ngOnInit() {
this.getProfile()
}
async getProfile() {
try {
let { data: profile, error, status } = await this.supabase.profile
if (error && status !== 406) {
throw error
}
if (profile) {
this.profile = profile
}
} catch (error) {
alert(error.message)
}
}
async updateProfile(avatar_url: string = '') {
const loader = await this.supabase.createLoader()
await loader.present()
try {
await this.supabase.updateProfile({ ...this.profile, avatar_url })
await loader.dismiss()
await this.supabase.createNotice('Profile updated!')
} catch (error) {
await this.supabase.createNotice(error.message)
}
}
async signOut() {
console.log('testing?')
await this.supabase.signOut()
this.router.navigate(['/'], { replaceUrl: true })
}
}
启动
现在我们已经有了所有的组件,让我们来更新AppComponent。
import { Component } from '@angular/core'
import { Router } from '@angular/router'
import { SupabaseService } from './supabase.service'
@Component({
selector: 'app-root',
template: `
<ion-app>
<ion-router-outlet></ion-router-outlet>
</ion-app>
`,
styleUrls: ['app.component.scss'],
})
export class AppComponent {
constructor(private supabase: SupabaseService, private router: Router) {
this.supabase.authChanges((_, session) => {
console.log(session)
if (session?.user) {
this.router.navigate(['/account'])
}
})
}
}
然后更新AppRoutingModule
import { NgModule } from '@angular/core'
import { PreloadAllModules, RouterModule, Routes } from '@angular/router'
const routes: Routes = [
{
path: '/',
loadChildren: () => import('./login/login.module').then((m) => m.LoginPageModule),
},
{
path: 'account',
loadChildren: () => import('./account/account.module').then((m) => m.AccountPageModule),
},
]
@NgModule({
imports: [
RouterModule.forRoot(routes, {
preloadingStrategy: PreloadAllModules,
}),
],
exports: [RouterModule],
})
export class AppRoutingModule {}
一旦完成,在终端窗口运行这个程序。
ionic serve
浏览器将自动打开,显示该应用程序。
个人资料照片
每个Supabase项目都配置了存储,用于管理照片和视频等大文件。
创建一个上传小部件
让我们为用户创建一个头像,以便他们可以上传个人资料照片。
首先安装两个包,以便与用户的相机互动。
npm install @ionic/pwa-elements @capacitor/camera
CapacitorJS是Ionic的一个跨平台原生运行时间,它使网络应用通过应用商店部署,并提供对原生deavice API的访问。
Ionic PWA元素是一个配套的软件包,它将对某些不提供用户界面的浏览器API进行聚填,并提供自定义的Ionic UI。
安装了这些包后,我们可以更新我们的main.ts
,以包括对Ionic PWA元素的额外引导调用。
import { enableProdMode } from '@angular/core'
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic'
import { AppModule } from './app/app.module'
import { environment } from './environments/environment'
import { defineCustomElements } from '@ionic/pwa-elements/loader'
defineCustomElements(window)
if (environment.production) {
enableProdMode()
}
platformBrowserDynamic()
.bootstrapModule(AppModule)
.catch((err) => console.log(err))
然后用这个Ionic CLI命令创建一个AvatarComponent。
ionic g component avatar --module=/src/app/account/account.module.ts --create-module
import { Component, EventEmitter, Input, OnInit, Output } from '@angular/core'
import { DomSanitizer, SafeResourceUrl } from '@angular/platform-browser'
import { SupabaseService } from '../supabase.service'
import { Camera, CameraResultType } from '@capacitor/camera'
@Component({
selector: 'app-avatar',
template: `
<div class="avatar_wrapper" (click)="uploadAvatar()">
<img *ngIf="_avatarUrl; else noAvatar" [src]="_avatarUrl" />
<ng-template #noAvatar>
<ion-icon name="person" class="no-avatar"></ion-icon>
</ng-template>
</div>
`,
style: [
`
:host {
display: block;
margin: auto;
min-height: 150px;
}
:host .avatar_wrapper {
margin: 16px auto 16px;
border-radius: 50%;
overflow: hidden;
height: 150px;
aspect-ratio: 1;
background: var(--ion-color-step-50);
border: thick solid var(--ion-color-step-200);
}
:host .avatar_wrapper:hover {
cursor: pointer;
}
:host .avatar_wrapper ion-icon.no-avatar {
width: 100%;
height: 115%;
}
:host img {
display: block;
object-fit: cover;
width: 100%;
height: 100%;
}
`,
],
})
export class AvatarComponent implements OnInit {
_avatarUrl: SafeResourceUrl | undefined
uploading = false
@Input()
set avatarUrl(url: string | undefined) {
if (url) {
this.downloadImage(url)
}
}
@Output() upload = new EventEmitter<string>()
constructor(private readonly supabase: SupabaseService, private readonly dom: DomSanitizer) {}
ngOnInit() {}
async downloadImage(path: string) {
try {
const { data } = await this.supabase.downLoadImage(path)
this._avatarUrl = this.dom.bypassSecurityTrustResourceUrl(URL.createObjectURL(data))
} catch (error) {
console.error('Error downloading image: ', error.message)
}
}
async uploadAvatar() {
const loader = await this.supabase.createLoader()
try {
const photo = await Camera.getPhoto({
resultType: CameraResultType.DataUrl,
})
const file = await fetch(photo.dataUrl)
.then((res) => res.blob())
.then((blob) => new File([blob], 'my-file', { type: `image/${photo.format}` }))
const fileName = `${Math.random()}-${new Date().getTime()}.${photo.format}`
await loader.present()
await this.supabase.uploadAvatar(fileName, file)
this.upload.emit(fileName)
} catch (error) {
this.supabase.createNotice(error.message)
} finally {
loader.dismiss()
}
}
}
添加新的小组件
然后我们可以在账户组件的html模板上面添加小部件。
template: `
<ion-header>
<ion-toolbar>
<ion-title>Account</ion-title>
</ion-toolbar>
</ion-header>
<ion-content>
<app-avatar
[avatarUrl]="this.profile?.avatar_url"
(upload)="updateProfile($event)"
></app-avatar>
<!-- input fields -->
`
下一步
在这个阶段,你已经有了一个功能完备的应用程序!
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