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要在Angular應(yīng)用中實(shí)現(xiàn)動態(tài)主題切換并保持用戶偏好設(shè)置,可以按照以下步驟操作:
import { Injectable } from '@angular/core';
@Injectable({
providedIn: 'root'
})
export class ThemeService {
private currentTheme: string = 'default';
themes = [
{ name: 'default', primaryColor: '#2196F3', accentColor: '#FF4081' },
{ name: 'dark', primaryColor: '#333', accentColor: '#FFA500' }
];
getCurrentTheme() {
return this.themes.find(theme => theme.name === this.currentTheme);
}
setTheme(themeName: string) {
this.currentTheme = themeName;
// Save user preference in local storage
localStorage.setItem('theme', themeName);
}
}
import { Component } from '@angular/core';
import { ThemeService } from './theme.service';
@Component({
selector: 'app-root',
templateUrl: './app.component.html',
styleUrls: ['./app.component.css']
})
export class AppComponent {
constructor(private themeService: ThemeService) {
const themeName = localStorage.getItem('theme');
if (themeName) {
this.themeService.setTheme(themeName);
}
}
get currentTheme() {
return this.themeService.getCurrentTheme();
}
setTheme(themeName: string) {
this.themeService.setTheme(themeName);
}
}
<div [ngStyle]="{ 'background-color': currentTheme.primaryColor, 'color': currentTheme.accentColor }">
<!-- Your app content here -->
</div>
<button (click)="setTheme('default')">Default Theme</button>
<button (click)="setTheme('dark')">Dark Theme</button>
通過以上步驟,在Angular應(yīng)用中就可以實(shí)現(xiàn)動態(tài)主題切換并保持用戶偏好設(shè)置。用戶在切換主題時,應(yīng)用會根據(jù)用戶的設(shè)置動態(tài)改變主題顏色。同時,用戶的偏好設(shè)置會被保存在本地存儲中,下次打開應(yīng)用時會保持用戶之前選擇的主題。
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