问题描述
在 google 中验证,使用 Angular2.
Auth in google, use Angular2.
首先,在 HTML 中,我加载 google api 库:
First, in HTML, I load google api library:
//index.html
//...
<script>
var googleApiClientReady = function() {
ng2Gauth.googleApiClientReady(gapi);
}
</script>
<script src="https://apis.google.com/js/client.js?onload=googleApiClientReady"></script>
//...
在 Angular2 服务之后,我处理 google auth 数据并发出事件以通知组件 google api 是否准备就绪:
After in Angular2 service I handle google auth data and emit event to inform component if google api is ready:
//google auth service .ts
import {Injectable, EventEmitter} from 'angular2/core';
@Injectable()
export class GoogleAuthService {
isGoogleApiReady: EventEmitter<boolean>;
constructor() {
window['ng2Gauth'] = this; //is it correct way?
this.isGoogleApiReady = new EventEmitter;
}
//it fires from outside of Angular scope
public googleApiClientReady(gapi){
this.gapi.auth.init( () => {
this.isGapiReady.emit(true);
})
};
//...
在这里,在组件中,我选中复选框,或禁用按钮,并执行其他模板操作.
Here, in the component, I check checkbox, or make buttons disabled, and do other template stuff.
//gauth component
import {Component} from 'angular2/core';
import {GauthService} from './gauth.service';
@Component({
selector: 'gauth',
template: `<input type="checkbox" [(ngModel)]="isReady"> Api ready
export class GauthComponent {
constructor (private _gauthService:GauthService) {
_gauthService.isGoogleApiReady.subscribe( (flag) => this.gapiOnReady(flag) )
public isReady = false
gapiOnReady(flag: boolean) { //it fires,
this.isReady = true; //but not affect on template correctly
console.log('gapi loaded')
this._gauthService.checkAuth();
}
}
看起来一切正常,但浏览器(Chrome,FF)中存在奇怪的错误 - 如果页面在活动浏览器的选项卡上加载 - 看起来没有任何反应 - 复选框没有检查,如果我在浏览器加载时及时打开其他选项卡页面,一切正常.
It looks like all should work but there is weird bug in browsers (Chrome, FF) - if page loads on active browser's tab - it looks like nothing happens - checkbox no checks, if I open other tabs in time when browser load page, all is ok.
如何解决?是 Angular 错误还是我做错了?
How to fix it? Is it Angular bug or I do it wrong way?
推荐答案
将 NgZone
注入到组件中,并用 zone.run()
初始化库代码,这样库代码使用区域补丁异步 API,Angular 知道何时需要运行变更检测
Inject NgZone
into a component and initialize the library code with zone.run()
, this way the library code uses zones patched async API and Angular knows when change detection runs are necessary
var googleApiClientReady;
constructor(private zone: NgZone) {
}
public googleApiClientReady(gapi){
zone.run(function () {
this.gapi.auth.init( () => {
this.isGapiReady.emit(true);
})
});
}
和
gapiOnReady(flag: boolean) {
zone.run(function() {
this.isReady = true; //but not affect on template correctly
console.log('gapi loaded')
this._gauthService.checkAuth();
});
}
这篇关于服务事件不会正确影响模板的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!