问题描述
我有自定义的全局错误处理程序
I have custom global error handler
@Injectable()
export class GlobalErrorHandler implements ErrorHandler {
constructor(private injector: Injector) {
}
handleError(err: any): void {
var route = this.injector.get(Router);
var snackBar = this.injector.get(MatSnackBar);
console.log(err);
if (err instanceof HttpErrorResponse) {
var message = ErrorMessages.get(err.status);
if (route.url.toLowerCase() !== '/login' && err.status === 401) {
route.navigateByUrl('/login');
}
if (message.length > 0) {
snackBar.open(message, "x", { duration: 5000, horizontalPosition: "center", verticalPosition: "bottom" });
}
}
}
}
snackbar 的位置不是在垂直底部和水平居中.
The position of snackbar is not at vertically bottom and horizontally centered.
如果我在http拦截器中使用snackbar,它显示正确
If I use snackbar in http interceptor, it is displayed correctly
@Injectable()
export class AuthHttpInterceptor implements HttpInterceptor {
constructor(private loginService: LoginService, private route: Router, private snackBar: MatSnackBar) {
}
intercept(req: HttpRequest<any>, next: HttpHandler): Observable<HttpSentEvent | HttpHeaderResponse | HttpProgressEvent | HttpResponse<any> | HttpUserEvent<any>> {
var url = this.route.url;
var isAuthenticated = this.loginService.isAuthenticated();
var authHeader = ``;
if (isAuthenticated) {
authHeader = `Bearer ${this.loginService.getToken()}`;
}
req = req.clone({
setHeaders: {
Authorization: authHeader,
ApiKey: "aaa"
}
});
return next.handle(req)
.do((ev: HttpEvent<any>) => {
if (ev instanceof HttpResponse) {
}
}, (err: any) => {
if (err instanceof HttpErrorResponse) {
var message = ErrorMessages.get(err.status);
if (this.route.url.toLowerCase() !== '/login' && err.status === 401) {
this.route.navigateByUrl('/login');
}
if (message.length > 0) {
this.snackBar.open(message, "x", { duration: 5000, horizontalPosition: "center", verticalPosition: "bottom" });
}
}
});
}
}
为什么?
推荐答案
我也有这个问题但是没有使用 HTTPInterceptor(或任何其他拦截器).
I had this problem too but was not using HTTPInterceptor (or any other interceptors).
然而,我正在使用 SnackBar 创建和分发带有自定义组件的 code>openFromComponent - 这是出现问题的时间(以前,我使用的是 open
).
I was however creating and dispatching the SnackBar with a custom component using openFromComponent
- this is when the problem occurred (previously, I was using open
).
在一个区域内运行解决了我的问题.
您需要更新组件构造函数以包含 NgZone 和 MatSnackBar 服务:
You'll need to update the component constructor to include NgZone and MatSnackBar services:
constructor(
private readonly msb: MatSnackBar,
private readonly zone: NgZone
) { }
...然后启动:
private openErrorSnackBar(messages: string[]) {
this.zone.run(() => {
this.msb.openFromComponent(ErrorSnackComponent, {
data: messages,
horizontalPosition: 'end',
duration: 5000,
});
});
}
我将我的代码包装在一个方便的函数中,该函数接受字符串数组(错误消息)以显示在 Snackbar 组件中,
I've wrapped my code in a convenience function which accepts an array of strings (error messages) to display within the Snackbar Component,
这篇关于在角度 5 和材料中使用 errorhandler 时,Snackbar 位置错误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!