ngx-translate：消息显示时间太长

Question

我们的解决方案中 ngx-translate/translateService 遇到了一些延迟问题。将它与某些 API 一起使用以显示 return 失败或成功消息时，有时需要很长时间才能显示消息。例如，在下面的示例中，在显示消息之前需要一些时间，让用户感觉 PIN 根本没有创建。有什么办法可以改善这种反应吗？

src/assets/i18n/pt.yaml

transaction:
createdCodeMsg: "Novo código gerado com sucesso:"

src/assets/i18n/en.yaml

transaction:
createdCodeMsg: "New PIN sucessfully created: "

src/app/tools/createPIN/create-pin.component.ts

import { TranslateService } from '@ngx-translate/core';
...
    constructor(
        private translateService: TranslateService,
        private myServices: MyServices,
        ) {
        // get messages not part of a template
        this.subscription.push(
            this.translateService.stream([
                  'transaction.createdCodeMsg',
            ]).subscribe(values => {
                this.createdCodeMsg = values['transaction.createdCodeMsg'];
            })
        );
    }
...
    this.subscription.push(
        this.myServices.createPIN(this.createData).subscribe(data => {
            this.createDataResult = data;
            const myPin = this.createDataResult.pin;
            this.createdCodeMsg = this.createdCodeMsg + ' ' + myPin;
            this.msgs.push( { severity: 'success', summary: this.createdCodeMsg } );
        })
    );

当前版本：

$ npm -v 5.8.0

Angular CLI: 1.7.4 Node: 8.4.0 OS: win32 x64 Angular: 5.2.4 ... animations, cdk, common, compiler, compiler-cli, core, forms ... http, platform-browser, platform-browser-dynamic, router

@angular/cli: 1.7.4 @angular/flex-layout: 5.0.0-beta.14 @angular-devkit/build-optimizer: 0.3.2 @angular-devkit/core: 0.3.2 @angular-devkit/schematics: 0.3.2 @ngtools/json-schema: 1.2.0 @ngtools/webpack: 1.10.2 @schematics/angular: 0.3.2 @schematics/package-update: 0.3.2 typescript: 2.4.2 webpack: 3.11.0

Answer 1

我意识到问题是 angular 首先呈现 HTML。所以我用一个简单的渲染变量解决了这个问题，只要消息还没有准备好，它就不会被启用。同时应显示加载图标，以向用户反馈工作仍在进行中。

html:

<ng-container *ngIf="renderHTML; else elseTemplate">
   <myTemplate></myTemplate>
</ng-container>
<ng-template #elseTemplate>
  <div class="ui-table-loading ui-widget-overlay"></div>
  <div class="ui-table-loading-content">
    <i [class]="'fa fa-spin fa-2x ' + loadingIcon"></i>
  </div>
</ng-template>

component.ts:

...
renderHTML = false;
constructor(
        private translateService: TranslateService,
...
this.subscription.push(
        this.myServices.createPIN(this.createData).subscribe(data => {
            this.createDataResult = data;
            const myPin = this.createDataResult.pin;
            this.createdCodeMsg = this.createdCodeMsg + ' ' + myPin;
            this.msgs.push( { severity: 'success', summary: this.createdCodeMsg } );
            this.renderHTML = true;
        })
    );

ngx-translate：消息显示时间太长

ngx-translate: messages take too long to be displayed

ngx-translate

angular