(Ionic v4 + ionic-tooltips) -> 无法绑定到“ngIf”，因为它不是“div”的已知 属性

Question

我正在尝试将 ionic-tooltips 模块与 Ionic v4 一起使用。该模块是使用 npm 安装的。

创建一个新的空白项目并按照模块站点的安装步骤进行操作时我遇到了一些问题。首先是一些缺失的组件，我可以通过更改某些文件的导入来手动修复这些组件，就像 question.

之后我得到了另一个错误：

ERROR Error: Uncaught (in promise): Error: Template parse errors:
Can't bind to 'ngIf' since it isn't a known property of 'div'. ("
    <div [ERROR ->]*ngIf="tooltipHtml; else txt" [innerHTML]="tooltipHtml"></div>
    <ng-template #txt>{{ text }}</ng-t"): ng:///TooltipsModule/TooltipBox.html@1:9
Can't bind to 'ngIfElse' since it isn't a known property of 'div'. ("
    <div [ERROR ->]*ngIf="tooltipHtml; else txt" [innerHTML]="tooltipHtml"></div>
    <ng-template #txt>{{ text }}</ng-t"): ng:///TooltipsModule/TooltipBox.html@1:9
Property binding ngIf not used by any directive on an embedded template. Make sure that the property name is spelled correctly and all directives are listed in the "@NgModule.declarations". ("
    [ERROR ->]<div *ngIf="tooltipHtml; else txt" [innerHTML]="tooltipHtml"></div>
    <ng-template #txt>{{ text }}<"): ng:///TooltipsModule/TooltipBox.html@1:4
Property binding ngIfElse not used by any directive on an embedded template. Make sure that the property name is spelled correctly and all directives are listed in the "@NgModule.declarations". ("
    [ERROR ->]<div *ngIf="tooltipHtml; else txt" [innerHTML]="tooltipHtml"></div>
    <ng-template #txt>{{ text }}<"): ng:///TooltipsModule/TooltipBox.html@1:4
Error: Template parse errors:
Can't bind to 'ngIf' since it isn't a known property of 'div'. ("
    <div [ERROR ->]*ngIf="tooltipHtml; else txt" [innerHTML]="tooltipHtml"></div>
    <ng-template #txt>{{ text }}</ng-t"): ng:///TooltipsModule/TooltipBox.html@1:9
Can't bind to 'ngIfElse' since it isn't a known property of 'div'. ("
    <div [ERROR ->]*ngIf="tooltipHtml; else txt" [innerHTML]="tooltipHtml"></div>
    <ng-template #txt>{{ text }}</ng-t"): ng:///TooltipsModule/TooltipBox.html@1:9
Property binding ngIf not used by any directive on an embedded template. Make sure that the property name is spelled correctly and all directives are listed in the "@NgModule.declarations". ("
    [ERROR ->]<div *ngIf="tooltipHtml; else txt" [innerHTML]="tooltipHtml"></div>
<ng-template #txt>{{ text }}<"): ng:///TooltipsModule/TooltipBox.html@1:4

经过一番搜索后，我得到了一些收敛到相同 的 awnsers：将 Ionic CommonModule 导入您的主模块。我这样做了，没有成功。

我的home.page.html:

<ion-content>
    <ion-button tooltip="I'm a tooltip below a button" positionV="bottom" arrow>
       Press me to see a tooltip
      </ion-button>
</ion-content>

home.module.ts:

import { NgModule } from '@angular/core';
import { CommonModule } from '@angular/common';
import { IonicModule } from '@ionic/angular';
import { FormsModule } from '@angular/forms';
import { RouterModule } from '@angular/router';

import { HomePage } from './home.page';

import { TooltipsModule } from 'ionic-tooltips';

@NgModule({
  imports: [
    CommonModule,
    FormsModule,
    IonicModule,
    RouterModule.forChild([
      {
        path: '',
        component: HomePage
      }
    ]),
    TooltipsModule.forRoot()
  ],
  declarations: [HomePage]
})
export class HomePageModule {}

app.module.ts（我最后尝试导入 CommonModule 的地方）：

import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { RouteReuseStrategy } from '@angular/router';

import { IonicModule, IonicRouteStrategy } from '@ionic/angular';
import { SplashScreen } from '@ionic-native/splash-screen/ngx';
import { StatusBar } from '@ionic-native/status-bar/ngx';

import { AppComponent } from './app.component';
import { AppRoutingModule } from './app-routing.module';

import { BrowserAnimationsModule } from '@angular/platform-browser/animations';

@NgModule({
  declarations: [AppComponent],
  entryComponents: [],
  imports: [BrowserModule, IonicModule.forRoot(), AppRoutingModule, BrowserAnimationsModule],
  providers: [
    StatusBar,
    SplashScreen,
    { provide: RouteReuseStrategy, useClass: IonicRouteStrategy }
  ],
  bootstrap: [AppComponent]
})
export class AppModule {}

如有遗漏，请追问

Answer 1

我没有解决这个问题，但我可以通过其他库 popperjs with the angular wrapper ngx-popper.

将工具提示与 Ionic v4 一起使用