Angular 8 mat-autocomplete 错误 - “matAutocomplete”，因为它不是“输入”的已知属性

Question

我尝试使用与 Angular 8 一起使用的materialUI 的示例，mat-chip-list 在没有 mat-autocomplete 的情况下可以正常工作，但我需要它。 这是我的代码：

        <mat-chip-list #chipList aria-label="Content selection">
          <mat-chip *ngFor="let item of content" [selectable]="selectable"
                   [removable]="removable" (removed)="remove(item)">
            {{item}}
            <mat-icon matChipRemove *ngIf="removable">cancel</mat-icon>
          </mat-chip>
          <input matInput 
                 #contentInput
                 [formControl]="contentCtrl" 
                 [matAutocomplete]="auto"
                 [matChipInputFor]="chipList"
                 [matChipInputSeparatorKeyCodes]="separatorKeysCodes"
                 [matChipInputAddOnBlur]="addOnBlur"
                 (matChipInputTokenEnd)="add($event)">
        </mat-chip-list>
        <mat-autocomplete #auto="matAutocomplete" (optionSelected)="selected($event)">
          <mat-option *ngFor="let item of filteredContent | async" [value]="item">
            {{item}}
          </mat-option>
        </mat-autocomplete>
      </mat-form-field>

我得到这个错误：

Can't bind to 'matAutocomplete' since it isn't a known property of 'input'. ("
        #contentInput
        [formControl]="contentCtrl" 
        [ERROR ->][matAutocomplete]="auto"
        [matChipInputFor]="chipList"
        [matChipInputSeparatorKeyCode"): ng:///AppModule/InviteMemberComponent.html@60:8
    at syntaxError (compiler.js:2175)
    at TemplateParser.parse (compiler.js:11388)
    at JitCompiler._parseTemplate (compiler.js:25963)
    at JitCompiler._compileTemplate (compiler.js:25951)
    at compiler.js:25895
    at Set.forEach (<anonymous>)
    at JitCompiler._compileComponents (compiler.js:25895)
    at compiler.js:25808
    at Object.then (compiler.js:2166)
    at JitCompiler._compileModuleAndComponents (compiler.js:25807)

我不明白为什么会出现此错误:(

Answer 1

问题修复：

1) open app.module.ts 
2) import MatAutocompleteModule from @angular/material
3) add MatAutocompleteModule to the NgModule imports

为我解决了这个问题！