你如何在角4自动完成材料中调用closePanel

Question

import { MdAutocomplete } from '@angular/material';

@Component({
 template:'
             <input type="text" [mdAutocomplete]="auto"/>
             <md-autocomplete #auto="mdAutocomplete" #autoComplete>
             <md-option>
               Some Options
             </md-option>
          </md-autocomplete>'
})

export class AutoComplete {
 @ViewChild('autoComplete') autoComplete: MdAutocomplete;

 closeAuto() {
   this.autoComplete.closePanel();
 }
}

它不是完整的代码,但想法是在方法中调用closePanel.closePanel在https://material.angular.io/components/autocomplete/api上列为方法,但无法正常工作.它说找不到方法.

也试过这种方法

import { MdAutocompleteTrigger } from '@angular/material';

@Component({
 template:'
             <input #autoCompleteInput type="text" [mdAutocomplete]="auto"/>
             <md-autocomplete #auto="mdAutocomplete" #autoComplete>
             <md-option>
               Some Options
             </md-option>
          </md-autocomplete>'
})

export class AutoComplete {
 @ViewChild('autoCompleteInput') autoComplete: MdAutocompleteTrigger;

 closeAuto() {
   this.autoComplete.closePanel();
 }
}

Answer 1

ElementRef如果未指定read选项,则默认情况下从html元素读取Angular .

所以

模板

<input #autoCompleteInput type="text" [matAutocomplete]="auto"/>

零件

@ViewChild('autoCompleteInput', { read: MatAutocompleteTrigger }) 
autoComplete: MatAutocompleteTrigger;

以下是演示此方法的Plunker示例.