值后的数据更新，angular2和打字稿视图不更新 [英] value not updating in the view after data update , angular2 and typescript

问题描述

这是我的 ngOnInit 函数

 instance.input = document.getElementById('google_places_ac');
        autocomplete = new google.maps.places.Autocomplete(instance.input, { types: ['(cities)']});
        google.maps.event.addListener(autocomplete, 'place_changed', function () {
            var place = autocomplete.getPlace();
            instance.setValue(place.address_components[3].long_name, place.address_components[2].long_name, place.address_components[1].long_name);

         });

这是我的的setValue（）函数

public setValue(a,b,c) {
    this.coutnry = a;
    this.state = b;
    this.city = c;
    this.sharedService.country = this.coutnry;
    this.sharedService.city = this.city;
    this.sharedService.state = this.state;
    console.log(a, b, c);
}

和下面是我的HTML模板显示和获取值

and below is my html template to show and get the values

 <input id="google_places_ac" attr.state="{{state}}" attr.country="{{coutnry}}" name="google_places_ac" type="text" value="{{city}}" class="form-control" />

问题是我的HTML属性没有得到一次 place_changed 更新函数被调用，有什么我需要做的得到更新的观点价值观？

the problem is my html attributes not getting updated once place_changed function is called,is there anything i have to do to get updated values on view?

推荐答案

您可以检查此angular2官方的文档设立的属性，

you can check this angular2 official docs for setting up the attributes,

的cheatsheet - https://angular.io/docs/ts/latest/cheatsheet。 HTML

cheatsheet - https://angular.io/docs/ts/latest/cheatsheet.html

<input id="google_places_ac" [attr.state]="state" [attr.country]="coutnry"
name="google_places_ac" type="text" value="{{city}}" class="form-control" />

---

更新

import { Component, ChangeDetectorRef } from 'angular2/core';

constructor(private cdr:ChangeDetectorRef) {
}
public setValue(a,b,c) {
    this.coutnry = a;
    this.state = b;
    this.city = c;
    this.sharedService.country = this.coutnry;
    this.sharedService.city = this.city;
    this.sharedService.state = this.state;
    console.log(a, b, c);
    this.cdr.detectChanges();
}

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