如何在离子2(搜索栏)中自动完成 [英] How to do auto-complete in ionic 2 (search-bar)
问题描述
我正在尝试在搜索栏中自动完成我到目前为止所做的事情。
I am trying to do an auto complete in my search bar what i have done so far is.
我有一个包含一些字符串的数组。然后我试图在我的项目中列出我能够搜索特定项目。
I have an array with some strings. and then i am trying to list in my items it i am able to search the particualr item.
但我的要求是不要在列表中显示项目。我必须单击搜索栏,所有数组中的字符串应该来,我必须进行搜索。
But my requirement is not to display the items in a list. I have to make on clicking the search bar all the strings in array should come and the i have to make a search.
<ion-header>
<ion-navbar>
<ion-title>search</ion-title>
</ion-navbar>
<ion-toolbar primary >
<ion-searchbar (ionInput)="getItems($event)" autocorrect="off"></ion-searchbar>
</ion-toolbar>
</ion-header>
<ion-content padding>
<ion-list>
<ion-item *ngFor="let item of items">
{{ item }}
</ion-item>
</ion-list>
</ion-content>
search.ts文件的代码:
Code for search.ts file:
import { Component } from '@angular/core';
import { NavController } from 'ionic-angular';
/*
Generated class for the SearchPage page.
See http://ionicframework.com/docs/v2/components/#navigation for more info on
Ionic pages and navigation.
*/
@Component({
templateUrl: 'build/pages/search/search.html',
})
export class SearchPage {
private searchQuery: string = '';
private items: string[];
constructor(private navCtrl: NavController) {
this.initializeItems();
}
initializeItems() {
this.items = [
'Amsterdam',
'Bogota',
]
}
getItems(ev: any) {
// Reset items back to all of the items
this.initializeItems();
// set val to the value of the searchbar
let val = ev.target.value;
// if the value is an empty string don't filter the items
if (val && val.trim() != '') {
this.items = this.items.filter((item) => {
return (item.toLowerCase().indexOf(val.toLowerCase()) > -1);
})
}
}
}
问题:
如何通过离子2中的自动完成获取数组的值。
How to get the value of an array through auto complete in ionic 2.
推荐答案
为了实现这一点,您只需要在代码中添加一些小东西。请查看此plunker 。
In order to achieve that, you just need to add a small thing to your code. Please take a look at this plunker.
就像你可以看到的那样,使用 showList
变量,我们只能在用户搜索过某些内容后显示结果。
Like you can see there, with the showList
variable we can show the results only after the user has searched something.
<ion-list *ngIf="showList">
<ion-item *ngFor="let item of items">
{{ item }}
</ion-item>
</ion-list>
我们首先将该变量设置为 false
in 构造函数
然后我们在 getItems(...)<中将它设置为
true
/ code>方法。
We first set that variable to false
in the constructor
and then we set it to true
inside the getItems(...)
method.
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