import { Component, ViewChild} from '@angular/core';
import { Keyboard } from 'ionic-native';
@Component({
templateUrl: 'build/pages/home/home.html'
})
export class HomePage {
@ViewChild('input') myInput ;
constructor() {}
ionViewDidLoad() {
setTimeout(() => {
Keyboard.show() // for android
this.myInput.setFocus();
},150);
}
}
1)导入“ViewChild”
import {Component, ViewChild} from '@angular/core';
2)在html模板中创建对输入的引用:
<ion-input #focusInput></ion-input>
3)使用@ViewChild访问您刚才引用的输入组件。
@ViewChild('focusInput') myInput ;
4)触发焦点
每次加载视图/页面时,使用ionViewLoaded()方法触发它。
需要setTimeout
ionViewLoaded() {
setTimeout(() => {
Keyboard.show() // for android
this.myInput.setFocus();
},150); //a least 150ms.
}
4)在Android上显示键盘
import { Keyboard } from 'ionic-native';
调用Keyboard.show()在Android上调用键盘。
5)在iOS上显示键盘
将此行添加到config.xml以使其在iOS上运行:
<preference name="KeyboardDisplayRequiresUserAction" value="false" />
在mhartington的伟大文章的帮助下:http://mhartington.io/post/setting-input-focus/
您无需从'angular / core'导入'Input'。
只是:
import {Component,ViewChild} from '@angular/core';
import {NavController, TextInput } from 'ionic-angular';
@Component({
templateUrl: 'build/pages/home/home.html'
})
export class HomePage {
@ViewChild('input') myInput: TextInput;
constructor(private navCtrl: NavController) { }
ionViewDidLoad() {
setTimeout(() => {
this.myInput.setFocus();
},150);
}
}
并回答对Ciprian Mocanu的评论:
它在iOS中不起作用:(
它适用于iOS - >使用iOS 10在iPhone 6 PLUS上查看
设置超时对我有用!
setTimeout(() => {
this.inputToFocus.setFocus();
}, 800);
但是,如果添加了新的输入元素,它会将焦点设置为仅第一个输入。
我认为您应该为此制定一个全局指令,因为您可能不止一次想要这种行为。
import { ViewChild, ElementRef, Directive, OnInit } from '@angular/core';
import { Keyboard } from 'ionic-native';
@Directive({
selector: '[autofocus]'
})
export class FocusInput implements OnInit {
@ViewChild('myinput') input
private focused: boolean
ngOnInit(){
this.focused = true
}
ionViewDidLoad() {
if (this.focused) {
setTimeout(()=>{
this.input.setFocus()
this.focused = false
Keyboard.show()
}, 300)
}
}
}
现在你在ion-input
字段上添加autofocus
属性
<ion-input #myinput type="..." placeholder="..."
(keyup.enter)="someAction()"
autofocus ></ion-input>
以上都不适合我。以下是我的解决方法:
import { ElementRef, AfterViewChecked, Directive } from '@angular/core';
import {Keyboard} from 'ionic-native';
@Directive({
selector: '[autofocus]'
})
export class FocusInput implements AfterViewChecked {
private firstTime: boolean = true;
constructor(public elem: ElementRef) {
}
ngAfterViewChecked() {
if (this.firstTime) {
let vm = this;
setTimeout(function(){
vm.elem.nativeElement.firstChild.focus();
vm.firstTime = false;
Keyboard.show();
}, 300)
}
}
}
然后在你的离子输入字段中添加autofocus属性:
<ion-input #input type="text" placeholder="..."
[(ngModel)]="myBoundVariable"
(keyup.enter)="myEnterKeyAction()"
autofocus></ion-input>
在浏览器和Android上测试不是IOS,但没有理由它不应该工作。
import {Component, ViewChild} from '@angular/core';
import {NavController} from 'ionic-angular';
@Component({
templateUrl: 'build/pages/home/home.html'
})
export class HomePage {
@ViewChild('Comment') myInput ;
constructor(private navCtrl: NavController) { }
ionViewLoaded() {
setTimeout(() => {
this.myInput.setFocus();
},150);
}
}
Create a reference to your input in your template :
<ion-input #Comment>
import {Component,ViewChild} from '@angular/core';
import {NavController} from 'ionic-angular';
@Component({
templateUrl: 'build/pages/home/home.html'
})
export class HomePage {
@ViewChild('myInput') myInput ;
constructor(private navCtrl: NavController) { }
ionViewDidLoad() {
window.setTimeout(() => {
this.myInput.setFocus();
}, 600); //SET A LONG TIME IF YOUR ARE IN A MODAL/ALERT
}
}
<ion-input #myInput ></ion-input>
我发现这个解决方案也解决了键盘推送内容的问题。
<ion-list>
<ion-item>
<ion-label>Name</ion-label>
<ion-input #inputRef type="text"></ion-input>
</ion-item>
<button ion-button (click)="focusMyInput(inputRef)">Focus</button>
@ViewChild(Content) content: Content;
focusMyInput(inputRef) {
const itemTop = inputRef._elementRef.nativeElement.getBoundingClientRect().top;
const itemPositionY = this.content.scrollTop + itemTop -80;
this.content.scrollTo(null, itemPositionY, 500, () => {
inputRef.setFocus();
});
}
在我的情况下,由于某种原因,ionViewLoaded()没有被触发。尝试ionViewDidLoad()并将计时器设置为200,它工作。
150对我来说太早了。完整解决方案
import { Component, ViewChild } from '@angular/core';//No need to import Input
export class HomePage {
@ViewChild('inputToFocus') inputToFocus;
constructor(public navCtrl: NavController) {}
ionViewDidLoad()
{
setTimeout(() => {
this.inputToFocus.setFocus();
},200)
}
}
并在输入标签上:
<ion-input type="text" #inputToFocus></ion-input>
对于IOS和Android来说,它对我来说很好。将焦点代码放在ionViewWillEnter()中。
import { Component, ViewChild, ElementRef } from '@angular/core';
import { Keyboard } from '@ionic-native/keyboard';
@Component({
selector: 'page-home',
templateUrl: 'home.html'
})
export class HomePage {
@ViewChild("Input") inputEl: ElementRef;
constructor(public keyboard:Keyboard){}
ionViewWillEnter() {
setTimeout(() => {
this.inputEl.nativeElement.focus();
this.keyboard.show();
}, 800); //If its your first page then larger time required
}
在html文件中输入标签
<ion-input type="text" #Input></ion-input>
并将此行添加到config.xml以使其在iOS上运行:
<preference name="KeyboardDisplayRequiresUserAction" value="false" />
如果需要将焦点设置在init组件的输入上,请将类input-has-focus默认设置为ion-item,如下所示:
<ion-item class="input-has-focus">
就这样!