我想要将焦点设置在我的< ion-input>当我进入页面
这是我的脚本代码：
import { Component,Input,ViewChild,ElementRef,Renderer } from '@angular/core';
import { NavController,PopoverController,NavParams,ViewController,ModalController } from 'ionic-angular';
@Component({
selector: 'page-comments',templateUrl: 'comments.html'
})
export class CommentsParentPage {
@ViewChild('input') myInput;
constructor(public navCtrl: NavController,private renderer: Renderer,private elementRef: ElementRef,public modalCtrl: ModalController) {
}
ionViewLoaded() {
setTimeout(() => {
let element = this.elementRef.nativeElement.querySelector('input');
this.renderer.invokeElementMethod(element,'focus',[]);
},150);
}
}
这是我用html文件做的：
<ion-item>
<ion-input set-focuser type="text" placeholder="Write Your Comments" [(ngModel)]="addComment"></ion-input>
</ion-item>
每当我进入我的应用程序的这个页面,我想要打开键盘,并将焦点设置为离子输入
我的config.xml包括：
<preference name="KeyboardDisplayRequiresUserAction" value="false" />
package.json
{
"name": "sample app","author": "","homepage": "http://ionicframework.com/","private": true,"scripts": {
"clean": "ionic-app-scripts clean","build": "ionic-app-scripts build","ionic:build": "ionic-app-scripts build","ionic:serve": "ionic-app-scripts serve"
},"dependencies": {
"@angular/common": "2.2.1","@angular/compiler": "2.2.1","@angular/compiler-cli": "2.2.1","@angular/core": "2.2.1","@angular/forms": "2.2.1","@angular/http": "2.2.1","@angular/platform-browser": "2.2.1","@angular/platform-browser-dynamic": "2.2.1","@angular/platform-server": "2.2.1","@ionic-native/core": "^3.4.4","@ionic-native/keyboard": "^3.4.4","@ionic/cloud-angular": "^0.10.0","@ionic/storage": "1.1.7","angular2-moment": "^1.1.0","google-libphonenumber": "^2.0.14","ionic-angular": "2.0.0-rc.4","ionic-gallery-modal": "0.0.7","ionic-native": "2.2.11","ionicons": "3.0.0","rxjs": "5.0.0-beta.12","zone.js": "0.6.26"
},"devDependencies": {
"@ionic/app-scripts": "1.0.0","typescript": "2.0.9"
},"cordovaPlugins": [
"ionic-plugin-keyboard","cordova-plugin-whitelist","cordova-plugin-console","cordova-plugin-statusbar","cordova-plugin-device","cordova-plugin-splashscreen","cordova-sqlite-storage","cordova-plugin-x-toast","cordova-plugin-camera","cordova-plugin-compat","cordova-plugin-image-picker","cordova.plugins.diagnostic",{
"id": "phonegap-plugin-push","locator": "phonegap-plugin-push","variables": {
"SENDER_ID": "461076790064"
}
},"cordova-plugin-contacts","ionic-plugin-deploy","cordova-plugin-x-socialsharing",{
"locator": "https://github.com/napolitano/cordova-plugin-intent","id": "com.napolitano.cordova.plugin.intent"
},"cordova-plugin-screen-orientation","cordova-plugin-file","cordova-plugin-file-transfer"
],"cordovaPlatforms": [
{
"platform": "android","version": "","locator": "android"
}
],"description": "ionic2: An Ionic project"
}
解决方法
使用ngAfterViewChecked：
见plnkr here
import { Component,Renderer,AfterViewChecked,ChangeDetectorRef } from '@angular/core';
import { NavController,templateUrl: 'comments.html'
})
export class CommentsParentPage implements AfterViewChecked {
@ViewChild('input') myInput;
needsFocus: boolean;
constructor(public navCtrl: NavController,public modalCtrl: ModalController,private _changeDetectionRef: ChangeDetectorRef) {
}
ionViewDidEnter() {
this.needsFocus = true;
}
public ngAfterViewChecked(): void {
if (this.needsFocus) {
this.needsFocus = false;
this.myInput.setFocus();
this._changeDetectionRef.detectChanges();
}
}
