Ionic 4键盘盖输入字段

问题描述 投票:0回答:3

我有一个Ionic 4应用程序,其中包含一个带有输入的表单。 当用户点击输入时,它会打开键盘,但它会隐藏内容,而不会滚动。 有没有办法解决?

这是我的代码:

<form #f="ngForm" (ngSubmit)="sendMail()">
   <ion-item>
     <ion-label position="floating">name
     </ion-label>
     <ion-input [(ngModel)]="senderName">
     </ion-input>
   </ion-item>

   <ion-item>
      <ion-label position="floating">mail
      </ion-label>
      <ion-input [(ngModel)]="senderMail">
      </ion-input>
    </ion-item>

    <ion-item class="borderedTextArea">
      <ion-textarea [(ngModel)]="mailText" style="height:150px;"></ion-textarea>
    </ion-item>

    <ion-button type="submit" style="float:left">send</ion-button>

</form>
cordova ionic-framework ionic4
3个回答
1
投票

我目前正在使用带有Cordova 9的Ionic4和所有最新的软件包,我在框架内找不到适合我的任何设置。最后,我做了这个完全绕过框架的解决方法。它有一个小动画,看起来很不错,所以我一直在使用它,直到框架正确解决这个问题。

global.scss

ion-app {
    /*animation of native keyboard show*/
    transition: margin 300ms;
}

app.component.ts

declare var $: any;

ngAfterViewInit() {
    // This element never changes.
    let ionapp = document.getElementsByTagName("ion-app")[0];

    window.addEventListener('keyboardDidShow', async (event) => {
        // Move ion-app up, to give room for keyboard
        let kbHeight: number = event["keyboardHeight"];
        let viewportHeight: number = $(window).height();
        let inputFieldOffsetFromBottomViewPort: number = viewportHeight - $(':focus')[0].getBoundingClientRect().bottom;
        let inputScrollPixels = kbHeight - inputFieldOffsetFromBottomViewPort;

        // Set margin to give space for native keyboard.
        ionapp.style["margin-bottom"] = kbHeight.toString() + "px";

        // But this diminishes ion-content and may hide the input field...
        if (inputScrollPixels > 0) {
            // ...so, get the ionScroll element from ion-content and scroll correspondingly
            // The current ion-content element is always the last. If there are tabs or other hidden ion-content elements, they will go above.
            let ionScroll = await $("ion-content").last()[0].getScrollElement();
            setTimeout(() => {
                $(ionScroll).animate({
                    scrollTop: ionScroll.scrollTop + inputScrollPixels
                }, 300);
            }, 300); // Matches scroll animation from css.
        }
    });
    window.addEventListener('keyboardDidHide', () => {
        // Move ion-app down again
        // Scroll not necessary.
        ionapp.style["margin-bottom"] = "0px";
    });
}

0
投票

我暂时用以下方法解决了这个Ionic bug:

...
<ion-texarea (ionFocus)="fixTextareaBug()">
...

在你的.ts

@ViewChild(IonTextarea)
public ionTextArea: IonTextarea;
private focusFix = false;

...
...

public fixTextareaBug() {
  setTimeout(() => {
    if (this.focusFix) {
      this.focusFix = false;
      return;
    }
    (this.ionTextArea as any).el.lastElementChild.blur();
    this.focusFix = true;
    (this.ionTextArea as any).el.lastElementChild.focus();
  }, TEXTAREA_TIMEOUT);
}

我希望它能解决你的问题


0
投票

我也有这个问题,但只在android中,我做的是创建一个获得聚焦元素和键盘高度的脚本,并使用jQuery我添加了marginTop,当键盘显示时,将主体移动到键盘上方,这是我的代码:

constructor(
    private platform: Platform,
    private keyboard: Keyboard
  ) {
    if(this.platform.is('android')){
      this.keyboard.onKeyboardShow().subscribe((e) => {
        const offset = $(document.activeElement).offset().top;
        let height = (offset - e.keyboardHeight)*-1;
        height = height > 0 ? 0 : height;      
        $('body').animate({ 'marginTop': height + 'px' }, 100);
      });
      this.keyboard.onKeyboardHide().subscribe(e => {
        $('body').animate({ 'marginTop': 0 + 'px' }, 100);
      });
    }
}

需要的库:

    npm install jquery
    npm install @types/jquery
    ionic cordova plugin add cordova-plugin-ionic-keyboard
    npm install @ionic-native/keyboard

进口

    import { Platform } from '@ionic/angular';
    import * as $ from "jquery";
    import { Keyboard } from '@ionic-native/keyboard/ngx';

不是优雅的解决方案,但它的工作原理

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