如何在离子 3 中绑定 <ion-segment> 和 <ion-slides> 的事件？

Question

我正在制作一个电子商务应用程序。在我的主页上，我按类别显示我的产品。我同时使用 ion-segment 和 ion-slides，以便用户能够一次滚动和选择两者。当我有三个类别时很好，所有类别都在家里显示，但是当我增加类别时，其他类别在屏幕后面。类别产品显示正常，但类别名称在里面并且不可见。我想滚动屏幕上同时显示的类别名称和产品。那就是我想让活动段在屏幕上可见，当段不在屏幕上时。提前致谢:-)

<ion-content>
<ion-segment color="dark" [(ngModel)]="tabs" style="width:640px;">
    <ion-segment-button *ngFor="let i of productcategory" (click)="selectTab(i)" value="{{i.inc}}" >{{i.category_name}}</ion-segment-button>
    <div id="slide" class="slide"></div>
</ion-segment>

<ion-slides #pageSlider (ionSlideWillChange)="changeWillSlide($event)">
    <ion-slide *ngFor="let i of productcategory">

            <ion-list>
                    <div *ngFor="let pr of products; let i=index" text-wrap class="swipe-tabs">

                            <div class="swipe-tabs-1">  
                                    <img src="http://example.com/{{pr.tbl_product_image}}" />
                                    <button ion-button (click)="removefromcart(pr,i)">-</button>
                                    <button ion-button color="light" *ngIf="check">{{quan[i]}}</button>
                                    <button ion-button color="light" *ngIf="!check">0</button>
                                    <button ion-button (click)="addToCart(pr,i)">+</button>
                                </div>
                        <div class="swipe-tabs-2">
                            <h2>{{pr.tbl_product_name}} </h2>

                            <ion-list  radio-group  >
                                <ion-item *ngFor="let p of pr.pricevariant; let j=index;">
                                    <ion-label>{{p.weight}} &nbsp; &nbsp; <span class="colr-red">? {{p.dprice}}</span></ion-label>
                                    <ion-radio  [value]="p.weight" (ionSelect)="getdata(pr,p,i,j)" ></ion-radio>                                
                                </ion-item>
                            </ion-list>
                        </div>
                        <div class="border-hr"></div>
                    </div>

                </ion-list> 
    </ion-slide>
</ion-slides>

Answer 1

我通过在标题中制作内容并在滑动过程中调整一些事件来做到这一点：-

<ion-header>
<ion-content #scroll scrollX="true" scrollY="true" style="height: 50px;">
    <ion-segment class="SwipedTabs-tabs">
        <ion-segment-button *ngFor='let tab of tabs ; let i = index ' value="IngoreMe" (click)="selectTab(i)" [ngClass]='{ "SwipedTabs-activeTab" : ( this.SwipedTabsSlider  && ( this.SwipedTabsSlider.getActiveIndex() === i || (  tabs.length -1 === i&& this.SwipedTabsSlider.isEnd()))) }'
            [ngStyle]="{'width.px': (this.tabElementWidth_px)}">
            {{tab}}
        </ion-segment-button>
    </ion-segment>
    <!-- here is our dynamic line  "indicator"-->
    <div id='indicator' class="SwipedTabs-indicatorSegment" [ngStyle]="{'width.px': (this.tabElementWidth_px)}"></div>
</ion-content>

<ion-slides #SwipedTabsSlider (ionSlideDrag)="animateIndicator($event)" (ionSlideWillChange)="updateIndicatorPosition()" (ionSlideDidChange)="updateIndicatorPosition()" (pan)="updateIndicatorPosition()" [pager]="false">

在打字稿中：-

    this.tabs=["SNACKS","SWEETS","NAMKKEN","BAKERY","MISC","ETC"]; 

 selectTab(index) {
this.SwipedTabsIndicator.style.webkitTransform = 'translate3d('+(100*index)+'%,0,0)';
 this.scroll.scrollTo(index*this.tabElementWidth_px,0,500);
this.SwipedTabsSlider.slideTo(index, 500);}

updateIndicatorPosition() {
this.scroll.scrollTo(this.SwipedTabsSlider.getActiveIndex()*this.tabElementWidth_px,0,200);

  // this condition is to avoid passing to incorrect index
if( this.SwipedTabsSlider.length()> this.SwipedTabsSlider.getActiveIndex())
{
  this.SwipedTabsIndicator.style.webkitTransform = 'translate3d('+(this.SwipedTabsSlider.getActiveIndex() * 100)+'%,0,0)';
}
this.j=this.SwipedTabsSlider.getActiveIndex();
}

在CSS中：

page-home {
.segment-ios .segment-button {
    overflow: inherit !important;
    color: #fff !important;
    padding: 0 10px;
    border-right: 1px solid white !important;
    width: auto !important;
}
.SwipedTabs-indicatorSegment {
    -webkit-transition: 0.3s all;
    -moz-transition: 0.3s all;
    -o-transition: 0.3s all;
    transition: 0.3s all;
    transform-origin: top 0 left 0;
    height: 1px;
    position: relative;
    top: -2px;
    background-color: white !important;
}
.SwipedTabs-tabs ion-segment-button {
    border: none !important;
    color: black!important;
    background-color: blue!important;
    display: -webkit-inline-box;
}
.SwipedTabs-tabs ion-segment-button.SwipedTabs-activeTab {
    color: white !important;
    font-size: 17px;
    font-weight: bold;
}
.SwipedTabs-tabs {
    width: fit-content !important;
    border-bottom: solid 1px #e6e6e6 !important;
}
.scroll-content {
    display: flex;
    left: -3px;
    right: 0;
    top: 3px;
}
.swiper-container {
    overflow-y: scroll !important;
}
scroll-content {
    margin-top: 35px;
    margin-bottom: -297px;
}
.SwipedTabs-tabs ion-segment-button {
    color: #fff !important;
    padding: 0 10px;
}

}