我正在使用最新版本的ionic 4.0.0 我正在尝试在单击按钮时更新滑块的内容,但即使TypeScript代码中的数组值已更改,也无法更新内容。 这是我的查看代码:
<ion-slides class="main-slide" pager=true loop="true" #mainSlider [options]="mainSliderOpts">
<ion-slide class="change-display" *ngFor="let product of products;">
<div class="item-container">
<div class="strike-title">Strike Price</div>
<div class="devider"></div>
<p class="description">
To at least what price do you think the stock will move from its current price if
<strong>${{product.price}}</strong>?
</p>
<div class="lose" [ngClass]="{ 'profit': product.profit > 0,'lose': product.profit < 0 }">
<span *ngIf="product.profit > 0">+</span>{{product.profit}}%
</div>
<div class="price-contract">
PRICE PER CONTRACT: <strong>${{product.contractPrice}}</strong>
</div>
<ion-button class="next-btn" (click)=priceSliderChanged() expand="full" color="dark">Change Values</ion-button>
</div>
</ion-slide>
这是我的打字稿代码:
constructor() {
this.products = [{
title: 'NFLX',
price: 313.2,
prices: [
297.50,
295.00,
292.75,
290.75
],
profit: 4,
contractPrice: 400 //defalt price
},
{
title: 'NFLX 1',
price: 413.2,
prices: [
297.50,
295.00,
292.75,
290.75
],
profit: -6.6,
contractPrice: 500 //defalt price
},
{
title: 'NFLX 2',
price: 213.2,
prices: [
297.50,
295.00,
292.75,
290.75
],
profit: -7,
contractPrice: 300 //defalt price
}
]
}
priceSliderChanged(){
this.mainSlider.getActiveIndex().then((index) => {
var activeProduct = this.products[index];
activeProduct.profit = this.randomIntFromInterval(-5, 6);
activeProduct.contractPrice = this.randomIntFromInterval(350, 460);
//setTimeout(()=>{
this.mainSlider.update().then((d: any) => {
// alert(d);
});
});
}
如您所见,如果我进行控制台操作,contractPrice已成功更改,但未在“ .price-contract” div中更改。
感谢您的帮助。
答案 0 :(得分:1)
我不确定您是否遇到这种情况,但是在Ionic 4 beta版中,我遇到了同样的问题,因为getActiveIndex()
从1返回索引,而不是从0返回索引。例如,如果第一张幻灯片处于活动状态,它将返回1而不是0。
因此,尝试更改此代码:
priceSliderChanged() {
this.mainSlider.getActiveIndex().then((index) => {
index-=1; //add this code
var activeProduct = this.products[index];
activeProduct.profit = this.randomIntFromInterval(-5, 6);
activeProduct.contractPrice = this.randomIntFromInterval(350, 460);
});
}
希望这会有所帮助。