我使用的是最新版本的ionic 4.0.0,我试图在单击按钮时更新滑块的内容,但它不会更新内容,甚至在TypeScript代码中更改了数组值。下面是我的视图代码:
<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>
下面是我的打字代码:
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);
});
});}
正如您所看到的,如果我在控制台上成功地更改了contractPrice,但没有在“.Price-contract”目录中进行更改。
谢谢你的帮助。
发布于 2019-02-12 11:43:01
我不确定这是不是你的情况,但在离子4测试版中,我遇到了同样的问题,因为getActiveIndex()从1返回索引,而不是从0。例如,如果第一张幻灯片是活动的,它将返回1而不是0。
因此,尝试更改以下代码:
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);
});
}希望这能有所帮助。
https://stackoverflow.com/questions/54634850
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