Question

我希望获得outer text时select box selected <ion-option value="1">Agriculture</ion-option> // output: Agriculture

例如： <ion-item> <ion-label>Choose Industry Type</ion-label> <ion-select [(ngModel)]="getSelectedValue" (ionChange)="getOuterName($event)"> <ion-option value="1">Agriculture</ion-option> <ion-option value="2">Chemicals</ion-option> <ion-option value="3">Pesticides</ion-option> </ion-select> </ion-item>

这是演示： https://stackblitz.com/edit/ionic-m7jy2n?file=pages%2Fhome%2Fhome.ts

下面是我的 html

    getOuterName(event){
         console.log(this.getSelectedValue);

         alert(this.getSelectedValue);

        console.log(event);


}

下面是我的控制器

static double Q2(ArrayList<Integer> input) {
    Collections.sort(input);

    ArrayList<Double> input2 = new ArrayList<>();
    double sum = 0;
    double sum2 = 0;
    double sd = 0;

    for (int i = 0; i < input.size(); i++) {
        sum = sum + input.get(i);
    }

    double mean = sum / input.size();

    for (int i = 0; i < input.size(); i++) {
        input2.add((Math.pow((input.get(i) - mean), 2)));
    }

    for (int i = 0; i < input2.size(); i++) {
        sum2 = sum2 + input2.get(i);
    }

    double mean2 = sum2 / input2.size();

    sd = Math.sqrt(mean2);

    return sd;
}

Answer 1

只需删除值属性。

<ion-option>Agriculture</ion-option>
<ion-option>Chemicals</ion-option>
<ion-option>Pesticides</ion-option>

<强> DEMO

如何为选择框选择外部文本

1 个答案: