filter.ts

import {Component} from '@angular/core';
import {NavParams, ViewController} from "ionic-angular";

@Component({
    selector: 'filter',
    templateUrl: 'filter.html'
})
export class FilterComponent {

    list = [];
    choose;

    constructor(private params: NavParams,
                private viewCtrl: ViewController) {
        this.list = this.params.get("list");
        this.choose = this.params.get("choose");
    }

    dismiss() {
        const data = {
            choose:this.choose
        }
        this.viewCtrl.dismiss(data);
    }

}