ionic3自定义单选

import { Component } from '@angular/core';
import { NavController } from 'ionic-angular';

@Component({
  selector: 'page-home',
  templateUrl: 'home.html'
})
export class HomePage {
  list=[{"key":"you","value":'优',"chek":true},{"key":"liang","value":'良',"chek":false},{"key":"cha","value":'差',"chek":false}];
  data={"key":"you","value":'优',"chek":true};
  constructor(public navCtrl: NavController) {

  }
   public  chekFun(i){
      let me=this;
      this.list.forEach(function(data,inde,array) {
        if(i==inde){
          data.chek=true;
          me.data=data;
        }else{
          data.chek=false
        }
      });
    }

  public submit(){
    console.log(this.data);
  }
}

　　

<ion-header>
  <ion-navbar>
    <ion-title>
     自定义单选
    </ion-title>
  </ion-navbar>
</ion-header>

<ion-content padding>
  <ion-grid text-center>
    <ion-row style="font-size: 1.7em;">
      <ion-col  col-4  *ngFor="let item of list,let i =index" (click)="chekFun(i)">{{item.value}}&nbsp; <ion-icon name="checkmark-circle"  [ngClass]="{'button-clear-ios-primary': item.chek,'button-clear-ios-my':!item.chek}"></ion-icon></ion-col>
    </ion-row>
  </ion-grid>
  <button ion-button block (click)="submit()">提交</button>
</ion-content>