如果条件满足,在Angular中显示图像

Showing Images in Angular if condition is met

本文关键字:显示 显示图 图像 Angular 条件 满足 如果      更新时间:2023-09-26

我有一个API调用返回一个数字。根据这个数字,我想要显示一个特定的图像。

例如:

0 to 100:   icon1.png
101 to 200: icon2.png
201 to 300: icon3.png
301 to 400: icon4.png
401 to 500: icon5.png
501 to 600: icon6.png
$scope.result = 60
How would I get the result to show icon1.png?
// index.html
{{results.[0].id}} // this shows up as a number and i would like to have the image rendered here
{{results.[1].id}}
{{results.[2].id}} 
// app.js
$scope.submit = function () {
  var url = 'http://api.com';
  $http.get(url)
    .then(function (response) {
      $scope.results = response;
    });
  };

只需一点点数学运算就可以很容易地完成。可以使用Math.floor()来计算要显示的图像的索引。并使用ng-if根据其索引显示正确的图像。

angular
.module('app', [])
.controller('AppCtrl', function($scope) {
  $scope.images = [
    { src : 'http://lorempixel.com/400/200/sports/1' },
    { src : 'http://lorempixel.com/400/200/sports/2' },
    { src : 'http://lorempixel.com/400/200/sports/3' },
    { src : 'http://lorempixel.com/400/200/sports/4' },
    { src : 'http://lorempixel.com/400/200/sports/5' }
  ];
  $scope.result = 60;
  $scope.computedIndex = Math.floor($scope.result / 100);
});
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>
<div ng-app="app">
  <div ng-controller="AppCtrl">
    <img ng-repeat="image in images" ng-if="computedIndex === $index" src="{{ image.src }}">
  </div>
</div>

注意,在本例中,100对应于您在问题中指定的间隔。每次你的服务器发送回一个新的result,你必须重新计算$scope.computedIndex

根据API调用的响应,您可以在$scope中设置图像名称并在标记中显示。这是一个伪代码

if ($scope.result BETWEEN 1 TO 100)
    $scope.img= ="icon1.png"

if ($scope.result BETWEEN 101 TO 200)
    $scope.img= ="icon2.png"

等。BETWEEN必须用条件运算符

代替