如何在 angularjs 材料滑块中显示文本代替数字

How to display text in place of number in angularjs materials silder

当您单击滑块时,我想要什么,然后在其工具提示上显示文本代替数字。

代码如下:

HTML:

<div ng-controller="AppCtrl" class="sliderdemoBasicUsage" ng-app="MyApp">
  <br>
  <br>
  <br>
  <br>
  <md-content style="margin: 16px; padding:16px">
    <br>
    <br>
   <md-slider flex class="md-primary" md-discrete ng-model="rating3" step="1" min="1" max="5" aria-label="rating">
      </md-slider>
  </md-content>
</div>

Angular代码:

angular.module('MyApp')

.controller('AppCtrl', function($scope) {
});

或者您可以参考以下link https://codepen.io/ankur-tiwari/pen/bVNEKJ

遗憾的是,该功能不受支持,因为它在技术上不是 material spec for sliders 的一部分。

对于李克特量表,您应该考虑 selection controls spec of material. Otherwise, you can get away with it in Angular Material by using a horizontal row of radio buttons

<p ng-bind="val" ng-init="val=20"></p>
            <div class="slider" ui-jq="slider"  ng-slider-model="val" ui-options="sliderOpt4"></div>
          </div>

这是一个指令,您可以使用 html 和 css

访问和显示控制器值的值。
.directive('ngSliderModel', ['$parse', function($parse) {
   return {
     scope: {
       ngSliderModel: '=',
       uiOptions: '='
     },
     restrict: 'A',
     required: ['ngSliderModel'],
     link: function(scope, element, attrs) {
       // check there is uiOption or not 
       var options = ('uiOptions' in attrs) ? scope.uiOptions : {};
       // get the value of ngSlider Model 
       var val = scope.ngSliderModel;
       // if value is  range   [15,25]   then return values for uiOptions propertyName  else value for singles   
       var propName = (angular.isArray(val)) ? 'values' : 'value';
       /* if you  want to slide when the scope value changed not from slider... 
        watch the ngSliderModel attribute 
       */
       scope.$watch('ngSliderModel', function(newValue){

         element.slider(propName, newValue);
       });
       // set value for options 
       options[propName] = val;
       // binding slide event 
       element.bind('slide', function() {
         // Read the current value 
         var value = element.slider('option', propName);

         scope.$apply(function() {
           // Apply the value to scope 
           scope.ngSliderModel = value;
         });
       });
     }
   };
 }]);

Angular Material不支持

有关 angular-material 模块

slider.js 的更多详细信息检查
function SliderDirective($$rAF, $window, $mdAria, $mdUtil, $mdConstant, $mdTheming, $mdGesture, $parse, $log) {
  return {
    scope: {},
    require: '?ngModel',
    template:
      '<div class="md-slider-wrapper">\
        <div class="md-track-container">\
          <div class="md-track"></div>\
          <div class="md-track md-track-fill"></div>\
          <div class="md-track-ticks"></div>\
        </div>\
        <div class="md-thumb-container">\
          <div class="md-thumb"></div>\
          <div class="md-focus-thumb"></div>\
          <div class="md-focus-ring"></div>\
          <div class="md-sign">\
            <span class="md-thumb-text"></span>\
          </div>\
          <div class="md-disabled-thumb"></div>\
        </div>\
      </div>',
    compile: compile
  };

在此代码中

 <span class="md-thumb-text"></span>

用于渲染滑块的范围数。 并使用以下方法来呈现它

function postLink(scope, element, attr, ngModelCtrl){
}

你可以这样修改函数的内容

var _values = ["very low", "low", "average", "good", "best"];
thumbText.text( _values[ngModelCtrl.$viewValue] );

呈现文本而不是整数值。

Angular-material 目前不支持此功能,您如何通过编写自己的逻辑或创建自己的滑块来完成此操作。

Material 2 团队已经解决了这个问题,可能很快就会提出解决方案。 https://github.com/angular/material2/issues/4776

最终在将 angular.js 更新为 Angular 之后,Angular Material 为 Angular 提供了 自定义缩略图标签格式 的选项滑块。

import {Component} from '@angular/core';

/**
 * @title Slider with custom thumb label formatting.
 */
@Component({
  selector: 'slider-formatting-example',
  templateUrl: 'slider-formatting-example.html',
  styleUrls: ['slider-formatting-example.css'],
})
export class SliderFormattingExample {
  formatLabel(value: number | null) {
    if (!value) {
      return 0;
    }

    if(value < 250)
    {
        return 'Low';
    }
    else if(value > 250 && value < 750)
    {
       return 'Medium';
    }
    else
    {
        return 'High';
    }

    return value;
  }
}

Html代码:

<mat-slider
  thumbLabel
  [displayWith]="formatLabel"
  tickInterval="1000"
  min="1"
  max="100000"></mat-slider>

Note: I update my app from angular.js to Angular latest version.