Angular确实在HTML指令中提供了一些使用数字的for循环的支持:
<div data-ng-repeat="i in [1,2,3,4,5]">
do something
</div>
但是，如果作用域变量包含一个具有动态数字的范围，那么每次都需要创建一个空数组。
在控制器中
var range = [];
for(var i=0;i<total;i++) {
range.push(i);
}
$scope.range = range;
在HTML中
<div data-ng-repeat="i in range">
do something
</div>
这是可行的，但这是不必要的，因为我们在循环中根本不会使用范围数组。有人知道设置最小/最大值的范围或规则吗?
喜欢的东西:
<div data-ng-repeat="i in 1 .. 100">
do something
</div>
当前回答
我使用自定义ng-repeat-range指令:
/**
* Ng-Repeat implementation working with number ranges.
*
* @author Umed Khudoiberdiev
*/
angular.module('commonsMain').directive('ngRepeatRange', ['$compile', function ($compile) {
return {
replace: true,
scope: { from: '=', to: '=', step: '=' },
link: function (scope, element, attrs) {
// returns an array with the range of numbers
// you can use _.range instead if you use underscore
function range(from, to, step) {
var array = [];
while (from + step <= to)
array[array.length] = from += step;
return array;
}
// prepare range options
var from = scope.from || 0;
var step = scope.step || 1;
var to = scope.to || attrs.ngRepeatRange;
// get range of numbers, convert to the string and add ng-repeat
var rangeString = range(from, to + 1, step).join(',');
angular.element(element).attr('ng-repeat', 'n in [' + rangeString + ']');
angular.element(element).removeAttr('ng-repeat-range');
$compile(element)(scope);
}
};
}]);
HTML代码是
<div ng-repeat-range from="0" to="20" step="5">
Hello 4 times!
</div>
或者简单地
<div ng-repeat-range from="5" to="10">
Hello 5 times!
</div>
或者简单地说
<div ng-repeat-range to="3">
Hello 3 times!
</div>
或者只是
<div ng-repeat-range="7">
Hello 7 times!
</div>
其他回答
方法定义
下面的代码定义了一个方法range()，可用于应用程序MyApp的整个作用域。它的行为非常类似于Python的range()方法。
angular.module('MyApp').run(['$rootScope', function($rootScope) {
$rootScope.range = function(min, max, step) {
// parameters validation for method overloading
if (max == undefined) {
max = min;
min = 0;
}
step = Math.abs(step) || 1;
if (min > max) {
step = -step;
}
// building the array
var output = [];
for (var value=min; value<max; value+=step) {
output.push(value);
}
// returning the generated array
return output;
};
}]);
使用
只有一个参数:
<span ng-repeat="i in range(3)">{{ i }}, </span>
0, 1, 2,
有两个参数:
<span ng-repeat="i in range(1, 5)">{{ i }}, </span>
One, two, three, four,
有三个参数:
<span ng-repeat="i in range(-2, .7, .5)">{{ i }}, </span>
-2, -1.5, -1, -0.5, 0, 0.5,
我想出了一个更简单的版本，用于创建两个定义的数字之间的范围，例如。5至15
参见JSFiddle上的演示
HTML:
<ul>
<li ng-repeat="n in range(5,15)">Number {{n}}</li>
</ul>
控制器:
$scope.range = function(min, max, step) {
step = step || 1;
var input = [];
for (var i = min; i <= max; i += step) {
input.push(i);
}
return input;
};
嗨，你可以使用AngularJS实现纯html(不需要指令!)
<div ng-app="myapp" ng-controller="YourCtrl" ng-init="x=[5];">
<div ng-if="i>0" ng-repeat="i in x">
<!-- this content will repeat for 5 times. -->
<table class="table table-striped">
<tr ng-repeat="person in people">
<td>{{ person.first + ' ' + person.last }}</td>
</tr>
</table>
<p ng-init="x.push(i-1)"></p>
</div>
</div>
这是最简单的变体: 只需使用整数数组....
< lig repeat= < n >测试:
在控制器中设置作用域
var range = [];
for(var i=20;i<=70;i++) {
range.push(i);
}
$scope.driverAges = range;
在“Html模板文件”中设置“重复”
<select type="text" class="form-control" name="driver_age" id="driver_age">
<option ng-repeat="age in driverAges" value="{{age}}">{{age}}</option>
</select>
