Javascript 如何使用bootstrap将ng repeat数据拆分为三列
我在代码中使用ng repeat,基于ng repeat,我有n个文本框。我想将文本框与三列对齐 这是我的密码Javascript 如何使用bootstrap将ng repeat数据拆分为三列,javascript,angularjs,angularjs-ng-repeat,Javascript,Angularjs,Angularjs Ng Repeat,我在代码中使用ng repeat,基于ng repeat,我有n个文本框。我想将文本框与三列对齐 这是我的密码 <div class="control-group" ng-repeat="oneExt in configAddr.ext"> {{$index+1}}. <input type="text" name="macAdr{{$index+1}}" id="macAddress" ng-model="oneExt.newValu
<div class="control-group" ng-repeat="oneExt in configAddr.ext">
{{$index+1}}.
<input type="text" name="macAdr{{$index+1}}"
id="macAddress" ng-model="oneExt.newValue" value=""/>
</div>
{{$index+1}}。
最可靠、技术上最正确的方法是转换控制器中的数据。下面是一个简单的块函数和用法
function chunk(arr, size) {
var newArr = [];
for (var i=0; i<arr.length; i+=size) {
newArr.push(arr.slice(i, i+size));
}
return newArr;
}
$scope.chunkedData = chunk(myData, 3);
许多人更喜欢在视图中使用过滤器来实现这一点。这是可能的,但应仅用于显示目的!如果在该过滤视图中添加输入,将导致可以解决,但不美观或不可靠的问题
此筛选器的问题是每次都返回新的嵌套数组。Angular正在监视过滤器的返回值。第一次运行过滤器时,Angular知道该值,然后再次运行以确保完成更改。如果两个值相同,则循环结束。如果没有,过滤器将一次又一次地启动,直到它们相同,或者出现无限摘要循环并关闭。因为Angular以前没有跟踪新的嵌套数组/对象,所以它总是将返回值视为与以前的不同。要修复这些“不稳定”过滤器,必须将过滤器包装在memoize
函数中lodash
有一个memoize
功能,最新版本的lodash还包括一个chunk
功能,因此我们可以非常简单地使用npm
模块创建此过滤器,并使用browserify
或webpack
编译脚本
记住:仅显示!如果使用输入,则在控制器中进行过滤
安装lodash:
npm install lodash-node
创建过滤器:
var chunk = require('lodash-node/modern/array/chunk');
var memoize = require('lodash-node/modern/function/memoize');
angular.module('myModule', [])
.filter('chunk', function() {
return memoize(chunk);
});
下面是使用此过滤器的示例:
<div ng-repeat="row in ['a','b','c','d','e','f'] | chunk:3">
<div class="column" ng-repeat="item in row">
{{($parent.$index*row.length)+$index+1}}. {{item}}
</div>
</div>
关于垂直列(从上到下列出),而不是水平列(从左到右),具体实现取决于所需的语义。划分不均匀的列表可以以不同的方式分布。这里有一个方法:
<div ng-repeat="row in columns">
<div class="column" ng-repeat="item in row">
{{item}}
</div>
</div>
{{item}}
我有一个函数并将其存储在服务中,这样我就可以在我的应用程序中使用它:
服务:
app.service('SplitArrayService', function () {
return {
SplitArray: function (array, columns) {
if (array.length <= columns) {
return [array];
};
var rowsNum = Math.ceil(array.length / columns);
var rowsArray = new Array(rowsNum);
for (var i = 0; i < rowsNum; i++) {
var columnsArray = new Array(columns);
for (j = 0; j < columns; j++) {
var index = i * columns + j;
if (index < array.length) {
columnsArray[j] = array[index];
} else {
break;
}
}
rowsArray[i] = columnsArray;
}
return rowsArray;
}
}
$scope.rows = SplitArrayService.SplitArray($scope.images, 3); //im splitting an array of images into 3 columns
<div class="col-sm-12" ng-repeat="row in imageRows">
<div class="col-sm-4" ng-repeat="image in row">
<img class="img-responsive" ng-src="{{image.src}}">
</div>
</div>
[{id:"1",name:"testA"},{id:"2",name:"test B"},{id:"3",name:"test C"},{id:"4",name:"test D"},{id:"5",name:"test E"}]
<div ng-controller="MyCtrl">
<table>
<tr ng-repeat="item in items" ng-switch on="$index % 3">
<td ng-switch-when="0">
{{items[$index].id}} {{items[$index].name}}
</td>
<td ng-switch-when="0">
<span ng-show="items[$index+1]">
{{items[$index+1].id}} {{items[$index+1].name}}
</span>
</td>
<td ng-switch-when="0">
<span ng-show="items[$index+2]">
{{items[$index+2].id}} {{items[$index+2].name}}
</span>
</td>
</tr>
</table>
</div>
标记:
app.service('SplitArrayService', function () {
return {
SplitArray: function (array, columns) {
if (array.length <= columns) {
return [array];
};
var rowsNum = Math.ceil(array.length / columns);
var rowsArray = new Array(rowsNum);
for (var i = 0; i < rowsNum; i++) {
var columnsArray = new Array(columns);
for (j = 0; j < columns; j++) {
var index = i * columns + j;
if (index < array.length) {
columnsArray[j] = array[index];
} else {
break;
}
}
rowsArray[i] = columnsArray;
}
return rowsArray;
}
}
$scope.rows = SplitArrayService.SplitArray($scope.images, 3); //im splitting an array of images into 3 columns
<div class="col-sm-12" ng-repeat="row in imageRows">
<div class="col-sm-4" ng-repeat="image in row">
<img class="img-responsive" ng-src="{{image.src}}">
</div>
</div>
[{id:"1",name:"testA"},{id:"2",name:"test B"},{id:"3",name:"test C"},{id:"4",name:"test D"},{id:"5",name:"test E"}]
<div ng-controller="MyCtrl">
<table>
<tr ng-repeat="item in items" ng-switch on="$index % 3">
<td ng-switch-when="0">
{{items[$index].id}} {{items[$index].name}}
</td>
<td ng-switch-when="0">
<span ng-show="items[$index+1]">
{{items[$index+1].id}} {{items[$index+1].name}}
</span>
</td>
<td ng-switch-when="0">
<span ng-show="items[$index+2]">
{{items[$index+2].id}} {{items[$index+2].name}}
</span>
</td>
</tr>
</table>
</div>
基于m59非常好的答案。我发现,如果模型输入发生更改,它们将变得模糊,因此一次只能更改一个字符。这是一个新的对象列表,适用于任何需要它的人: 编辑更新以在一个页面上处理多个过滤器
app.filter('partition',function(){
var cache={};//保存差异重复作用域的旧数组
var filter=函数(newArr、大小、范围){
var i,
oldLength=0,
newLength=0,
arr=[],
id=范围。$id,
currentArr=缓存[id];
如果(!newArr)返回;
if(currentArr){
对于(i=0;i
这就是用法:
<div ng-repeat="row in items | partition:3:this">
<span class="span4">
{{ $index }}
</span>
</div>
{{$index}}
m59的答案非常好。我不喜欢它的一点是,它使用div
s表示可能是表数据的内容
因此,结合m59的过滤器(答案在上面的某个地方),下面是如何在表中显示它
<table>
<tr class="" ng-repeat="rows in foos | chunk:2">
<td ng-repeat="item in rows">{{item}}</td>
</tr>
</table>
{{item}}
一个干净、适应性强的解决方案,它不需要数据操作:
HTML:
<div class="control-group" class="label"
ng-repeat="oneExt in configAddr.ext"
ng-class="{'new-row': startNewRow($index, columnBreak) }">
{{$index+1}}.
<input type="text" name="macAdr{{$index+1}}"
id="macAddress{{$index}}" ng-model="oneExt.newValue" />
</div>
JavaScript:
$scope.columnBreak = 3; //Max number of colunms
$scope.startNewRow = function (index, count) {
return ((index) % count) === 0;
};
这是一个简单的解决方案,用于动态地将数据呈现为行和列,而无需操作您试图显示的数据数组。另外,如果您尝试调整浏览器窗口的大小,您可以看到网格动态地适应屏幕/div的大小
(我还为您的id添加了一个{$index}}后缀,因为如果您不这样做,ng repeat将尝试创建具有相同id的多个元素。)
以下是一种更简单的方法:
<table>
<tr ng-repeat="item in lists" ng-hide="$index%2!==0">
<td>
<label>{{ lists[$index].name}}</label>
</td>
<td ng-hide="!lists[$index+1]">
<label>{{ lists[$index+1].name}}</label>
</td>
</tr>
</table>
{{lists[$index].name}
{{lists[$index+1].name}
Cumulo Nimbus的答案对我很有用,但我希望这个网格用div包装,当列表太长时可以显示滚动条
为了实现这一点,我在表格周围的一个div中添加了style=“height:200px;overflow:auto”
,使其显示为一列
现在适用于1的数组长度。我是bootstrap和angularjs的新手,但这也可以将每4个项目的数组作为一个组,结果几乎像3列。 这个技巧使用自举断线原理
<div class="row">
<div class="col-sm-4" data-ng-repeat="item in items">
<div class="some-special-class">
{{item.XX}}
</div>
</div>
</div>
{{item.XX}
设置另一种方式宽度:33.33%;float:left
到包装器div,如下所示:
<div class="row" ng-repeat="rows in chunkedData">
<div class="span4" ng-repeat="item in rows">{{item}}</div>
</div>
<div ng-repeat="right in rights" style="width: 33.33%;float: left;">
<span style="width:60px;display:inline-block;text-align:right">{{$index}}</span>
<input type="number" style="width:50px;display:inline-block" ">
</div>
{{$index}}
我的方法是多种多样的
我的目标是使网格适应屏幕大小。我想要3列用于lg
,2列用于sm
和md
,1列用于xs
首先,我使用angular$window
服务创建了以下范围函数:
$scope.findColNumberPerRow=function(){
var-nCols;
变量宽度=$window.innerWidth;
如果(宽度<768){
//xs
nCols=1;
}
否则如果(宽度>=768&&width<1200){
//sm和md
nCols=2
}否则,如果(宽度>=1200){
//lg
nCols=3;
}
返回NCOL;
};
然后,我使用了@Cumulo Nimbus提出的类:
。新行{
清除:左;
}
在包含ng repeat
的div中,我添加了可调整大小的direc
$scope.groupedUsers = _.chunk( $scope.users, 3 )
<div class="row" ng-repeat="rows in groupedUsers">
<div class="span4" ng-repeat="item in rows">{{item}}</div>
</div>
<div class="row" ng-repeat="GroupAccess in UsersController.SelectedUser.Access" ng-class="{even: $even, odd: $odd}">
<div class="col-md-12 col-xs-12" style=" padding-left:15px;">
<label style="margin-bottom:2px;"><input type="checkbox" ng-model="GroupAccess.isset" />{{GroupAccess.groupname}}</label>
</div>
<div class="row" style=" padding-left:15px;">
<div class="col-md-1 col-xs-0"></div>
<div class="col-md-3 col-xs-2">
<div style="line-height:11px; margin-left:2px; margin-bottom:2px;" ng-repeat="Feature in GroupAccess.features.slice(0, state.DivideBy2(GroupAccess.features.length))">
<span class="GrpFeature">{{Feature.featurename}}</span>
</div>
</div>
<div class="col-md-3 col-xs-2">
<div style="line-height:11px; margin-left:2px; margin-bottom:2px;" ng-repeat="Feature in GroupAccess.features.slice( state.DivideBy2(GroupAccess.features.length), GroupAccess.features.length )">
<span class="GrpFeature">{{Feature.featurename}}</span>
</div>
</div>
<div class="col-md-5 col-xs-8">
</div>
</div>
</div>
// called to format two columns
state.DivideBy2 = function(nValue) {
return Math.ceil(nValue /2);
};
<div class="col col-33 left" ng-repeat="photo in photos">
Content here...
</div>
.left {
float: left;
}
[{id:"1",name:"testA"},{id:"2",name:"test B"},{id:"3",name:"test C"},{id:"4",name:"test D"},{id:"5",name:"test E"}]
<div ng-controller="MyCtrl">
<table>
<tr ng-repeat="item in items" ng-switch on="$index % 3">
<td ng-switch-when="0">
{{items[$index].id}} {{items[$index].name}}
</td>
<td ng-switch-when="0">
<span ng-show="items[$index+1]">
{{items[$index+1].id}} {{items[$index+1].name}}
</span>
</td>
<td ng-switch-when="0">
<span ng-show="items[$index+2]">
{{items[$index+2].id}} {{items[$index+2].name}}
</span>
</td>
</tr>
</table>
</div>
function GetStaffForFloor(floor) {
var promiseGet = Directory_Service.getAllStaff(floor);
promiseGet.then(function (pl) {
$scope.staffList = chunk(pl.data, 3); //pl.data; //
},
function (errorOD) {
$log.error('Errored while getting staff list.', errorOD);
});
}
function chunk(array, columns) {
var numberOfRows = Math.ceil(array.length / columns);
//puts 1, 2, 3 into column
var newRow = []; //array is row-based.
for (var i = 0; i < array.length; i++) {
var columnData = new Array(columns);
if (i == numberOfRows) break;
for (j = 0; j < columns; j++)
{
columnData[j] = array[i + numberOfRows * j];
}
newRow.push(columnData);
}
return newRow;
////this works but 1, 2, 3 is in row
//var newRow = [];
//for (var i = 0; i < array.length; i += columns) {
// newRow.push(array.slice(i, i + columns)); //push effectively does the pivot. array is row-based.
//}
//return newRow;
};
<div class="staffContainer">
<div class="row" ng-repeat="staff in staffList">
<div class="col-md-4" ng-repeat="item in staff">{{item.FullName.length > 0 ? item.FullName + ": Rm " + item.RoomNumber : ""}}</div>
</div>
</div>
<div class="row">
<div class="col-md-4" ng-repeat="remainder in [0,1,2]">
<ul>
<li ng-repeat="item in items" ng-if="$index % 3 == remainder">{{item}}</li>
</ul>
</div>
</div>
<div ng-controller="myController">
<div class="row">
<div class="col-sm-4">
<div class="well">
<div ng-repeat="person in people = data | limitTo:Math.ceil(data.length/3)">
{{ person.name }}
</div>
</div>
</div>
<div class="col-sm-4">
<div class="well">
<div ng-repeat="person in people = data | limitTo:Math.ceil(data.length/3):Math.ceil(data.length/3)">
{{ person.name }}
</div>
</div>
</div>
<div class="col-sm-4">
<div class="well">
<div ng-repeat="person in people = data | limitTo:Math.ceil(data.length/3):Math.ceil(data.length/3)*2">
{{ person.name }}
</div>
</div>
</div>
</div>
</div>
var app = angular.module('myApp', []);
app.controller('myController', function($scope) {
$scope.Math = Math;
$scope.data = [
{"name":"Person A"},
...
];
});
<div class="col-md-12">
<div class="control-group" ng-repeat="oneExt in configAddr.ext">
<div class="col-md-4">
<input type="text" name="macAdr{{$index}}"
id="macAddress" ng-model="oneExt.newValue" value="" />
</div>
</div>
</div>
<div ng-repeat="items in quotes" ng-if="!($index % 3)">
<div ng-repeat="quote in quotes" ng-if="$index <= $parent.$index + 2 && $index >= $parent.$index">
... some content ...
</div>
</div>
<div class="row">
<div ng-repeat="oneExt in configAddr.ext">
<div class="col-xs-12 col-sm-6 col-md-4 col-lg-4">
{$index+1}}.
<input type="text" name="macAdr{{$index+1}}"
id="macAddress" ng-model="oneExt.newValue" value=""/>
</div>
</div>