ngtags是angular生态下一个标签组插件，功能很强大，支持自动完成（Autocomplete），使用也非常的方便。

下载地址：https://github.com/mbenford/ngTagsInput

API地址：http://mbenford.github.io/ngTagsInput/documentation/api

在线演示：http://mbenford.github.io/ngTagsInput/demos

使用方法：

一、引入ngTags资源

<link rel="stylesheet" href="js/vendor/angular/ng-tags-input/ng-tags-input.css" type="text/css" >
  <link rel="stylesheet" href="js/vendor/angular/ng-tags-input/ng-tags-input.bootstrap.css" type="text/css" >

  <script type="text/javascript" src="js/vendor/angular/ng-tags-input/ng-tags-input.js"></script>

二、js代码

.......

app.controller('TagsController',['$scope',function($scope){
	$scope.initTags = [{text:"tag1"},{text:"中文tag"}];
	$scope.srcTags = ["srcTag1","srcTag2"];
	$scope.autoTags = [{text:"aTag1"},{text:"aTag2"},{text:"bTag1"},{text:"bTag2"},{text:"中文标签1"},{text:"中文标签2"}];
	
	$scope.tagAdded = function(tag) {
		console.log('Added: ' + tag.text);
	};
	$scope.tagRemoved = function(tag) {
		if($scope.srcTags.indexOf(tag.text)<0)$scope.srcTags.push(tag.text);
		console.log('Removed: ' + tag.text);
	};
	$scope.pushTag = function(txt){
		$scope.initTags.push({text: txt});
		$scope.srcTags.splice($scope.srcTags.indexOf(txt),1);
	}

	$scope.loadTags = function($query) {
		console.log($query);
		return $scope.autoTags.filter(function(tg) {
			return tg.text.toLowerCase().indexOf($query.toLowerCase()) != -1;
		});
	};
	$scope.submitForm = function(){
		alert(angular.toJson($scope.initTags));
		console.log($scope.initTags);
	}
}])

三、HTML代码

<script type="text/ng-template" id="auto-template">
    <span ng-bind-html="$highlight($getDisplayText())"></span>
</script>
<div class="bg-light lter b-b wrapper-md">
    <h1 class="m-n font-thin h3">标签</h1>
</div>
<div class="wrapper-md" ng-controller="TagsController">
    <div class="row">
        <div class="col-lg-12">
            <div class="panel panel-default">
                <div class="panel-body">
                    <form name="formValidate" ng-submit="submitForm()" class="form-horizontal form-validation">
                        <div class="form-group">
                            <label class="col-sm-4 control-label">Tab/Enter键完成输入,最多3个,每个最大5字符,最小1字符:<br>
                                <span class="text-muted">使用max-length,min-length配置,删除或添加时都会有监听方法,通过开发者工具可查看</span>
                            </label>
                            <div class="col-sm-4">
                                <tags-input max-tags="3" replace-spaces-with-dashes="false" display-property="text" on-tag-added="tagAdded($tag)" on-tag-removed="tagRemoved($tag)" max-length="5" min-length="1" ng-model="initTags">
                                    <auto-complete source="loadTags($query)"
                                                   min-length="0"
                                                   load-on-focus="true"
                                                   load-on-empty="true"
                                                   max-results-to-show="32"
                                                   template="auto-template">
                                    </auto-complete>
                                </tags-input>
                            </div>
                            <div class="col-sm-4">
                                历史和预定义标签：<br>
                                <div class="label bg-primary pos-rlt m-r inline wrapper-xs" ng-click="pushTag(st)" ng-repeat="st in srcTags">
                                    <i class="arrow right arrow-primary"></i>{{st}}
                                </div>
                            </div>
                        </div>
                        <footer class="panel-footer text-center">
                            <button type="submit" class="btn btn-info">提交标签</button>
                        </footer>
                    </form>
                </div>
            </div>
        </div>
    </div>
</div>

四、效果