一般来讲表单可能遇到的问题：
1.如何数据绑定。
2.验证表单。
3.显示出错信息。
4.整个form的验证。
5.避免提交没有验证通过的表单。
6.防止多系提交。

input属性：
name
ng-model
ng-required
ng-minlength
ng-maxlength
ng-pattern
ng-change值变化时的回调

{{myForm.username.$error}}

Form控制变量
字段是否未更改
formName.inputFieldName.$pristine
字段是否更改
formName.inputFieldName.$dirty
字段有效
formName.inputFieldName.$valid
字段无效
formName.inputFieldName.$invalid
字段错误信息
formName.inputfieldName.$error

 一个简单的表格的输入框的判断

angular的 表单_html

 

 

<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <link rel="stylesheet" href="../../vendor/bootstrap3/css/bootstrap.min.css"/>
</head>
<body>
<div ng-app="myApp" style="margin-top: 100px;">

    <form name="myForm" action="kittencup.php" ng-controller="firstController" class="container form-horizontal">
        <div class="form-group" ng-class="{'has-error':myForm.username.$dirty && myForm.username.$invalid}">
            <label class="col-sm-2 control-label">用户名</label>
            <div class="col-sm-10">
                <input type="text" autocomplete="off" name="username" ng-pattern="/^[a-zA-Z]{1}/" ng-required="true" ng-minlength="5" ng-maxlength="10" ng-model="data.username" class="form-control" placeholder="用户名">
                <div ng-show="myForm.username.$dirty && myForm.username.$error.maxlength" class="alert alert-danger help-block">
                    用户名长度不能超过10位
                </div>
                <div ng-show="myForm.username.$dirty && myForm.username.$error.minlength" class="alert alert-danger help-block">
                    用户名长度不能小于5位
                </div>
                <div ng-show="myForm.username.$dirty && myForm.username.$error.pattern" class="alert alert-danger help-block">
                    用户名必须已英文字母开始
                </div>
            </div>
        </div>

        <div class="form-group" ng-class="{'has-error':myForm.password.$dirty && myForm.password.$invalid}">
            <label class="col-sm-2 control-label">密 码</label>
            <div class="col-sm-10">
                <input type="password" autocomplete="off" name="password" ng-required="true" ng-minlength="5" ng-maxlength="10" ng-model="data.password" class="form-control" placeholder="密码">
                <div ng-show="myForm.password.$dirty && myForm.password.$error.maxlength" class="alert alert-danger help-block">
                    密码长度不能超过10位
                </div>
                <div ng-show="myForm.password.$dirty && myForm.password.$error.minlength" class="alert alert-danger help-block">
                    密码长度不能小于5位
                </div>
            </div>
        </div>

        <div class="form-group" ng-class="{'has-error':myForm.passwordConfirm.$dirty && myForm.passwordConfirm.$invalid}">
            <label class="col-sm-2 control-label">确认密码</label>
            <div class="col-sm-10">
                <input type="password" autocomplete="off" name="passwordConfirm" ng-required="true" ng-model="data.passwordConfirm" class="form-control" placeholder="确认密码">
                <div ng-show="myForm.password.$dirty && myForm.passwordConfirm.$dirty && data.password !== data.passwordConfirm" class="alert alert-danger help-block">
                    密码和确认密码不一致
                </div>
            </div>
        </div>

        <div class="form-group" ng-class="{'has-error':myForm.email.$dirty && myForm.email.$invalid}">
            <label class="col-sm-2 control-label">邮箱</label>
            <div class="col-sm-10">
                <input type="email" autocomplete="off" name="email" ng-required="true" ng-minlength="5" ng-maxlength="30" ng-model="data.email" class="form-control" placeholder="邮箱">
                <div ng-show="myForm.email.$dirty && myForm.email.$error.maxlength" class="alert alert-danger help-block">
                    邮箱长度不能超过30位
                </div>
                <div ng-show="myForm.email.$dirty && myForm.email.$error.minlength" class="alert alert-danger help-block">
                    邮箱长度不能小于5位
                </div>
                <div ng-show="myForm.email.$dirty && myForm.email.$error.email" class="alert alert-danger help-block">
                    邮箱格式不正确
                </div>
            </div>
        </div>

        <div class="form-group" ng-class="{'has-error':myForm.blog.$dirty && myForm.blog.$invalid}">
            <label class="col-sm-2 control-label">博客网址</label>
            <div class="col-sm-10">
                <input type="url" autocomplete="off" name="blog" ng-required="true" ng-minlength="5" ng-maxlength="30" ng-model="data.blog" class="form-control" placeholder="博客网址">
                <div ng-show="myForm.blog.$dirty && myForm.blog.$error.maxlength" class="alert alert-danger help-block">
                    网址长度不能超过30位
                </div>
                <div ng-show="myForm.blog.$dirty && myForm.blog.$error.minlength" class="alert alert-danger help-block">
                    网址长度不能小于5位
                </div>
                <div ng-show="myForm.blog.$dirty && myForm.blog.$error.url" class="alert alert-danger help-block">
                    网址格式不正确
                </div>
            </div>
        </div>

        <div class="form-group" ng-class="{'has-error':myForm.age.$dirty && myForm.age.$invalid}">
            <label class="col-sm-2 control-label">年龄</label>
            <div class="col-sm-10">
                <input type="number" autocomplete="off" name="age" min="10" max="99" ng-required="true" ng-model="data.age" class="form-control" placeholder="年龄">
                <div ng-show="myForm.age.$dirty && myForm.age.$error.max" class="alert alert-danger help-block">
                    年龄不能超过99岁
                </div>
                <div ng-show="myForm.age.$dirty && myForm.age.$error.min" class="alert alert-danger help-block">
                    年龄不能小于10岁
                </div>
            </div>
        </div>

        <div class="form-group">
            <label class="col-sm-2 control-label">性别</label>
            <div class="col-sm-10">
                <label class="radio-inline">
                    <input type="radio" ng-required="true" name="sex" ng-model="data.sex" value="1" /> 男
                </label>
                <label class="radio-inline">
                    <input type="radio" ng-required="true" name="sex" ng-model="data.sex" value="0" /> 女
                </label>
            </div>
        </div>

        <div class="form-group">
            <label class="col-sm-2 control-label">爱好</label>
            <div class="col-sm-10">
                <label class="checkbox-inline" ng-repeat="hobby in hobbies">
                    <input type="checkbox" ng-model="hobby.checked" name="hobby[]" ng-checked="data.hobbies === undefined ? false : data.hobbies.indexOf(hobby.id) !== -1" ng-click="toggleHobbySelection(hobby.id)"/> {{hobby.name}}
                </label>
            </div>
        </div>

        <div class="form-group">
            <label class="col-sm-2 control-label">出生地</label>
            <div class="col-sm-3">
                <select class="form-control" ng-change="data.area = false" ng-model="data.province" ng-options="x.id as x.name for x in cities | cityFilter:0"></select>
            </div>
            <div class="col-sm-3">
                <select class="form-control" ng-show="data.province" ng-model="data.area" ng-options="x.id as x.name for x in cities | cityFilter:data.province"></select>
            </div>
            <div class="col-sm-3">
                <select class="form-control" ng-required="true" ng-show="data.province && data.area" ng-model="data.city" ng-options="x.id as x.name for x in cities | cityFilter:data.area"></select>
            </div>
        </div>

        <div class="form-group">
            <label class="col-sm-2 control-label">只能输入偶数</label>
            <div class="col-sm-10">
               <input type="text" name="even" class="form-group" placeholder="偶数" ng-model="data.even" even>
                <div ng-show="myForm.even.$error.even" class="alert alert-danger help-block">
                    数字必须是偶数
                </div>
            </div>
        </div>

        <div class="form-group">
            <label class="col-sm-2 control-label">个人介绍</label>
            <div class="col-sm-10">
                <custom-text-area ng-model="data.introduct">aaa</custom-text-area>
                <custom-text-area ng-model="data.introduct"></custom-text-area>
            </div>
        </div>

        <div class="form-group">
           <div class="col-sm-offset-2 col-sm-10">
               <button type="submit" class="btn btn-default" ng-disabled="myForm.$invalid || data.hobbies === undefined || data.hobbies.length === 0">注册</button>
               <button type="reset" class="btn btn-default" ng-click="reset()">重置</button>
           </div>

        </div>


    </form>

</div>


<script type="text/javascript" src="../../vendor/angular/angularjs.js"></script>
<script type="text/javascript" src="app/index.js"></script>


</body>
</html>
angular.module('myApp', [])

    .filter('cityFilter', function () {
        return function (data, parent) {
            var filterData = [];
            angular.forEach(data, function (obj) {
                if (obj.parent === parent) {
                    filterData.push(obj);
                }
            })

            return filterData;
        }
    })

    .directive('even',function(){
        return {
            require : 'ngModel',
            link:function(scope,elm,attrs,ngModelController){
                ngModelController.$parsers.push(function(viewValue){
                    if(viewValue % 2 === 0){
                        ngModelController.$setValidity('even',true);
                    }else{
                        ngModelController.$setValidity('even',false);
                    }
                    return viewValue;
                });

//                ngModelController.$formatters.push(function(modelValue){
//                    return modelValue + 'kittencup';
//                })
            }
        };
    })

    .directive('customTextArea',function(){
        return {
            restrict:'E',
            template:'<div contenteditable="true"></div>',
            replace:true,
            require : 'ngModel',
            link:function(scope,elm,attrs,ngModelController){


                // view->model
                elm.on('keyup',function(){
                    scope.$apply(function(){
                        ngModelController.$setViewValue(elm.html());
                    });
                })

                ngModelController.$render = function(){
                    elm.html(ngModelController.$viewValue);
                }

            }
        };
    })


    .controller('firstController', ['$scope', function ($scope) {

        var that = this;

        $scope.hobbies = [
            {
                id: 1,
                name: '玩游戏'
            },
            {
                id: 2,
                name: '写代码'
            },
            {
                id: 3,
                name: '睡觉'
            },
        ];

        $scope.cities = [
            {
                name: '上海',
                parent: 0,
                id: 1
            },
            {
                name: '上海市',
                parent: 1,
                id: 2
            },
            {
                name: '徐汇区',
                parent: 2,
                id: 8
            },
            {
                name: '长宁区',
                parent: 2,
                id: 3
            },
            {
                name: '北京',
                parent: 0,
                id: 4
            },
            {
                name: '北京市',
                parent: 4,
                id: 5
            },
            {
                name: '东城区',
                parent: 5,
                id: 6
            },
            {
                name: '丰台区',
                parent: 5,
                id: 7
            },
            {
                name: '浙江',
                parent: 0,
                id: 9
            },
            {
                name: '杭州',
                parent: 9,
                id: 100
            },
            {
                name: '宁波',
                parent: 9,
                id: 11
            },
            {
                name: '西湖区',
                parent: 100,
                id: 12
            },
            {
                name: '北仑区‎',
                parent: 11,
                id: 13
            }
        ];


        $scope.data = {
            hobbies: [1, 2],
            city: 3
        };


        // 先保留一份默认值
        $scope.origData = angular.copy($scope.data);

        $scope.reset = function(){

            $scope.data = angular.copy($scope.origData);
            that.initCity();
            $scope.myForm.$setPristine();
        }

        // 让城市关联使用
        this.findCityId = function (parent) {
            var parentId;
            angular.forEach($scope.cities, function (city) {
                if (city.id === parent) {
                    parentId = city.parent;
                    return;
                }
            })

            return parentId;
        }

        this.initCity = function(){
            if ($scope.data.city !== undefined) {
                $scope.data.area = this.findCityId($scope.data.city);
                $scope.data.province = this.findCityId($scope.data.area);
            }
        }

        // 第一次打开页面 需要初始化一下
        this.initCity.call(this);

        $scope.toggleHobbySelection = function (id) {

            var index = -1;
            if ($scope.data.hobbies === undefined) {
                $scope.data.hobbies = [];
            } else {
                index = $scope.data.hobbies.indexOf(id);
            }

            if (index === -1) {
                $scope.data.hobbies.push(id);
            } else {
                $scope.data.hobbies.splice(index, 1);
            }

        }
    }]);

===========================================

myForm.username.$dirty  如果表单有更改则为true，如果没有更改则为false。

myForm.username.$error.maxlength 如果超出则为true，如果没有超出则为false。

ng-class="{'has-error':myForm.password.$dirty && myForm.password.$invalid}" 这句的意思是为了可以让写错后，边框变红。

autocomplete="off"  关闭自动提示的功能

ng-options="x.id as x.name for x in cities | cityFilter:0" 看链接：http://each.sinaapp.com/angular/tutorial/ng-options.html

ng-model 是angular原生的directive
可以通过require ngModel可以更深入的去处理数据的双向绑定。
ngModel里的属性

$parsers属性，保存了从viewValue向modelValue绑定过程中的处理函数，它们将来会依次执行。
$formatters它保存的是从modelValue向viewValue绑定过程中的处理函数
$setViewValue 当view发生了某件事情时，从view向model绑定调用
$setViewValue
$render
$setValidity
$viewValue
$modelValue

 当reset的按钮同时又click事件时，先执行本身的reset然后执行click事件。

angular的 表单_用户名_02

注意表单中这几个位置的写法，ng-model必须是$scope中给出的，不能写user.