这篇文章将为大家详细讲解有关Angular如何使用输入框实现自定义验证功能，小编觉得挺实用的，因此分享给大家做个参考，希望大家阅读完这篇文章后可以有所收获。
此插件使用angular.js、JQuery实现。（jQuery的引入需在angular 之前）
用户可以 在输入框输入数据后验证 必填项、整数型、浮点型验证。
如果在form 里面的输入框验证，可以点击 提交按钮后，实现 必填项验证。
效果图如下：
(1)验证未通过时，背景标红等样式为
input.ng-invalid, select.ng-invalid {
background-color: #ee82ee !important;
border: 1px solid #CCC;
}
.qtip {
position: absolute;
max-width: 260px;
display: none;
min-width: 50px;
font-size: 10.5px;
line-height: 12px;
direction: ltr;
}
.qtip-content {
position: relative;
padding: 5px 9px;
overflow: hidden;
text-align: left;
word-wrap: break-word;
}
.qtip-rounded, .qtip-tipsy {
-moz-border-radius: 5px;
-webkit-border-radius: 5px;
border-radius: 5px;
}
.qtipmodal-ie6fix {
position: absolute !important;
}
.box-shadow-tips {
background-color: #F63;
border-color: #F5A88F;
color: white;
-moz-box-shadow: 2px 2px 2px #969696;
-webkit-box-shaow: 2px 2px 2px #969696;
box-shadow: 2px 2px 2px #969696;
}因为angular.js 内置验证未通过时，会自动为 标签 增加 .ng-invalid 样式，因为这里重写此样式
input.ng-invalid, select.ng-invalid {
background-color: #ee82ee !important;
border: 1px solid #CCC;
} （2）HTML 代码如下
<body ng-app="myApp">
<form name="baseInfoForm">
<div ng-controller="testCtrl">
<input type="text" ng-model="age" my-valid="r"><br>
<input type="text" ng-model="name" my-valid="int fn:certCheck"><br>
<input type="button" value="提交" ng-click="submit()">
</div>
</form>
</body>(3)此插件使用 directive myValid 实现
app.directive('myValid', ['$parse', 'uiTipsFactory', 'uiValidFactory', function ($parse, tips, valid) {
var uiValidAttrIdName = 'ui-valid-id';
return {
restrict: 'A',
require: 'ngModel',
link: function (scope, el, attrs, ctrl) {
var validId = el.attr(uiValidAttrIdName);
if (!validId) {
validId = Math.guid();
el.attr(uiValidAttrIdName, validId);
}
var getRules = function () {
return attrs.myValid;
};
var lastOldRules;
var validFn = function (value, oldRules) {
var sp = '_';
var rules = getRules();
var r = valid.check(value, rules, scope, attrs.uiValidTips);
if (lastOldRules && !oldRules) {
oldRules = lastOldRules;
}
if (r.flag && oldRules) {
rules = rules ? rules + ' ' + oldRules : oldRules;
}
if (rules) {
var arrInner = rules.split(' ');
var i = 0;
for (; i < arrInner.length; i++) {
var oneRule = arrInner[i];
if (!oneRule.trim()) {
continue;
}
ctrl.$setValidity(attrs.ngModel + sp + oneRule, r.flag ? true : oneRule != r.rule);
}
}
if (!r.flag) {
tips.on(el, r.msg);
} else {
tips.off(el);
}
return r.flag;
};
var init = function () {
var rules = getRules();
if (!rules) {
return;
}
var parsers = ctrl.$parsers;
if (parsers && parsers.length > 0) {
parsers.clean();
}
parsers.unshift(function (value) {
return validFn(value) ? value : undefined;
});
};
scope.$watch(attrs.ngModel, function (newVal, oldVal) {
if (newVal === oldVal) {
return;
}
if (ctrl.$modelValue != undefined && (ctrl.$invalid || el.hasClass('ng-invalid'))) {
validFn(ctrl.$modelValue);
}
});
scope.$watch(getRules, function (newRules, oldRules) {
init();
lastOldRules = oldRules;
if (ctrl.$modelValue === undefined || ctrl.$modelValue === null) {
var needValid = false;
el.hasClass('ng-invalid');
var isValNaN = ctrl.$viewValue !== ctrl.$viewValue;
if (ctrl.$invalid || (ctrl.$viewValue !== undefined && !isValNaN)) {
needValid = true;
}
if (needValid) {
ctrl.$setViewValue(ctrl.$viewValue);
}
} else {
if (!ctrl.$dirty && attrs.dirtyCheck) {
console.log('----');
} else {
validFn(ctrl.$modelValue, oldRules);
}
}
});
}
}
}]);通过 监听 attrs.ngModel，验证规则 rules ，ctrl.$parser 来实现 输入框内容改变的响应。
一旦使用此directive，则动态为当前输入框添加ID，以便在 验证通过后，改变输入框的验证背景信息。
（4）验证逻辑处理 uiValidFactory
app.factory('uiValidFactory', ['$parse', 'uiTipsFactory', function ($parse, tips) {
return {
check: function (val, rules, $scope, defaultTips, extendParam) {
if (!rules) {
return {
flag: true
};
}
var rulesArr = rules.split(' '),
isBlank = val === null || val === undefined || val === '' || ('' + val === '');
//如果不是必填项 且没有输入值 则清除提示框
if ($.inArray('r', rulesArr) === -1 && isBlank) {
return {
flag: true
}
}
var i = 0, len = rulesArr.length;
for (; i < len; i++) {
var rule = rulesArr[i];
if (!rule) {
continue;
}
var flag = true;
if ('r' === rule) {
//如果是必填项，有值 返回true
flag = !isBlank;
} else if (rule.contains(':')) {
//如果校验规则是 fn:ctrl.certCheck
flag = this.checkRule(val, rule.split(/:/), $scope, extendParam);
} else {
//校验 规则是 int 用正则匹配 数字 邮箱 长度
var pat = this.pats[rule];
if (pat instanceof RegExp) {
if (angular.isString(val)) {
flag = this.mat(val, pat);
}
} else if (angular.isFunction(pat)) {
flag = pat(val);
} else {
flag = false;
}
}
//这是干什么的呢
if (angular.isString(flag)) {
return {
flag: false,
msg: flag,
rule: rule
}
}
if (flag === false) {
var msg = this.getMsg(rule, defaultTips) || this.getMsg('tips.valid');
console.log(msg);
return {
flag: false,
msg: msg,
rule: rule
}
}
}
return {
flag: true
}
},
checkRule: function (val, ruleArr, $scope, extendParam) {
//ruleArr fn:certCheck
var rule = ruleArr[0];
if (rule === 'fn') {
fnName = ruleArr[1];//指定被调函数的名字 certCheck
var fn = $parse(fnName)($scope);
if (!fn) {
return true;
}
return fn.call($scope, val, extendParam);
} else {
return true;
}
},
checkValidForm: function (formName) {
//只检查必填项
//使用属性筛选器 获得里面所有的元素
var formContext = $('form[name="{0}"],[ng-form="{0}"],[data-ng-form="{0}"]'.format(formName)),
validList = formContext.find('[my-valid]');//validList 不是数组，是伪数组
if (!validList.length) {
return;
}
var that = this,
validFlags = [];
validList.each(function () {
var ele = $(this),
val = ele.val(),
ruleStr = ele.attr('my-valid');
if (!ruleStr) {
return true;
}
if (angular.isString(val)) {
val = val.trim();
}
var validRules = ruleStr.split(' ');
if ($.inArray('r', validRules) != -1 && !val) {
var modelValue = ele.attr('ng-model') || ele.attr('data-ng-model');
validFlags.push(modelValue);
tips.on(ele, that.getMsg('r'));
}
}
);
return validFlags;
},
mat: function (val, pat) {
if (!pat) {
return;
}
return pat.test(val);
}
,
getMsg: function (rule, tips) {
tips = tips || '';
//可以在界面上直接写 tips
if (tips && tips.contains(':')) {
return tips;
}
var msg = this.msgs[rule];
if (msg) {
var params0 = tips.contains(':') ? tips.split(/:/)[0] : '';
var params1 = '';
if (rule.startsWith('min') || rule.startsWith('max')) {
var ruleArr = rule.split(/:/);
params1 = ruleArr[ruleArr.length - 1];
}
return msg.format(params0, params1);
} else {
}
}
,
regPat: function (code, pat, msg) {
if (this.pat[code]) {
return;
}
this.pats[code] = pat;
this.msgs[code] = msg;
}
,
msgs: {
'r': '必填',
'int': '{0}必须为整数'
}
,
pats: {
'int': /^[\-\+]?([0-9]+)$/
}
}
}
])
;通过获取输入框 ele.myValid 验证规则，
1、如果是必填，则返回 标红此输入框，鼠标移上，则显示 验证信息 “必填””。
2、如果是整数、浮点型等验证，则通过 正则表达式进行验证。
3、如果是最大（max）、最小(min)，则自定义逻辑。
4、如果是 fn 验证，则根据 对应controller中函数进行验证。
5、用户点击提交按钮，则 判断是否必填项，验证不通过，对应元素背景标红。
（5） 验证不通过，提示Factory---uiTipsFactory
app.factory('uiTipsFactory', function () {
return {
filterClass: function (ele, invalid) {
if (invalid) {
//如果验证不通过
ele.removeClass('ng-valid').removeClass('ng-pristine').addClass('ng-invalid').addClass('ng-dirty');
} else {
ele.removeClass('ng-invalid').addClass('ng-valid');
}
},
on: function (ele, msg) {
var lastTip = ele.data('last-tip');
if (lastTip && lastTip === msg) {
return;
}
ele.data('last-tip', msg);
this.filterClass(ele, true);
var offset = ele.offset();
if (!offset.top && !offset.left && ele.is('hidden')) {
offset = ele.show().offset();
}
var id = ele.attr('ui-valid-id');
if (!id) {
id = Math.guid();
ele.attr('ui-valid-id', id);
}
if (id.contains('.')) {
id = id.replace(/\./g, '_');
}
var top = offset.top,
left = offset.left;
var getTips = function () {
var _tip = $('#vtip_' + id);
if (_tip.length) {
_tip.html(msg).css({
'display': 'none',
'top': top + 'px',
'left': left + ele.width() + 10 + 'px'
});
} else {
var html = '<div id="vtip_' + id + '" class="vtip qtip qtip-rounded box-shadow-tips">' +
'<div class="qtip-content">' + msg + '</div>';
$(html).css({
'display': 'none',
'position': 'absolute',
'top': top + 'px',
'left': left + ele.width() + 10 + 'px'
}).appendTo($('body'));
}
};
var bindTipsShow = function () {
getTips();
ele.unbind('mouseenter mouseleave').bind('mouseenter', function () {
var _tip = $('#vtip_' + id);
if (_tip.is(':hidden')) {
_tip.show();
}
}).bind('mouseleave', function () {
$('#vtip_' + id).hide();
});
};
bindTipsShow();
},
off: function (ele) {
ele.data('last-tip', '');
this.filterClass(ele);
var id = ele.attr('ui-valid-id');
if (!id) {
return;
}
if (id.contains('.')) {
id = id.replace(/\./g, '_');
}
$('#vtip_' + id).remove();
ele.unbind('mouseenter mouseleave');
}
}
});1、验证不通过，增加背景色，元素css处理如下
ele.removeClass('ng-valid').removeClass('ng-pristine').addClass('ng-invalid').addClass('ng-dirty');验证通过，CSS处理如下
ele.removeClass('ng-invalid').addClass('ng-valid');2、背景提示语，则是在body上增加一个div层。
(6)其他相关代码
var app = angular.module('myApp', []);
app.controller('testCtrl', ['$scope', 'uiValidFactory', function ($scope, uiValidFactory) {
$scope.certCheck = function (val) {
if (val > 32) {
return "数字太大了";
}
return true;
};
$scope.submit = function () {
if (!uiValidFactory.checkValidForm($scope.baseInfoForm.$name)) {
}
};
}]
);
Math.guid = function () {
var a = "", b = 1;
for (; b <= 32; b++) {
var c = Math.floor(Math.random() * 16).toString(16);
a += c;
if (b === 8 || b === 12 || b === 16 || b === 20) {
a += '-';
}
}
return a;
};
String.prototype.contains = String.prototype.contains || function (a) {
return this.indexOf(a) != -1;
};
String.prototype.format = String.prototype.format || function () {
var a = Array.prototype.slice.call(arguments);
return this.replace(/\{(\d+)}/g, function (c, b) {
return a[b];
})
};整个代码如下：
<!DOCTYPE html>
<html>
<head lang="en">
<meta charset="UTF-8">
<title></title>
<script src="jquery-1.11.1.js"></script>
<script src="angular.js"></script>
<style type="text/css">
input.ng-invalid, select.ng-invalid {
background-color: #ee82ee !important;
border: 1px solid #CCC;
}
.qtip {
position: absolute;
max-width: 260px;
display: none;
min-width: 50px;
font-size: 10.5px;
line-height: 12px;
direction: ltr;
}
.qtip-content {
position: relative;
padding: 5px 9px;
overflow: hidden;
text-align: left;
word-wrap: break-word;
}
.qtip-rounded, .qtip-tipsy {
-moz-border-radius: 5px;
-webkit-border-radius: 5px;
border-radius: 5px;
}
.qtipmodal-ie6fix {
position: absolute !important;
}
.box-shadow-tips {
background-color: #F63;
border-color: #F5A88F;
color: white;
-moz-box-shadow: 2px 2px 2px #969696;
-webkit-box-shaow: 2px 2px 2px #969696;
box-shadow: 2px 2px 2px #969696;
}
</style>
</head>
<body ng-app="myApp">
<form name="baseInfoForm">
<div ng-controller="testCtrl">
<input type="text" ng-model="age" my-valid="r"><br>
<input type="text" ng-model="name" my-valid="int fn:certCheck"><br>
<input type="button" value="提交" ng-click="submit()">
</div>
</form>
</body>
<script type="text/javascript">
var app = angular.module('myApp', []);
app.controller('testCtrl', ['$scope', 'uiValidFactory', function ($scope, uiValidFactory) {
$scope.certCheck = function (val) {
if (val > 32) {
return "数字太大了";
}
return true;
};
$scope.submit = function () {
if (!uiValidFactory.checkValidForm($scope.baseInfoForm.$name)) {
}
};
}]
);
Math.guid = function () {
var a = "", b = 1;
for (; b <= 32; b++) {
var c = Math.floor(Math.random() * 16).toString(16);
a += c;
if (b === 8 || b === 12 || b === 16 || b === 20) {
a += '-';
}
}
return a;
};
String.prototype.contains = String.prototype.contains || function (a) {
return this.indexOf(a) != -1;
};
String.prototype.format = String.prototype.format || function () {
var a = Array.prototype.slice.call(arguments);
return this.replace(/\{(\d+)}/g, function (c, b) {
return a[b];
})
};
app.factory('uiTipsFactory', function () {
return {
filterClass: function (ele, invalid) {
if (invalid) {
//如果验证不通过
ele.removeClass('ng-valid').removeClass('ng-pristine').addClass('ng-invalid').addClass('ng-dirty');
} else {
ele.removeClass('ng-invalid').addClass('ng-valid');
}
},
on: function (ele, msg) {
var lastTip = ele.data('last-tip');
if (lastTip && lastTip === msg) {
return;
}
ele.data('last-tip', msg);
this.filterClass(ele, true);
var offset = ele.offset();
if (!offset.top && !offset.left && ele.is('hidden')) {
offset = ele.show().offset();
}
var id = ele.attr('ui-valid-id');
if (!id) {
id = Math.guid();
ele.attr('ui-valid-id', id);
}
if (id.contains('.')) {
id = id.replace(/\./g, '_');
}
var top = offset.top,
left = offset.left;
var getTips = function () {
var _tip = $('#vtip_' + id);
if (_tip.length) {
_tip.html(msg).css({
'display': 'none',
'top': top + 'px',
'left': left + ele.width() + 10 + 'px'
});
} else {
var html = '<div id="vtip_' + id + '" class="vtip qtip qtip-rounded box-shadow-tips">' +
'<div class="qtip-content">' + msg + '</div>';
$(html).css({
'display': 'none',
'position': 'absolute',
'top': top + 'px',
'left': left + ele.width() + 10 + 'px'
}).appendTo($('body'));
}
};
var bindTipsShow = function () {
getTips();
ele.unbind('mouseenter mouseleave').bind('mouseenter', function () {
var _tip = $('#vtip_' + id);
if (_tip.is(':hidden')) {
_tip.show();
}
}).bind('mouseleave', function () {
$('#vtip_' + id).hide();
});
};
bindTipsShow();
},
off: function (ele) {
ele.data('last-tip', '');
this.filterClass(ele);
var id = ele.attr('ui-valid-id');
if (!id) {
return;
}
if (id.contains('.')) {
id = id.replace(/\./g, '_');
}
$('#vtip_' + id).remove();
ele.unbind('mouseenter mouseleave');
}
}
});
app.factory('uiValidFactory', ['$parse', 'uiTipsFactory', function ($parse, tips) {
return {
check: function (val, rules, $scope, defaultTips, extendParam) {
if (!rules) {
return {
flag: true
};
}
var rulesArr = rules.split(' '),
isBlank = val === null || val === undefined || val === '' || ('' + val === '');
//如果不是必填项 且没有输入值 则清除提示框
if ($.inArray('r', rulesArr) === -1 && isBlank) {
return {
flag: true
}
}
var i = 0, len = rulesArr.length;
for (; i < len; i++) {
var rule = rulesArr[i];
if (!rule) {
continue;
}
var flag = true;
if ('r' === rule) {
//如果是必填项，有值 返回true
flag = !isBlank;
} else if (rule.contains(':')) {
//如果校验规则是 fn:ctrl.certCheck
flag = this.checkRule(val, rule.split(/:/), $scope, extendParam);
} else {
//校验 规则是 int 用正则匹配 数字 邮箱 长度
var pat = this.pats[rule];
if (pat instanceof RegExp) {
if (angular.isString(val)) {
flag = this.mat(val, pat);
}
} else if (angular.isFunction(pat)) {
flag = pat(val);
} else {
flag = false;
}
}
//这是干什么的呢
if (angular.isString(flag)) {
return {
flag: false,
msg: flag,
rule: rule
}
}
if (flag === false) {
var msg = this.getMsg(rule, defaultTips) || this.getMsg('tips.valid');
console.log(msg);
return {
flag: false,
msg: msg,
rule: rule
}
}
}
return {
flag: true
}
},
checkRule: function (val, ruleArr, $scope, extendParam) {
//ruleArr fn:certCheck
var rule = ruleArr[0];
if (rule === 'fn') {
fnName = ruleArr[1];//指定被调函数的名字 certCheck
var fn = $parse(fnName)($scope);
if (!fn) {
return true;
}
return fn.call($scope, val, extendParam);
} else {
return true;
}
},
checkValidForm: function (formName) {
//只检查必填项
//使用属性筛选器 获得里面所有的元素
var formContext = $('form[name="{0}"],[ng-form="{0}"],[data-ng-form="{0}"]'.format(formName)),
validList = formContext.find('[my-valid]');//validList 不是数组，是伪数组
if (!validList.length) {
return;
}
var that = this,
validFlags = [];
validList.each(function () {
var ele = $(this),
val = ele.val(),
ruleStr = ele.attr('my-valid');
if (!ruleStr) {
return true;
}
if (angular.isString(val)) {
val = val.trim();
}
var validRules = ruleStr.split(' ');
if ($.inArray('r', validRules) != -1 && !val) {
var modelValue = ele.attr('ng-model') || ele.attr('data-ng-model');
validFlags.push(modelValue);
tips.on(ele, that.getMsg('r'));
}
}
);
return validFlags;
},
mat: function (val, pat) {
if (!pat) {
return;
}
return pat.test(val);
}
,
getMsg: function (rule, tips) {
tips = tips || '';
//可以在界面上直接写 tips
if (tips && tips.contains(':')) {
return tips;
}
var msg = this.msgs[rule];
if (msg) {
var params0 = tips.contains(':') ? tips.split(/:/)[0] : '';
var params1 = '';
if (rule.startsWith('min') || rule.startsWith('max')) {
var ruleArr = rule.split(/:/);
params1 = ruleArr[ruleArr.length - 1];
}
return msg.format(params0, params1);
} else {
}
}
,
regPat: function (code, pat, msg) {
if (this.pat[code]) {
return;
}
this.pats[code] = pat;
this.msgs[code] = msg;
}
,
msgs: {
'r': '必填',
'int': '{0}必须为整数'
}
,
pats: {
'int': /^[\-\+]?([0-9]+)$/
}
}
}
])
;
app.directive('myValid', ['$parse', 'uiTipsFactory', 'uiValidFactory', function ($parse, tips, valid) {
var uiValidAttrIdName = 'ui-valid-id';
return {
restrict: 'A',
require: 'ngModel',
link: function (scope, el, attrs, ctrl) {
var validId = el.attr(uiValidAttrIdName);
if (!validId) {
validId = Math.guid();
el.attr(uiValidAttrIdName, validId);
}
var getRules = function () {
return attrs.myValid;
};
var lastOldRules;
var validFn = function (value, oldRules) {
var sp = '_';
var rules = getRules();
var r = valid.check(value, rules, scope, attrs.uiValidTips);
if (lastOldRules && !oldRules) {
oldRules = lastOldRules;
}
if (r.flag && oldRules) {
rules = rules ? rules + ' ' + oldRules : oldRules;
}
if (rules) {
var arrInner = rules.split(' ');
var i = 0;
for (; i < arrInner.length; i++) {
var oneRule = arrInner[i];
if (!oneRule.trim()) {
continue;
}
ctrl.$setValidity(attrs.ngModel + sp + oneRule, r.flag ? true : oneRule != r.rule);
}
}
if (!r.flag) {
tips.on(el, r.msg);
} else {
tips.off(el);
}
return r.flag;
};
var init = function () {
var rules = getRules();
if (!rules) {
return;
}
var parsers = ctrl.$parsers;
if (parsers && parsers.length > 0) {
parsers.clean();
}
parsers.unshift(function (value) {
return validFn(value) ? value : undefined;
});
};
scope.$watch(attrs.ngModel, function (newVal, oldVal) {
if (newVal === oldVal) {
return;
}
if (ctrl.$modelValue != undefined && (ctrl.$invalid || el.hasClass('ng-invalid'))) {
validFn(ctrl.$modelValue);
}
});
scope.$watch(getRules, function (newRules, oldRules) {
init();
lastOldRules = oldRules;
if (ctrl.$modelValue === undefined || ctrl.$modelValue === null) {
var needValid = false;
el.hasClass('ng-invalid');
var isValNaN = ctrl.$viewValue !== ctrl.$viewValue;
if (ctrl.$invalid || (ctrl.$viewValue !== undefined && !isValNaN)) {
needValid = true;
}
if (needValid) {
ctrl.$setViewValue(ctrl.$viewValue);
}
} else {
if (!ctrl.$dirty && attrs.dirtyCheck) {
console.log('----');
} else {
validFn(ctrl.$modelValue, oldRules);
}
}
});
}
}
}]);
</script>
</html>关于“Angular如何使用输入框实现自定义验证功能”这篇文章就分享到这里了，希望以上内容可以对大家有一定的帮助，使各位可以学到更多知识，如果觉得文章不错，请把它分享出去让更多的人看到。
