?
AngularJS Form 进阶：远程校验和自定义输入项
?
大漠穷秋
?
本节修订了官方提供的2个例子（因为官方的例子特么有Bug！）。实例一用来示范如何用地道的Angular代码进行远程表单校验；实例二示范如何自定义表单中的输入项。
?
表单远程校验
?
HTML代码：
?
<!doctype html>
<html ng-app="form-example1">
<head>
<meta http-equiv="content-type" content="text/html; charset=utf-8" />
<link href="../bootstrap/css/bootstrap.min.css" rel="stylesheet" media="screen">
<script src="../angular-1.0.3/angular.js"></script>
<script src="FormValidation.js"></script>
</head>
<body>
<div>
<form name="myForm" class="css-form" novalidate>
<div>
整数(0-10):
<input type="number" ng-model="size" name="size" min="0" max="10" integer/>
{{size}}
<br/>
<span ng-show="myForm.size.$error.integer">不是合法的整数！</span>
<span ng-show="myForm.size.$error.min || myForm.size.$error.max">
数值必须位于0到10之间！
</span>
</div>
<div>
浮点数:
<input type="text" ng-model="length" name="length" smart-float />
{{length}}
<br/>
<span ng-show="myForm.length.$error.float">不是合法的浮点数！</span>
</div>
<div>
远程校验:
<input type="text" ng-model="remote" name="remote" remote-validation />
{{remote}}
<br/>
<span ng-show="myForm.remote.$error.remote">非法数据！</span>
</div>
</form>
</div>
</body>
</html>
?
JS代码：
?
var app = angular.module('form-example1', []);
var INTEGER_REGEXP = /^\-?\d*$/;
app.directive('integer', function() {
return {
require : 'ngModel',
link : function(scope, elm, attrs, ctrl) {
ctrl.$parsers.unshift(function(viewValue) {
if (INTEGER_REGEXP.test(viewValue)) {
ctrl.$setValidity('integer', true);
return viewValue;
} else {
ctrl.$setValidity('integer', false);
return undefined;
}
});
}
};
});
var FLOAT_REGEXP = /^\-?\d+((\.|\,)\d+)?$/;
app.directive('smartFloat', function() {
return {
require : 'ngModel',
link : function(scope, elm, attrs, ctrl) {
ctrl.$parsers.unshift(function(viewValue) {
if (FLOAT_REGEXP.test(viewValue)) {
ctrl.$setValidity('float', true);
return parseFloat(viewValue.replace(',','.'));
} else {
ctrl.$setValidity('float', false);
return undefined;
}
});
}
};
});
app.directive('remoteValidation', function($http) {
return {
require : 'ngModel',
link : function(scope, elm, attrs, ctrl) {
elm.bind('keyup', function() {
$http({method: 'GET', url: 'FormValidation.jsp'}).
success(function(data, status, headers, config) {
if(parseInt(data)==0){
ctrl.$setValidity('remote',true);
}else{
ctrl.$setValidity('remote',false);
}
}).
error(function(data, status, headers, config) {
ctrl.$setValidity('remote', false)