我使用ng-pattern来验证一些表单字段，我使用ng-change来观察和处理任何更改，但是ng-change(或$ scope。$ watch)只会在表单元素位于$ valid state！我是新的角，所以我不知道如何解决这个问题，虽然我怀疑一个新的指令是要走的路。
如何获得ng-change在$ invalid和$ valid表单元素状态中触发，ng-pattern仍然像以前一样设置表单元素的状态？
Html：
<div ng-app="test">
<div ng-controller="controller">
<form name="form">
<input type="text" name="textBox" ng-pattern="/^[0-9]+$/" ng-change="change()" ng-model="inputtext"> Changes: {{ changes }}
</form>
<br>
Type in any amount of numbers,and changes should increment.
<br><br>
Now enter anything that isn't a number,and changes will stop incrementing. When the form is in the $invalid state,ng-change doesn't fire.
<br><br>
Now remove all characters that aren't numbers. It will increment like normal again. When the form is in the $valid state,ng-change will fire.
<br><br>
I would like ng-change to fire even when the the form is $invalid.
<br><br>
form.$valid: <font color="red">{{ form.$valid }}</font>
</div>
</div>
Javascript：
angular.module('test',[]).controller('controller',function ($scope) {
$scope.changes = 0;
$scope.change = function () {
$scope.changes += 1;
};
});
我创建了一个工作的JS小提琴，它显示了我有的问题。
顺便说一下，这个角度问题似乎也是相关的：
https://github.com/angular/angular.js/issues/1296
你可以写一个简单的指令来监听输入事件。
HTML：
<input type="text" name="textBox" ng-pattern="/^[0-9]+$/" watch-change="change()" ng-model="inputtext"> Changes: {{ changes }}
JS：
app.directive('watchChange',function() {
return {
scope: {
onchange: '&watchChange'
},link: function(scope,element,attrs) {
element.on('input',function() {
scope.$apply(function () {
scope.onchange();
});
});
}
};
});
