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javascript - angular - catch 退格键

转载 作者:行者123 更新时间:2023-11-29 14:38:47 25 4
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我正在尝试通过 ngKeypressngKeydownngKeyup 来捕捉 backspace 键,follwing How can I detect keydown or keypress问题。

这是我的 HTML:

<input 
name="inputText"
type="text"
class="{{schema.class.control_part_class}} form-control"
data-ng-model="data[schema.model]"
ng-keydown = "changeInput($event)">
</input>

指令链接函数:

scope.changeInput = function(e){       
$log.log('scope', scope); //scope
$log.log('cont', controller); //controller
$log.log(e); //works for any other key
if(e.keyCode === 8){
//keycode for backspace
$log.log('backspace')
}
};

我已经尝试在 ngKeypressngKeydownngKeyup 之间进行替换,但它们都不起作用。

完整代码:html

<div form-field-injector schema="vm.schema" data="vm.data">
<span class="star-color-red" ng-show="schema.validation.required">*</span>
<label class="{{schema.class.label_part_class}} label-control">{{::schema.name}}
</label>
<input
name="inputText"
type="text"
class="{{schema.class.control_part_class}} form-control"
data-ng-model="data[schema.model]"
data-ng-model-options="{ debounce: 300 }"
data-ng-disabled="{{::schema.disabled}}"
ng-keydown = "changeInput($event)"></input>

指令:

(function () {
'use strict';

function IsrTextField($log, $compile, $templateRequest) {
$log = $log.getInstance('IsrTextField.directive', true);
$log.debug("load()");

var _templateUrl = 'common/directives/isr-text-field/templates/isr.text.field.tpl.html';
var _inputElement = null;

function _link(scope, iElem, iAttrs, controller) {
$log.log('scope input', scope);
function _onBlur() {
$log.debug("_onBlur()");
controller.eventRunner(controller.schema.events.on_blur.action, {
item: controller.schema.events.on_blur.args
});
}
scope.changeInput = function(e){
$log.log('scope', scope); //scope
$log.log('cont', controller); //controller
$log.log(e); //works for any other key
if(e.keyCode === 8){
//keycode for backspace
$log.log('backspace')
}
};


//1. request template from server
// Load the html through $templateRequest
$templateRequest(_templateUrl)
.then(function success(html) {
// Convert the html to an actual DOM node
var template = angular.element(html);
// Append it to the directive element
iElem.append(template);

// 1. get input element from template
_inputElement = $('.form-control', iElem);
if (!_inputElement) {
$log.warn("there is no .form-control element class");
return;
}

// set template attributes from schema (before compile)
if (controller.schema.modelOptions) {
_inputElement.attr("data-ng-model-options", controller.schema.modelOptions);
}

// set events/bind from schema
if (controller.schema.events && controller.schema.events.on_blur) {
if (controller.schema.events.on_blur.action) {
_inputElement.on('blur', _onBlur);
}
}

// And let Angular $compile it
$compile(template)(scope);
}, function failure(error){
$log.error(error);
});

// cleanup
scope.$on('$destroy',
function destroy() {
$log.debug("destroy()");
if (_inputElement) {
_inputElement.off('blur', _onBlur);
_inputElement = null;
}
});

}

var directive = {
restrict: 'EA',
scope: {
schema: '=',
data: '='
},
controller: 'isrTextFieldController',
controllerAs: 'vm',
bindToController: true,
link: _link
};

return directive;

}

angular
.module('common')
.directive('isrTextField', IsrTextField);

})();

最佳答案

在 Controller 中

我为您的代码写了一个干净的示例,它似乎可以工作。

JavaScript:

angular.module('myApp', [])
.controller('TestController', TestController);

function TestController($scope, $log) {
$scope.changeInput = function(e) {
$log.log('scope', $scope); //scope
$log.log(e); //works for any other key
if (e.keyCode === 8) {
//keycode for backspace
$log.log('backspace');
}
};
}

HTML:

<div ng-controller="TestController as test">
<input name="inputText"
type="text"
ng-keyup="changeInput($event)">
</div>

JSFiddle:http://jsfiddle.net/wcws0ubm/1/


在指令中

如果要封装<input>到一个指令,你可以使用下面的代码:

HTML:

<div ng-controller="TestController as test">
<test-element></test-element>
</div>

JavaScript:

angular.module('myApp', [])
.controller('TestController', ['$log', TestController])
.directive('testElement', ['$log', testElement]);

function TestController($log) {
$log.log("Controller loaded");
}

function testElement($log) {
return {
restrict: 'E',
template: '<input name="inputText" type="text" ng-keyup="changeInput($event)">',
link: function(scope) {
scope.changeInput = function(e) {
$log.log('scope', scope); //scope
$log.log(e); //works for any other key
if(e.keyCode === 8) {
//keycode for backspace
$log.log('backspace');
}
}
}
};
}

JSFiddle:http://jsfiddle.net/wcws0ubm/3/

关于javascript - angular - catch 退格键,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/41660091/

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