Php addEventListener()附加到多个按钮,但只触发一次
我正在用PHP/FBJS编写一个Facebook应用程序。我有一些代码,将addEventListener附加到两个按钮上。当我运行应用程序时,我单击的第一个按钮触发addEventListener,事件处理程序按预期调用。但是,如果我单击第二个按钮或再次单击同一个按钮,则不会调用事件处理程序。这是我的密码:Php addEventListener()附加到多个按钮,但只触发一次,php,ajax,event-handling,fbjs,addeventlistener,Php,Ajax,Event Handling,Fbjs,Addeventlistener,我正在用PHP/FBJS编写一个Facebook应用程序。我有一些代码,将addEventListener附加到两个按钮上。当我运行应用程序时,我单击的第一个按钮触发addEventListener,事件处理程序按预期调用。但是,如果我单击第二个按钮或再次单击同一个按钮,则不会调用事件处理程序。这是我的密码: //PHP public function loadCargoDialogFbjsAction() { $this->_helper->layout
//PHP
public function loadCargoDialogFbjsAction() {
$this->_helper->layout()->disableLayout();
$this->_helper->viewRenderer->setNoRender();
$loadableCargo = $this->getRequest()->getPost('loadableCargo');
$fbjs =
'<div id="load_cargo_select">
<form id="load_cargo_select_form" action="" method="POST">
<p>Your train has stopped in the city of ' . $loadableCargo['city'] . '</p>
<p>' . $loadableCargo['city'] . ' produces the following goods:</p>
<ul>';
if(count($loadableCargo['city_goods']) <= 0) {
$fbjs .= '<li>None</li>';
} else {
foreach($loadableCargo['city_goods'] as $goods) {
$fbjs .= '<li>' . $goods['name'] . '</li>';
}
}
$fbjs .=
'</ul>
<p>Your train is hauling the following goods:</p>
<ul>';
if(count($loadableCargo['train_goods']) <= 0) {
$fbjs .= '<li>None</li>';
} else {
foreach($loadableCargo['train_goods'] as $goods) {
$fbjs .= '<li>' . $goods['name'] . '</li>';
}
}
$fbjs .=
'</ul>
<p>What would you like to do?</p>
<input type="button" id="load-new-submit" name="load-cargo-new" value="Load new goods" />
<input type="button" id="discard-existing-submit" name="load-cargo-discard" value="Discard existing goods" />
</form>
</div>';
echo $fbjs;
}
// JavaScript/FBJS
function loadCargo() {
var actionPrompt = document.getElementById('action-prompt');
actionPrompt.setTextValue('Loading cargo...');
var ajax = new Ajax();
ajax.responseType = Ajax.JSON;
ajax.ondone = function(data) {
//debugger;
ajax.responseType = Ajax.FBML;
ajax.ondone = function(fbjsData) {
//debugger;
if(data.loadableCargo.length == 0) {
moveTrainManual();
} else {
var dialog = new Dialog().showChoice('Load Cargo', fbjsData, 'Minimize', 'Pass');
var dlgBtnNew = document.getElementById('load-new-submit');
dlgBtnNew.cityId = data.loadableCargo.city_id;
dlgBtnNew.trainId = data.loadableCargo.train_id;
dlgBtnNew.addEventListener('click', cargoEventHandler); //loadNewCargo);
var dlgBtnDiscard = document.getElementById('discard-existing-submit');
dlgBtnDiscard.cityId = data.loadableCargo.city_id;
dlgBtnDiscard.trainId = data.loadableCargo.train_id;
dlgBtnDiscard.addEventListener('click', cargoEventHandler); //discardExistingCargo);
dialog.onconfirm = function() {
// Submit the form if it exists, then hide the dialog.
dialog.hide();
actionPrompt = document.getElementById('action-prompt');
actionPrompt.setInnerXHTML('<span><div id="action-text">'+
'The "Load cargo" dialog has been minimized'+
'</div>'+
'<div id="action-end">'+
'<form action="" method="POST">'+
'<input type="button" value="Maximize" id="next-phase" onclick="loadCargo();" />'+
'</form>'+
'</div></span>');
actionButton = document.getElementById('next-phase');
actionButton.setValue('Maximize');
actionButton.addEventListener('click', loadCargoEventHandler);
};
dialog.oncancel = function() {
moveTrainManual();
}
}
}
ajax.post(baseURL + '/turn/load-cargo-dialog-fbjs', data);
}
ajax.post(baseURL + '/turn/load-cargo');
}
function cargoEventHandler(evt) {
//new Dialog().showMessage('loadNewCargo', 'city id='+cityId+', train id='+trainId);
//debugger;
cityId = evt.target.cityId;
trainId = evt.target.trainId;
switch(evt.target.getId()) {
case 'load-new-submit':
ajax = new Ajax();
ajax.responseType = Ajax.JSON;
param = { 'load-cargo-submit': "Load new goods", 'city-id': cityId, 'train-id': trainId };
ajax.ondone = function(data) {
openCargoHolds = data.openCargoHolds;
cargoHoldsUsed = 0;
ajax.responseType = Ajax.FBML;
param = { 'openCargoHolds': data.openCargoHolds, 'cityGoods': data.cityGoods, 'trainId': data.trainId };
ajax.ondone = function(fbjsData) {
//debugger;
var dialog = new Dialog().showChoice('Load Cargo', fbjsData, 'Load cargo', 'Cancel');
dialog.onconfirm = function() {
var goods = [];
var goodsIds = [];
numGoods = document.getElementById('goods-count').getValue();
for(var i = 0; i < numGoods; i++) {
j = i + 1;
goods[i] = document.getElementById('goods-' + j).getValue();
goodsIds[i] = document.getElementById('goods-id-' + j).getValue();
}
var trainId = document.getElementById('train-id').getValue();
param = { "goods": goods, "goods-id": goodsIds, "train-id": trainId };
ajax.responseType = Ajax.JSON;
ajax.ondone = function(data) {
loadCargo();
}
ajax.post(baseURL + '/turn/do-load-cargo-new', param);
//dialog.hide();
};
dialog.oncancel = function() {
loadCargo();
}
}
ajax.post(baseURL + '/turn/load-cargo-new-dialog-fbjs', param);
}
ajax.post(baseURL + '/turn/load-cargo-select', param);
break;
case 'discard-existing-submit':
ajax = new Ajax();
ajax.responseType = Ajax.JSON;
param = { 'load-cargo-submit': "Discard existing goods", 'city-id': cityId, 'train-id': trainId };
ajax.ondone = function(data) {
ajax.responseType = Ajax.FBML;
param = { 'openCargoHolds': data.openCargoHolds, 'trainGoods': data.trainGoods, 'trainId': data.trainId };
ajax.ondone = function(fbjsData) {
var dialog = new Dialog().showChoice('Discard Cargo', fbjsData, 'Discard cargo', 'Cancel');
dialog.onconfirm = function() {
var goods = [];
var goodsIds = [];
numGoods = document.getElementById('goods-count').getValue();
for(var i = 0; i < numGoods; i++) {
j = i + 1;
goods[i] = document.getElementById('goods-' + j).getValue();
goodsIds[i] = document.getElementById('goods-id-' + j).getValue();
}
var trainId = document.getElementById('train-id').getValue();
param = { "goods": goods, "goods-id": goodsIds, "train-id": trainId };
ajax.responseType = Ajax.JSON;
ajax.ondone = function(data) {
loadCargo();
}
ajax.post(baseURL + '/turn/do-load-cargo-discard', param);
//dialog.hide();
};
dialog.oncancel = function() {
loadCargo();
}
}
ajax.post(baseURL + '/turn/load-cargo-discard-dialog-fbjs', param);
}
ajax.post(baseURL + '/turn/load-cargo-select', param);
break;
}
return false;
}
任何帮助都将不胜感激。谢谢
@提姆
我对loadCargo函数进行了如下更改,以防止这些元素的重复,但我仍然遇到与以前相同的问题
var loadCargoDialog;
function loadCargo() {
var actionPrompt = document.getElementById('action-prompt');
actionPrompt.setTextValue('Loading cargo...');
var ajax = new Ajax();
ajax.responseType = Ajax.JSON;
ajax.ondone = function(data) {
//debugger;
ajax.responseType = Ajax.FBML;
ajax.ondone = function(fbjsData) {
//debugger;
if(data.loadableCargo.length == 0) {
moveTrainManual();
} else {
if(loadCargoDialog == null) {
loadCargoDialog = new Dialog().showChoice('Load Cargo', fbjsData, 'Minimize', 'Pass');
var dlgBtnNew = document.getElementById('load-new-submit');
dlgBtnNew.cityId = data.loadableCargo.city_id;
dlgBtnNew.trainId = data.loadableCargo.train_id;
dlgBtnNew.addEventListener('click', cargoEventHandler, true); //loadNewCargo);
var dlgBtnDiscard = document.getElementById('discard-existing-submit');
dlgBtnDiscard.cityId = data.loadableCargo.city_id;
dlgBtnDiscard.trainId = data.loadableCargo.train_id;
dlgBtnDiscard.addEventListener('click', discardExistingCargo, true);
} else {
loadCargoDialog.showChoice('Load Cargo', fbjsData, 'Minimize', 'Pass');
}
loadCargoDialog.onconfirm = function() {
// Submit the form if it exists, then hide the dialog.
loadCargoDialog.hide();
actionPrompt = document.getElementById('action-prompt');
actionPrompt.setInnerXHTML('<span><div id="action-text">'+
'The "Load cargo" dialog has been minimized'+
'</div>'+
'<div id="action-end">'+
'<form action="" method="POST">'+
'<input type="button" value="Maximize" id="next-phase" onclick="loadCargo();" />'+
'</form>'+
'</div></span>');
actionButton = document.getElementById('next-phase');
actionButton.setValue('Maximize');
actionButton.addEventListener('click', loadCargoEventHandler);
};
loadCargoDialog.oncancel = function() {
moveTrainManual();
}
}
}
ajax.post(baseURL + '/turn/load-cargo-dialog-fbjs', data);
}
ajax.post(baseURL + '/turn/load-cargo');
}
看起来您可能正在创建具有相同id的元素。这将导致它中断。您是指我的代码示例中的元素,还是指我的应用程序中的其他元素?如果它们在我的代码示例中,请识别它们好吗?谢谢,也许你是对的。它可能与创建Load Cargo对话框的第二个实例有关。可能是因为同一对话框中有两个实例包含具有相同ID的相同元素造成的混淆?你能想出一个解决方案吗?加载新提交,放弃现有提交我没有仔细查看代码,但是,在响应过程中,每次进行服务器调用时,似乎都会返回这些Id。您可以在Id的末尾添加某种名称空间或Id。您必须为每个实例维护一个唯一的标识符。谢谢Tim。我试图解决这个问题,但没有成功。你介意看看我在原始帖子中的编辑,帮我找出我仍然做错了什么吗?