我是javascript的新手，需要帮助来实现以下功能：当用户输入邮政编码时，表格的任何其他条目都会被删除，邮政编码会用来查找地址。
我该怎么做？以下是我用于获取紧急护理区附近位置的代码：
(
function(){
var $scope, $location;
var urgentCareApp = angular.module('urgentCareApp',['ui.bootstrap']);
urgentCareApp.controller('UrgentCareController',function($scope,$http,$location,anchorSmoothScroll){
$scope.Lang = 'initVal';
$scope.ShowResults = false;
$scope.ShowDesc = true;
$scope.NoResults = false;
$scope.currentPage = 1;
$scope.maxPageNumbersToShow = 10;
$scope.formModel = {};
$scope.searchMode = 0;
$scope.miles = [{'value':'5'},{'value':'10'},{'value':'15'},{'value':'20' }];
$scope.searchParam = {};
$scope.searchParam.Distance = $scope.miles[0];
console.log($scope.searchParam.Distance);
//$scope.searchParam.Specialty = $scope.Specialties[0];
$scope.GetCurrentZip = function (){
try{
var lon, lat;
console.log('starting geoposition code.');
if("geolocation" in navigator){
window.navigator.geolocation.getCurrentPosition(function(pos){
lat = pos.coords.latitude.toFixed(3);
lon = pos.coords.longitude.toFixed(3);
console.log(lat + ' ' + lon);
$http.get("/remote/ReturnCurrentZipcode.cfm?Lat=" + lat + "&Lon=" + lon)
.success(function(response){
console.log('Response: ' + response);
$scope.searchParam.Zip = response;
console.log('object set');
})
})
}
else{ console.log('No geolocation'); }
}
catch(err) { console.log(err.message); }
}
$scope.GetCityList = function (){
try{
$http.get("/remote/ReturnUrgentCareCityList.cfm")
.success(function(response){
$scope.Cities = response.Cities;
})
}
catch(err){}
}
$scope.SearchUrgentCare = function(searchParam){
try{
$scope.searchMode = 1;
var queryString='';
if($scope.formModel && $scope.formModel !== searchParam){
$scope.resultsCount = 0;
currentPage = 1;
}
if(searchParam){
$scope.formModel = searchParam;
for(var param in searchParam){
console.log(param + ' ' + searchParam.hasOwnProperty(param) + ' ' + searchParam[param]);
if(searchParam.hasOwnProperty(param)){
var paramValue = searchParam[param].value ? searchParam[param].value.trim() : searchParam[param].trim();
if (paramValue.length > 0)
queryString += param + '=' + paramValue + '&';
}
}
}
console.log(queryString);
queryString= '?' + queryString + 'currentpage=' + $scope.currentPage;
$http.get("/remote/ReturnUrgentCareList.cfm" + queryString)
.success(function(response){
$scope.urgentCareCenters = response.UrgentCareCenters;
$scope.resultsCount = response.rowCount;
if (!$scope.urgentCareCenters){
$scope.NoResults = true;
$scope.ShowResults = false;
$scope.ShowDesc = false;
}
else{
$scope.NoResults = false;
$scope.ShowResults = true;
$scope.ShowDesc = false;
}
})
}
catch(err){ alert('No response.: ' + err.message); }
}
$scope.$watchGroup(['currentPage'], function(){
try{
if($scope.searchMode == 1){
$scope.SearchUrgentCare($scope.formModel);
}
}
catch(err){}
});
$scope.GetCityList();
$scope.GetCurrentZip();
$scope.gotoElement = function (eID){
var browserWidth = screen.availWidth;
if (browserWidth < 768)
anchorSmoothScroll.scrollTo(eID);
};
});
urgentCareApp.service('anchorSmoothScroll', function(){
this.scrollTo = function(eID) {
// This scrolling function
// is from http://www.itnewb.com/tutorial/Creating-the-Smooth-Scroll-Effect-with-JavaScript
var startY = currentYPosition();
var stopY = elmYPosition(eID);
var distance = stopY > startY ? stopY - startY : startY - stopY;
if (distance < 100) {
scrollTo(0, stopY); return;
}
var speed = Math.round(distance / 100);
if (speed >= 20) speed = 20;
var step = Math.round(distance / 25);
var leapY = stopY > startY ? startY + step : startY - step;
var timer = 0;
if (stopY > startY) {
for ( var i=startY; i<stopY; i+=step ) {
setTimeout("window.scrollTo(0, "+leapY+")", timer * speed);
leapY += step; if (leapY > stopY) leapY = stopY; timer++;
} return;
}
for ( var i=startY; i>stopY; i-=step ) {
setTimeout("window.scrollTo(0, "+leapY+")", timer * speed);
leapY -= step; if (leapY < stopY) leapY = stopY; timer++;
}
function currentYPosition() {
// Firefox, Chrome, Opera, Safari
if (self.pageYOffset) return self.pageYOffset;
// Internet Explorer 6 - standards mode
if (document.documentElement && document.documentElement.scrollTop)
return document.documentElement.scrollTop;
// Internet Explorer 6, 7 and 8
if (document.body.scrollTop) return document.body.scrollTop;
return 0;
}
function elmYPosition(eID) {
var elm = document.getElementById(eID);
var y = elm.offsetTop;
var node = elm;
while (node.offsetParent && node.offsetParent != document.body) {
node = node.offsetParent;
y += node.offsetTop;
} return y;
}
};
});
urgentCareApp.directive('allowPattern',[allowPatternDirective]);
function allowPatternDirective(){
return{
restrict: "A",
compile: function(tElement, tAttrs){
return function(scope, element, attrs){
element.bind("keypress", function(event){
var keyCode = event.which || event.keyCode;
var keyCodeChar = String.fromCharCode(keyCode);
if(!keyCodeChar.match(new RegExp(attrs.allowPattern, "i"))){
event.preventDefault();
return false;
}
});
}
}
}
}
urgentCareApp.filter('PhoneNumber', function(){
return function(phoneNumber){
var dash = '-';
if(phoneNumber){
var pn = phoneNumber;
pn = [pn.slice(0, 6), dash, pn.slice(6)].join('');
pn = [pn.slice(0, 3), dash, pn.slice(3)].join('');
return pn;
}
return phoneNumber;
}
});
})();
表格：
<div class="panel panel-default">
<div class="panel-body">
<form name="UrgentCareSearch" ng-submit="SearchUrgentCare(searchParam);" novalidate="" role="form">
<div class="form-group"><input class="form-control" id="urgentcare" ng-model="searchParam.UrgentCareName" placeholder="Urgent Care Name" type="text" /></div>
<div class="form-group"><select class="form-control" id="city" ng-model="searchParam.City" ng-options="City.value for City in Cities"><option disabled="disabled" selected="selected" value="">City</option> </select></div>
<hr />
<div style="margin-top:-10px; margin-bottom:10px; text-align:center; font-size:8pt! important">* or Search by Zip code radius *</div>
<div class="row">
<div class="col-xs-7 no-right-padding">
<div class="form-group">
<div class="input-group"><select class="form-control" name="distance" ng-model="searchParam.Distance" ng-options="mile.value for mile in miles"></select>
<div class="input-group-addon">miles</div>
</div>
</div>
</div>
<div class="col-xs-5 no-left-padding">
<div class="form-group"><input allow-pattern="[\d\W]" class="form-control" id="zip" maxlength="5" ng-model="searchParam.Zip" placeholder="Zip code" type="text" /></div>
</div>
</div>
<div class="form-group"><input class="btn btn-warning btn-block" ng-click="gotoElement('SearchResultsAnchor');" type="submit" value="Search" /></div>
</form>
</div>
</div>
答案 0 :(得分：0)
不确定您要做什么，但肯定可以使用ngChange指令，因此当用户输入任何内容Zip时，您可以在控制器中执行您想要的操作。< / p>
请参阅演示：
(function() {
"use strict";
angular.module('app', [])
.controller('mainCtrl', function($scope, $http) {
$scope.reset = function() {
// If you just want to clear the fields do it:
var zip = angular.copy($scope.searchParam.Zip);
$scope.searchParam = {};
$scope.searchParam.Zip = zip;
}
});
})();<html ng-app="app">
<head>
<script src="https://cdnjs.cloudflare.com/ajax/libs/angular.js/1.5.7/angular.min.js"></script>
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.6/css/bootstrap.min.css" />
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/2.2.4/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.6/js/bootstrap.min.js"></script>
</head>
<body ng-controller="mainCtrl">
<div class="panel panel-default">
<div class="panel-body">
<form name="UrgentCareSearch" ng-submit="SearchUrgentCare(searchParam);" novalidate="" role="form">
<div class="form-group">
<input class="form-control" id="urgentcare" ng-model="searchParam.UrgentCareName" placeholder="Urgent Care Name" type="text" />
</div>
<div class="form-group">
<select class="form-control" id="city" ng-model="searchParam.City" ng-options="City.value for City in Cities">
<option disabled="disabled" selected="selected" value="">City</option>
</select>
</div>
<hr />
<div style="margin-top:-10px; margin-bottom:10px; text-align:center; font-size:8pt! important">* or Search by Zip code radius *</div>
<div class="row">
<div class="col-xs-7 no-right-padding">
<div class="form-group">
<div class="input-group">
<select class="form-control" name="distance" ng-model="searchParam.Distance" ng-options="mile.value for mile in miles"></select>
<div class="input-group-addon">miles</div>
</div>
</div>
</div>
<div class="col-xs-5 no-left-padding">
<div class="form-group">
<input allow-pattern="[\d\W]" class="form-control" id="zip" maxlength="5" ng-model="searchParam.Zip" placeholder="Zip code" ng-change="reset()" type="text" />
</div>
</div>
</div>
<div class="form-group">
<input class="btn btn-warning btn-block" ng-click="gotoElement('SearchResultsAnchor');" type="submit" value="Search" />
</div>
</form>
</div>
</div>
</body>
</html>
答案 1 :(得分：-1)
你应该使用angular $ scope。$ watch或ng-change指令 例如，如果我想在变量$ scope.varA更改时做某事 你可以使用：
$scope.$watch("varA", function(){
//my code
//in your case (type searchParams.Zip where i wrote varA)
var zip = $scope.searchParams.Zip; //keep before cleaning
$scope.searchParams = {};
$scope.searchParams.Zip = zip;
});
或声明一个角度函数并在html输入上使用ng-change指令，其中使用了ng-model作为邮政编码，（将其添加为属性：ng-change =＆＃34; clean_form（）;＆＃34 ;）
$scope.clean_form = function(){
var zip = $scope.searchParams.Zip;
$scope.searchParams = {};
$scope.searchParams.Zip = zip;
};
表单清理代码来自developer033，我只是想告诉你如何使代码发生