问题
I am in a bit trouble as I don't know how to implement the image popup in jquery for firebase. I have searched it on the internet but did not find the way how to implement it for the dynamic websites. I am having the following jquery code, can anyone help? I haven't found anything on stackoverflow also regarding this.
this is my html code
<html>
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<!-- The above 3 meta tags *must* come first in the head; any other head content must come *after* these tags -->
<meta name="description" content="">
<meta name="author" content="">
<title>images</title>
<!-- Latest compiled and minified CSS -->
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css" integrity="sha384-1q8mTJOASx8j1Au+a5WDVnPi2lkFfwwEAa8hDDdjZlpLegxhjVME1fgjWPGmkzs7" crossorigin="anonymous">
<!-- Optional theme -->
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap-theme.min.css" integrity="sha384-fLW2N01lMqjakBkx3l/M9EahuwpSfeNvV63J5ezn3uZzapT0u7EYsXMjQV+0En5r" crossorigin="anonymous">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/font-awesome/4.6.3/css/font-awesome.min.css">
<link rel="stylesheet" href="overrides.css">
</head>
<style>
.contentImage{
position: relative;
}
.image {
opacity: 1;
display: block;
width: 100%;
height: 40%;
transition: .5s ease;
backface-visibility: hidden;
}
.image:hover {
opacity: 0.3;
}
.gallery {
margin: 5px;
border: 1px solid #ccc;
float: left;
width: 180px;
}
.gallery:hover {
border: 1px solid #777;
}
.gallery img {
width: 100%;
height: auto;
}
</style>
<body>
<nav class="navbar navbar-inverse navbar-static-top">
<div class="container">
<div class="navbar-header">
<button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar" aria-expanded="false" aria-controls="navbar">
<span class="sr-only">Toggle navigation</span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
<a class="navbar-brand" href="#">here is the title</a>
</div>
<div id="navbar" class="collapse navbar-collapse">
<ul class="nav navbar-nav">
<li><a href="index.html">Home</a></li>
<li><a href="#">Your images</a></li>
<li class="active"><a href="#">Public images</a></li>
</ul>
</div><!--/.nav-collapse -->
</div>
</nav>
<div class="container" id="contentHolder">
</div>
<script src="https://www.gstatic.com/firebasejs/live/3.0/firebase.js"></script>
<script>
// Initialize Firebase
var config = {
apiKey: "AIzaSyB181Itkz9i9YjeJYLq9GbF94p8409wEfE",
authDomain: "farmyantra.firebaseapp.com",
databaseURL: "https://farmyantra.firebaseio.com",
storageBucket: "farmyantra.appspot.com",
messagingSenderId: "146534813177"
};
firebase.initializeApp(config);
</script>
<script src="https://apis.google.com/js/platform.js" async defer></script>
<!-- Bootstrap core JavaScript
================================================== -->
<!-- Placed at the end of the document so the pages load faster -->
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
<script>window.jQuery || document.write('<script src="../../assets/js/vendor/jquery.min.js"><\/script>')</script>
<!-- Latest compiled and minified JavaScript -->
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js" integrity="sha384-0mSbJDEHialfmuBBQP6A4Qrprq5OVfW37PRR3j5ELqxss1yVqOtnepnHVP9aJ7xS" crossorigin="anonymous"></script>
<script type="text/javascript" src="timeline.js"></script>
</body>
</html>
and this is my js file
$(document).ready(function(){
firebase.auth().onAuthStateChanged(function(user) {
if (user) {
// User is signed in.
var token = firebase.auth().currentUser.uid;
queryDatabase(token);
} else {
// No user is signed in.
window.location = "index.html";
}
});
});
function queryDatabase(token) {
firebase.database().ref('/Posts/').once('value').then(function(snapshot) {
var PostObject = snapshot.val();
var keys = Object.keys(PostObject);
var currentRow;
for (var i = 0; i< keys.length; i++) {
var currentObject = PostObject[keys[i]];
if (i % 4 == 0) {
currentRow = document.createElement("div");
$(currentRow).addClass("row");
$("#contentHolder").append(currentRow);
}
var col = document.createElement("div");
$(col).addClass("col-lg-3");
var image = document.createElement("img");
image.src = currentObject.url;
$(image).addClass("contentImage image hover ");
var p = document.createElement("p");
$(p).html(currentObject.caption);
$(p).addClass("contentCaption");
$(col).append(image);
$(col).append(p);
$(currentRow).append(col);
//create new row on every third entry
//col-lg-4
}
// ...
});
}
回答1:
Well, your question is not clear. However let me try to answer as per my understanding. If you want to display images in a popup, add a bootstrap modal to html, and on click of each image that you are displaying from firebase database,show the bootstrap modal as explained below:
Add this modal div to your HTML:
<div id="imageModal" class="modal fade" role="dialog">
<div class="modal-dialog modal-sm">
<div class="modal-content">
<div class="modal-header">
<button type="button" class="close" data-dismiss="modal">×</button>
<h3 class="modal-title">Caption goes here..</h3>
</div>
<div class="modal-body">
<div id="image"> </div>
</div>
</div>
</div>
Now in your timeline.js file, add below code:
$('img').on('click', function () {
$('#imageModal #image').empty();
var imgUrl = $(this).attr('src');
var caption = $(this).siblings('.contentCaption').html();
$('#imageModal #image').append('<img width="100%" height="100%" src="' + imgUrl + '"></img>');
$('#imageModal .modal-title').text(caption);
$('#imageModal').modal('show');
});
Note: There is a small error in your queryDatabase function:
var image = document.createElement("img");
image = document.createElement("div")
image.src = currentObject.url;
You are creating an image element and assigning the same variable to a div element. So, the image element is overwritten by div element. Delete the second statement image = document.createElement("div") for you to display the image element.
来源：https://stackoverflow.com/questions/43537135/how-to-implement-an-image-popup-in-jquery-for-firebase