无法在DOM中导航动态创建的页面

Question

After so many trials, I have finally managed to create pages dynamically using PHP, JSON and AJAX and load them into DOM. But the problem now is I'm unable to call/navigate those pages dynamically, but manually i.e gallery.html#page1 ...etc.

I seek guidance rather than burdening you, as I'm here to learn.

**PHP - photos.php **

$photos = array();
$i=0;
while ($row = mysqli_fetch_array($query)){
 $img = $row["fn"];
 $photos[] = $img;
 $i++;
}

$count = count($photos);
echo json_encode(array('status' => 'success', 'count' => $count, 'items' => $photos));

JSON array

{
"status":"success",
"count":3,
"items":
 [
"img1.jpg",
"img2.jpg",
"img3.jpg"
 ]
}

I use the below method to fetch and store ID of the desired gallery,

<input type="hidden" value="<?php echo $id; ?>" id="displayid" />

and then I call it back to use it in AJAX.

var ID = $('#displayid').val();

AJAX and JQM

$.ajax({
Type: "GET",
url: 'photos.php',
data: { display: ID }, // = $('#displayid').val();
dataType: "json",
contentType: "application/json",
success: function(data) {
 var count = data.count;
 var number = 0;
 $.each(data.items, function(i,item) {
  var newPage = $("<div data-role=page data-url=page" + number + "><div data-role=header><h1>Photo " + number + "</h1></div><div data-role=content><img src=" + item + " /></div></div");
  newPage.appendTo( $.mobile.pageContainer );
  number++;
  if (number == count) { $.mobile.changePage( newPage ); }; // it goes to last page

I got this code from here thanks Gajotres to dynamically navigate between pages. It's within the same code.

$(document).on('pagebeforeshow', '[data-role="page"]', function(){       
 var nextpage = $(this).next('div[data-role="page"]');
 if (nextpage.length > 0) {    
  $.mobile.activePage.find('[data-role="header"]').append($('<a>').attr({'href':'#'+nextpage.attr('id'),'data-theme':'b'}).addClass('ui-btn-right').html('Next').button());
 }  
}); // next button 
}); // each loop 
} // success
}); //ajax

Answer 1

I found your problem.

This part of code can't be used here like this:

$(document).on('pagebeforeshow', '[data-role="page"]', function(){       
    var nextpage = $(this).next('div[data-role="page"]');
    if (nextpage.length > 0) {    
        $.mobile.activePage.find('[data-role="header"]').append($('<a>').attr({'href':'#'+nextpage.attr('id'),'data-theme':'b'}).addClass('ui-btn-right').html('Next').button());
    }  
});

This is the problem. First remove pagebeforeshow event binding, it can't be used here like that. Rest of the code is not going to do anything because currently there are any next page (next page is going to be generated during then next loop iteration), so remove this whole block.

Now, after the each block ends and all pages are generated (that is the main thing, all pages should exist at this point), add this code:

$('[data-role="page"]').each(function(){
    var nextpage = $(this).next('div[data-role="page"]');
    if (nextpage.length > 0) {    
        $(this).find('[data-role="header"]').append($('<a>').attr({'href':'#'+nextpage.attr('id'),'data-theme':'a'}).addClass('ui-btn-right').html('Next').button());
    }         
});

This is what will happen. Each loop will loop through every available page (we have them all by now) and in case it is not the last one it will add next button.

Here's a live example: http://jsfiddle.net/Gajotres/Xjkvq/

Ok in this example pages are already there, but point is the same. They need to exist (no matter if you add them dynamically or if they are preexisting) before you can add next buttons.

I hope this helps.