使用來自PHP的新幻燈片通過jQuery重新初始化幻燈片

Question

我正在使用優秀的Cycle2插件在我的網站上播放幻燈片，如下所示： http ： //new.element17.com 。

幻燈片在為Cycle2指定的div內生成，如下所示：

<?php
    if(isset($_COOKIE["currentalbum"])) {
        $currentalbum = $_COOKIE["currentalbum"];
    } else {
        $currentalbum = "gallery/01_New";
    }
    $photos = glob($currentalbum.'/*.[Jj][Pp][Gg]');
    $albumparts = explode('_', $currentalbum);
    switch (array_key_exists(2,$albumparts)) {
        case false:
            usort($photos,"cmpexiftime");
            break;
        case true:
            usort($photos,"cmpexiftimer");
            break;
    }
    foreach($photos as $photo){
        $title = basename($photo,".jpg");
        $exif = read_exif_data_raw("$photo",0);
        $desc = $exif["IFD0"]["ImageDescription"];
        $camera = ucwords(strtolower($exif["IFD0"]["Model"]));
        switch($exif["SubIFD"]["LensInfo"]) {
            case "105.0 mm f/2.8":
                $lens = "Micro-Nikkor 105mm f/2.8 VR";
                break;
            case "50.0 mm f/1.8":
                $lens = "Nikkor 50mm f/1.8D";
                break;
            case "17.0-50.0 mm f/2.8":
                $lens = "Tamron 17-50mm f/2.8 VC";
                break;
            case "70.0-300.0 mm f/4.5-5.6":
                $lens = "Nikkor 70-300mm f/4.5-5.6 VR";
                break;
            default:
                $lens = $exif["SubIFD"]["LensInfo"];
                break;
        }
        $length = str_replace(" ","",$exif["SubIFD"]["FocalLength"]);
        $shutter = str_replace(" ","",str_replace("ec","",$exif["SubIFD"]["ShutterSpeedValue"]));
        $aperture = $exif["SubIFD"]["ApertureValue"];
        $iso = $exif["SubIFD"]["ISOSpeedRatings"];
        list($width,$height) = getimagesize($photo);
        if ($height >= $width) {                            
            $photolist .= '<span data-title="'.$title.'" data-desc="'.$desc.'" data-camera="'.$camera.'" data-lens="'.$lens.'" data-length="'.$length.'" data-shutter="'.$shutter.'" data-aperture="'.$aperture.'" data-iso="'.$iso.'" style="background-image:url('.$photo.'); background-size:contain;" class="slide"></span>';
        } else {
            $photolist .= '<span data-title="'.$title.'" data-desc="'.$desc.'" data-camera="'.$camera.'" data-lens="'.$lens.'" data-length="'.$length.'" data-shutter="'.$shutter.'" data-aperture="'.$aperture.'" data-iso="'.$iso.'" style="background-image:url('.$photo.'); background-size:cover;" class="slide"></span>';
        }
    }
?>

幻燈片的div設置如下：

<div class="cycle-slideshow" data-cycle-slides="> span" data-cycle-timeout="10000" data-cycle-speed="1000" data-cycle-sync=false data-cycle-overlay-template="
    <div class='photo_title'>{{title}}</div>
    <div class='photo_desc'>{{desc}}</div>
    <div class='exif'>{{camera}}, {{lens}} @ {{length}}, {{shutter}}, {{aperture}}, ISO {{iso}}
    </div>
    <img src='images/close_pane.png' class='fadein close_pane button toggleinfo' alt='Close Info Pane'>" data-cycle-prev="#prev" data-cycle-next="#next" id="slideshow">
    <div class="cycle-overlay custom info"></div>
    <?php echo $photolist; ?>
</div>

還有一個專輯列表，生成如下：

<div class="toggleblock pane" id="albums">
<?php
    $directory = 'gallery/*';
    $subfolders = glob($directory);
    foreach($subfolders as $subfolder) {
        $album = explode('_'. $subfolder);
        $albumname = str_replace(' ','%20',$album[1]);
        echo '<a href="#" class="fadein togglealbum" id="',$subfolder,'">',$albumname,'</a>';
    }
?>
<img src="images/close_pane.png" class="togglelink fadein close_pane button" data-block="albums" alt="Close Album List">
</div>

當用戶點擊其中一個專輯時，這里是觸發的jQuery：

$('.togglealbum').on('click',function() {       
    var slideshow = $('#slideshow');
    slideshow.cycle('destroy');
    slideshow.html("HTML GOES HERE");
    slideshow.cycle();
    $.cookie("currentalbum",(this).id,{expires:7});
});

我現在已經開始討論如何將新幻燈片的HTML放到該slideshow.html()方法中一兩天了。 現在發生的情況是，由於設置了cookie，當您點擊相冊然后刷新頁面時，新相冊會加載。 我想過可能有這個方法重新加載頁面本身（我還不知道這是否可能），但這看起來真的很不優雅。

有沒有什么方法可以讓幻燈片生成的代碼基本上重新運行？

我還考慮過提前生成所有專輯的所有幻燈片，並將它們填充到變量名稱的變量中（我知道大多數人討厭它們，但我喜歡PHP中變量變量的概念），但我仍然可以'從PHP代碼跳轉到jQuery。

有人可以幫我嗎？

Answer 1

聽起來你想要做的是使用一個PHP腳本的AJAX請求，它可以發回專輯的信息。 唯一的另一種方法是將所有專輯信息預先生成並發送到頁面，然后使用JavaScript來確定哪些實際上在頁面上可見。

服務器上的PHP腳本（為簡潔起見，從中途開始）：

<?php
    $directory = 'gallery/*';
    $subfolders = glob($directory);
    $albums = array();
    foreach($subfolders as $subfolder) {
        $album = explode('_'. $subfolder);
        $albumname = str_replace(' ','%20',$album[1]);
        array_push($albums, array('name' => $albumname, 'subfolder' => $subfolder));
    }
    echo json_encode($albums);
?>

客戶端中的JavaScript：

$('.togglealbum').on('click',function() {
    $.ajax("my_uri", { dataType : "json", success: function(data, textStatus, jqXHR) {
        var slideshow = $('#slideshow');
        var html = "";
        for (var i = 0; i < data.length; i++) {
            html += "<a href='#' class="fadein togglealbum" id='" + data[i].subfolder + "'>" + data[i].name + "</a>";
        }
        slideshow.cycle('destroy');
        slideshow.html(html);
        slideshow.cycle();
    } });    

}）;

顯然，根據您的需要調整輸出HTML和腳本。

Answer 2

我從您的網站下載了所有內容，並將其合並到index.php文件中，並附帶您給定的PHP代碼，

我通過將所有照片數據分配給php變量然后通過對其進行第一次JSON編碼將其傳遞給全局JS變量來解決您的問題。

http://w3egitim.com/stack/在這里你可以看看。

有一些錯誤，但我認為這是因為我不完全理解你的所有jquery插件是如何工作的。

這是我的index.php和一些評論

    <?php
    ini_set("display_errors", true);
    error_reporting(E_ALL);

    include "exif.inc.php"; //I included this for read_exif_data_raw function was undefined

    if(isset($_COOKIE["currentalbum"])) {
            $currentalbum = $_COOKIE["currentalbum"];
    } else {
        $currentalbum = "gallery/01_New";
    }

    $photolist = getPhotoList($currentalbum); //get photolist data from a function


    //normal flow breaks here
    //we get all photollists for all album lists
    $allList = array();
    $directory = 'gallery/*';
    $subfolders = glob($directory);
    foreach($subfolders as $subfolder) {
        $album = explode('_', $subfolder);
        $albumname = str_replace(' ','%20',$album[1]);
        $allList[$subfolder] = getPhotoList($subfolder); //get photolist for each of the albums
    }

    $allList = json_encode($allList); //json encode them

  // I encapsulated your photo list code into a function for reusability
    function getPhotoList($currentalbum){
        $photos = glob($currentalbum.'/*.[Jj][Pp][Gg]');
        $albumparts = explode('_', $currentalbum);
        switch (array_key_exists(2,$albumparts)) {
            case false:
                usort($photos,"cmpexiftime");
                break;
            case true:
                usort($photos,"cmpexiftimer");
                break;
        }
        $photolist = "";
        foreach($photos as $photo){
            $title = basename($photo,".jpg");
            $exif = read_exif_data_raw("$photo",0);

            $desc = @$exif["IFD0"]["ImageDescription"];
            $camera = ucwords(strtolower(@$exif["IFD0"]["Model"]));
            switch(@$exif["SubIFD"]["LensInfo"]) {
                case "105.0 mm f/2.8":
                    $lens = "Micro-Nikkor 105mm f/2.8 VR";
                    break;
                case "50.0 mm f/1.8":
                    $lens = "Nikkor 50mm f/1.8D";
                    break;
                case "17.0-50.0 mm f/2.8":
                    $lens = "Tamron 17-50mm f/2.8 VC";
                    break;
                case "70.0-300.0 mm f/4.5-5.6":
                    $lens = "Nikkor 70-300mm f/4.5-5.6 VR";
                    break;
                default:
                    $lens = @$exif["SubIFD"]["LensInfo"];
                    break;
            }
            $length = str_replace(" ","",$exif["SubIFD"]["FocalLength"]);
            $shutter = str_replace(" ","",str_replace("ec","",$exif["SubIFD"]["ShutterSpeedValue"]));
            $aperture = $exif["SubIFD"]["ApertureValue"];
            $iso = $exif["SubIFD"]["ISOSpeedRatings"];
            list($width,$height) = getimagesize($photo);

            if ($height >= $width) {                            
                $photolist .= '<span data-title="'.$title.'" data-desc="'.$desc.'" data-camera="'.$camera.'" data-lens="'.$lens.'" data-length="'.$length.'" data-shutter="'.$shutter.'" data-aperture="'.$aperture.'" data-iso="'.$iso.'" style="background-image:url('.$photo.'); background-size:contain;" class="slide"></span>';
            } else {
                $photolist .= '<span data-title="'.$title.'" data-desc="'.$desc.'" data-camera="'.$camera.'" data-lens="'.$lens.'" data-length="'.$length.'" data-shutter="'.$shutter.'" data-aperture="'.$aperture.'" data-iso="'.$iso.'" style="background-image:url('.$photo.'); background-size:cover;" class="slide"></span>';
            }
        }

        return $photolist;
    }

    function cmpexiftime($a, $b) { 
        $exif1 = exif_read_data($a, 0, true); 
        $exif2 = exif_read_data($b, 0, true); 

        if ($exif1["EXIF"]["DateTimeOriginal"]==$exif2["EXIF"]["DateTimeOriginal"]) { 
         return 0; 
         } 
         return $exif1["EXIF"]["DateTimeOriginal"] < $exif2["EXIF"]["DateTimeOriginal"] ? -1 : 1; 
        } 
    ?>
<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="utf-8" />
        <title>Element&#185;&#8311; Photography</title>
        <link rel="stylesheet" href="css/main.css" />
        <script src="js/jquery-1.8.0.min.js"></script>
        <script src="js/jquery.cycle2.min.js"></script>
        <script src="js/jquery.cokie.js"></script>
        <script src="js/main.js"></script>
        <script type="text/javascript">
                        //here I just echo json encoded string to JS, you should use a more secure JSON decode library for javascript
            var all_photo_data = <?php echo $allList;?>;

        </script>
    </head>
    <body>

然后你的main.js需要跟蹤你想出來的變化

$('.togglealbum').on('click',function() {       
        var slideshow = $('#slideshow');
        slideshow.cycle('destroy');
        slideshow.html(all_photo_data[(this).id]);
        slideshow.cycle();
        $.cookie("currentalbum",(this).id,{expires:7});
    });