反向JQuery幻燈片

Question

嗨我工作與JQuery幻燈片。我的所有圖片都是在我的html上，我試着讓我的代碼從最後一張圖片開始。但它不會工作，有什麼想法？

原來的代碼如下所示：

$(document).ready(function() { 
    var current = $('#gallery img:first'); 
    //Set the fade in effect for the next image, show class has higher z-index 
    current.addClass('show').css({ 
     opacity: 0.0 
    }).animate({ 
     opacity: 1.0 
    }, 1000); 

    setInterval('gallery()', 3000); 
}); 

function gallery() { 
    //if no IMGs have the show class, grab the first image 
    var current = ($('#gallery img.show') ? $('#gallery img.show') : $('#gallery img:first')); 

    //Get next image, if it reached the end of the slideshow, rotate it back to the first image 
    var next = ((current.next().length) ? current.next() : $('#gallery img:first')); 

    //Set the fade in effect for the next image, show class has higher z-index 
    next.css({ 
     opacity: 0.0 
    }).addClass('show').animate({ 
     opacity: 1.0 
    }, 1000); 

    //Hide the current image 
    current.animate({ 
     opacity: 0.0 
    }, 1000).removeClass('show'); 
}​ 

我的反向代碼如下所示：

$(document).ready(function() { 
    var current = $('#gallery img:last'); 
    //Set the fade in effect for the next image, show class has higher z-index 
    current.addClass('show').css({ 
     opacity: 0.0 
    }).animate({ 
     opacity: 1.0 
    }, 1000); 

    setInterval('gallery()', 3000); 
}); 

function gallery() { 
    //if no IMGs have the show class, grab the first image 
    var current = ($('#gallery img.show') ? $('#gallery img.show') : $('#gallery img:last')); 

    //Get next image, if it reached the end of the slideshow, rotate it back to the first image 
    var before = ((current.before().length) ? current.before() : $('#gallery img:last')); 

    //Set the fade in effect for the next image, show class has higher z-index 
    before.css({ 
     opacity: 0.0 
    }).addClass('show').animate({ 
     opacity: 1.0 
    }, 1000); 

    //Hide the current image 
    current.animate({ 
     opacity: 0.0 
    }, 1000).removeClass('show'); 
}​ 

Answer 1

在沒有測試頁，我加入UL圖片做：

var before = ((current.prev().length) ? current.prev() : $('#gallery img:last')); 

這將選擇要顯示的prev圖像，如果沒有，則再次選擇最後的圖像。

你可以試試，如果這對你有用嗎？