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最新推荐文章于 2020-04-29 19:25:27 发布

原创最新推荐文章于 2020-04-29 19:25:27 发布 · 135 阅读

CC 4.0 BY-SA版权

本文介绍了一种使用JavaScript实现的图片轮播效果，通过动画控制图片的显示与切换，并配合DOM操作实现平滑过渡。文章详细展示了如何设置定时器、绑定按钮点击事件以及通过动画效果调整图片透明度来完成轮播功能。


var timer = null;
var offset = 5000;
var index = 0;

//大图交替轮换
function slideImage(i){
    var id = 'image_'+ target[i];
    $('#'+ id)
        .animate({opacity: 1}, 800, function(){
            $(this).find('.word').animate({height: 'show'}, 'slow');
        }).show()
        .siblings(':visible')
        .find('.word').animate({height: 'hide'},'fast',function(){
            $(this).parent().animate({opacity: 0}, 800).hide();
        });
}
//bind thumb a
function hookThumb(){    
    $('#thumbs li a')
        .bind('click', function(){
            if (timer) {
                clearTimeout(timer);
            }                
            var id = this.id;            
            index = getIndex(id.substr(6));
            rechange(index);
            slideImage(index); 
            timer = window.setTimeout(auto, offset);  
            this.blur();            
            return false;
        });
}
//bind next/prev img
function hookBtn(){
    $('#thumbs li img').filter('#play_prev,#play_next')
        .bind('click', function(){
            if (timer){
                clearTimeout(timer);
            }
            var id = this.id;
            if (id == 'play_prev') {
                index--;
                if (index < 0) index = 6;
            }else{
                index++;
                if (index > 6) index = 0;
            }
            rechange(index);
            slideImage(index);
            timer = window.setTimeout(auto, offset);
        });
}

function bighookBtn(){
    $('#bigpicarea p span').filter('#big_play_prev,#big_play_next')
        .bind('click', function(){
            if (timer){
                clearTimeout(timer);
            }
            var id = this.id;
            if (id == 'big_play_prev') {
                index--;
                if (index < 0) index = 6;
            }else{
                index++;
                if (index > 6) index = 0;
            }
            rechange(index);
            slideImage(index);
            timer = window.setTimeout(auto, offset);
        });
}

//get index
function getIndex(v){
    for(var i=0; i < target.length; i++){
        if (target[i] == v) return i;
    }
}
function rechange(loop){
    var id = 'thumb_'+ target[loop];
    $('#thumbs li a.current').removeClass('current');
    $('#'+ id).addClass('current');
}
function auto(){
    index++;
    if (index > 6){
        index = 0;
    }
    rechange(index);
    slideImage(index);
    timer = window.setTimeout(auto, offset);
}
$(function(){    
    //change opacity
    $('div.word').css({opacity: 0.85});
    auto();  
    hookThumb(); 
    hookBtn();
	bighookBtn()

});