[原创]zepto打造一款移动端划屏插件 - wingkun

/*
kslider.css
lxk 2014.08.14
www.cnblogs.com/wingkun
*/


body{margin:0px;text-align:center;font:12px 微软雅黑;}

.kslider{width:100%;overflow:hidden;margin:0 auto;background:#f0f0f0;}

.kslider .ks_warp{width:100%;}
.kslider .ks_ts{-webkit-transition:500ms;}
.kslider .ks_dbox{width:100%;display:-webkit-box;text-align:left;}

.kslider .ks_wt{display:-webkit-box;margin:0px;padding:0px;-webkit-box-pack:center;}
.kslider .ks_wt li{text-align:center;list-style:none;background: -webkit-linear-gradient(top, #AAAAAA 0%,#979797 100%);color: #fff;}

.ks_wt_1 .ks_wt li{-webkit-box-flex:1;height:35px;line-height:35px;border-right:solid 1px #BBB;}
.ks_wt_2 .ks_wt li{background:-webkit-linear-gradient(top, #e7e7e7 0%,#dfdfdf 100%);text-indent: 20px;height:10px;width:10px;overflow:hidden; border-radius:100%;margin:5px;}

.ks_wt_1 .ks_wt .ks_t2{background:-webkit-linear-gradient(top, #e7e7e7 0%,#dfdfdf 100%); color:#000;}
.ks_wt_2 .ks_wt .ks_t2{background: -webkit-linear-gradient(top, #AAAAAA 0%,#979797 100%); -webkit-animation:kt2 500ms linear;}


@-webkit-keyframes kt2
{
0%{-webkit-transform:scale(1);}
100%{-webkit-transform:scale(1.5);}
}

/*
zepto.kslider.js
lxk 2014.08.14
www.cnblogs.com/wingkun
*/

(function ($) {
/*
参数：config

change:tab页变更事件
参数e: 当前页码
tick:自动滚动间隔时间毫秒 (不设置则不自动滚动)
maxWidth:容器最大宽度 (默认有100%)
minWidth:容器最小宽度 (默认有100%)
className:样式类名
"ks_wt_1" 标题栏-方形 (默认)
"ks_wt_2" 标题栏-小圆形
或者你自定义的类名

*/
$.fn.slider = function (config) {

config = $.extend({}, { className: "ks_wt_1" }, config);

var b = $(this), tw, timer,
target = b.find(".ks_dbox"),
title = b.find(".ks_wt"),
m = { initX: 0, initY: 0, startX: 0, endX: 0, startY: 0, canmove: false },
currentTab = 0;

b.toggleClass(config.className,true);
if (config.maxWidth) b.css({ maxWidth: config.maxWidth });
if (config.minWidth) b.css({ mixWidth: config.minWidth });

title.on("click", function (e) {
if (e.target == this) return;
toTab($(e.target).index());
});

b.on("touchstart", function (e) {
var et = e.touches[0];
if ($(et.target).closest(".ks_dbox").length != 0) {
m.canmove = true, m.initX = m.startX = et.pageX;
m.initY = et.pageY;
clearTimer();
}

}).on("touchmove", function (e) {

var et = e.touches[0];
if (m.canmove && Math.abs(et.pageY - m.initY) / Math.abs(et.pageX - m.initX) < 0.6) {
// if (m.canmove && Math.abs(et.pageX - m.startX) > 10) {
target.removeClass("ks_ts").css("-webkit-transform", "translate3d(" + (m.endX += et.pageX - m.startX) + "px,0,0)");
m.startX = et.pageX;
e.preventDefault();
}
}).on("touchend", function (e) {
if (!m.canmove) return;
target.toggleClass("ks_ts", true);

tw = target.width();
//是否超过了边界
var bl = false, current = Math.abs(m.endX / tw);

if (m.endX > 0) {
current = m.endX = 0;
bl = true;
}
else if (m.endX < -tw * (target.children().length - 1)) {
current = target.children().length - 1;
bl = true;
}

if (!bl) {
if (m.endX % tw != 0) {
//target.css("transform", "translate(" + (m.endX = -tw*Math.abs(Math.round(m.endX/tw))) + "px,0px)");
var str = parseInt((current + "").split(".")[1][0]);

if (e.changedTouches[0].pageX > m.initX) {
//往右
current = str <= 9 ? Math.floor(Math.abs(current)) : Math.abs(Math.round(m.endX / tw));
} else {
//往左
current = str >= 1 ? Math.floor(Math.abs(current)) + 1 : Math.abs(Math.round(m.endX / tw));
}
}
}
toTab(current);
setTimer();
m.canmove = false;
});

var move = function (i) {
target.css("-webkit-transform", "translate3d(" + (m.endX = i) + "px,0,0)");
}

var setIndex = function (i) {
return i < 0 ? 0 : i >= target.children().length ? target.children().length - 1 : i;
}

var toTab = function (i) {
i = setIndex(i), tw = target.width();
move(-tw * i), toTitle(i);
if (currentTab != i && config.change) {
config.change(i);
}
currentTab = i
}

var toTitle = function (i) {
if (title.length == 0) return;
title.children().toggleClass("ks_t2", false).eq(i).toggleClass("ks_t2", true);
}

var setTimer = function () {
if (!config.tick) return;
if (timer) clearTimer();
timer = setInterval(function () {
toTab(currentTab >= target.children().length - 1 ? 0 : currentTab + 1);
}, config.tick)
}

var clearTimer = function () {
clearInterval(timer);
timer = null;
}

setTimer();

return {
add: function (t, c) {
//添加tab
title.append("<li>" + t + "</li>");
target.append("<div class=\"ks_warp\">" + c + "</div>");
return this;
},
remove: function (i) {
//移除tab
if (title.children().length == 1) return;
i = setIndex(i);
title.children().eq(i).remove();
target.children().eq(i).remove();
if (i == currentTab) toTab(0);
return this;
}, tab: function (i) {
//设置或者获取当前tab
return i ? toTab(i) : currentTab;
}
}
}
})(Zepto);