touchSwipe 上下左右滑动，二指缩放 效果不好。

$(function(){
var _showImgW;
var _showImgH;
var _showImgMT;
var _showImgML;
$("#imgDiv").swipe({
swipeStatus:function(event, phase, direction, distance , duration , fingerCount) {
//$(this).find('#swipe_text').text("swiped " + distance + ' px');
if(phase === $.fn.swipe.phases.PHASE_END || phase === $.fn.swipe.phases.PHASE_CANCEL) {
//$(this).find('#swipe_text').text("No swipe was made");
}
if (phase == "start")
{
_showImgMT = $(this).find("._showImg").css("margin-top").replace("px", "");
_showImgML = $(this).find("._showImg").css("margin-left").replace("px", "");
}
if (direction == "up" && (phase == "cancel" || phase == "end")) {
//向上滑动 到顶
var mt = _showImgMT + duration;
//$(this).find("._showImg").css("margin-top",mt+"px");
}
else if (direction == "down" && (phase == "cancel" || phase == "end")) {
//向下滑动 到顶
var ml = _showImgML - duration;
//$(this).find("._showImg").css("margin-left",ml+"px");
}
else if (direction == "left" && (phase == "cancel" || phase == "end")) {
//向左滑动 到顶
var ml = _showImgML - duration;
//$(this).find("._showImg").css("margin-left",ml+"px");
}
else if (direction == "right" && (phase == "cancel" || phase == "end")) {
//向右滑动 到顶
var ml = _showImgML - duration;
//$(this).find("._showImg").css("margin-left",ml+"px");
}

if (direction == "up" && phase != "cancel" && phase != "end") {
//向上滑动过程中
var h = $(this).find("._showImg").height();
var mt = _showImgMT - duration;
if(get_height_for_window()-h>mt)
mt = get_height_for_window()-h;
//$(this).find("._showImg").css("margin-top",mt+"px");
$(this).find("._showImg").animate({ marginTop: mt + 'px' }, 100);
}
else if (direction == "down" && phase != "cancel" && phase != "end") {
//向下滑动过程中
_showImgMT = $(this).find("._showImg").css("margin-top").replace("px", "");
var mt = _showImgMT + duration;
if(mt<=0)
mt = 0;
//$(this).find("._showImg").css("margin-top",mt+"px");
$(this).find("._showImg").animate({ marginTop: mt + 'px' }, 100);
}
else if (direction == "left" && phase != "cancel" && phase != "end") {
//向左滑动过程中
var w = $(this).find("._showImg").width();
var ml = _showImgML - duration;
if(get_width_for_window()-w>ml)
ml = get_width_for_window()-w;
//$(this).find("._showImg").css("margin-left",ml+"px");
$(this).find("._showImg").animate({ marginLeft: ml + 'px' }, 100);
}
else if (direction == "right" && phase != "cancel" && phase != "end") {
//向右滑动过程中
_showImgML = $(this).find("._showImg").css("margin-left").replace("px", "");
var ml = _showImgML + duration;
if(ml<=0)
ml = 0;
//$(this).find("._showImg").css("margin-left",ml+"px");
$(this).find("._showImg").animate({ marginLeft: ml + 'px' }, 100);
}
},
pinchStatus:function(event, phase, direction, distance , duration , fingerCount, pinchZoom) {
if(phase == "start") {
_showImgW =$(this).find("._showImg").width();
_showImgH = $(this).find("._showImg").height();
}
if(direction=="in")
{ //pinchZoom 缩放比例
var w = _showImgW*pinchZoom;
var h = _showImgH*pinchZoom;
$(this).find("._showImg").css("width", w + 'px' );
$(this).find("._showImg").css("height", h + 'px' );
}
else if(direction=="out")
{
var w = _showImgW*pinchZoom;
var h = _showImgH*pinchZoom;
$(this).find("._showImg").css("width", w + 'px' );
$(this).find("._showImg").css("height", h + 'px' );
}
},
swipe:function(event, direction, distance, duration, fingerCount) {
//$(this).find('#swipe_text').text("You swiped " + direction + " with " + fingerCount + " fingers");
},
pinchIn:function(event, direction, distance, duration, fingerCount, pinchZoom) {
$(this).find('#pinch_text').text("You pinched " +direction + " by " + distance +"px, zoom scale is "+pinchZoom);
//ecg.alert(direction + " by " + distance +"px");
//$(this).find("._showImg").animate({ -duration + 'px' }, 0);
},
pinchOut:function(event, direction, distance, duration, fingerCount, pinchZoom) {
$(this).find('#pinch_text').text("You pinched " +direction + " by " + distance +"px, zoom scale is "+pinchZoom);
//ecg.alert(direction + " by " + distance +"px");
},
fingers:'all'
});
});