先看点击图片后的效果，可以左右滑动，放大缩小
html
<div id='getRecord'> <img src="img/evl.png" alt=""> </div>
调用方式
// #getRecord是img标签的父元素，并不支持委托，所以当你的图片是新增的，需要再次调用以下代码，可以写成一个函数调用
$('#getRecord').FlyZommImg({
rollSpeed: 200,//切换速度
miscellaneous: false,//是否显示底部辅助按钮
closeBtn: true,//是否打开右上角关闭按钮
hideClass: 'hideImg',//不需要显示预览的 class
imgQuality: 'thumb',//图片质量类型 thumb 缩略图 original 默认原图
slitherCallback: function (direction, DOM) {//左滑动回调 两个参数 第一个动向 'left,firstClick,close' 第二个 当前操作DOM
setTimeout(function(){
// 为了一开始居中显示
$('.fly-zoom-box-img').css('width','100%').css('height','auto').css('top',0).css('bottom',0).css('margin','auto');
},300)
}
});
以下是fly-zomm-img.js，做了一些修改，也为了看到这篇文章的人方便做一些修改，所以不放压缩后的代码
var flyZommImg = function(b, a) {
this.options = a;
this._this = b;
this._activity = false;
this._opts = {
imgSum: 0,
rollSpeed: 200,
screenHeight: 165,
showBoxSpeed: 300,
urlProperty: false,
miscellaneous: true,
closeBtn: false,
hideClass: false,
imgQuality: "original",
slitherCallback: function() {}
}, this._init = function() {
var c = this;
c._defaluts();
c._bind()
}, this._defaluts = function() {
var c = $.extend(this._opts, this.options || {});
this.opts = c;
return c
}, this._bind = function() {
var c = this;
c._bindDom();
$("body").on("click", ".fly-zoom-box", function(d) {
c._hideBox()
});
$("body").on("click", ".fly-zoom-box-close", function(d) {
c._hideBox();
d.stopPropagation()
});
$("body").on("click", ".fly-zoom-box-restore", function(d) {
c._imgRestore("tap");
d.stopPropagation()
});
$("body").on("click", ".fly-zoom-box-zoomout", function(d) {
c._zommImg(-100, 1);
d.stopPropagation()
});
$("body").on("click", ".fly-zoom-box-zoom", function(d) {
c._zommImg(100, 1);
d.stopPropagation()
});
$("body").on("click", ".fly-zoom-box-img", function(d) {
// c._imgRestore("tap");
// d.stopPropagation()
});
$("body").on("click", ".fly-zoom-box-tool", function(d) {
d.stopPropagation()
});
$("body").on("click", ".fly-zoom-box-label", function(f) {
var d = $(this);
var h = d.html();
if(h && c.groups && c.groups[c.group_name]) {
c.group_name = h;
c.opts.imgSum = c.groups[c.group_name].length;
c.opts.img_index = 0;
$(".fly-zoom-box-fix").html(1);
$(".fly-zoom-box-length").html(c.opts.imgSum);
if(c.opts.urlProperty) {
var g = c.groups[c.group_name][0].dom.data(c.opts.urlProperty)
} else {
var g = c.groups[c.group_name][0].dom.attr("src")
}
$(".fly-zoom-box-img").attr("src", g);
$(".fly-zoom-box-label").css({
"background": "",
"color": "#666"
});
d.css({
"background": "rgba(62,69,80,1)",
"color": "#fff"
});
c.oWidth = c.oHeight = null;
c._imgRestore("oneSwitcher", c.groups[c.group_name][0].dom);
c.onPinch = c.onRotate = null
}
f.stopPropagation()
})
}, this._bindDom = function() {
var f = this;
f.opts.imgSum = 0;
f.opts.img_index = 1;
f.groups = [];
f.group_names = [];
f.group_show = false;
f._this.find("img").each(function(h) {
var g = $(this);
if((f.opts.hideClass && !g.hasClass(f.opts.hideClass)) || !f.opts.hideClass) {
var i = g.data("group");
if(i) {
if(!f.groups[i]) {
f.group_names.push(i);
f.groups[i] = []
}
f.groups[i].push({
"dom": g
});
f.group_show = true
}
if(!f.group_show) {
g.data("index", f.opts.imgSum);
f.opts.imgSum += 1
}
}
});
if(f.group_show) {
var e = f.group_names;
for(var d = 0; d < e.length; d++) {
for(var c = 0; c < f.groups[e[d]].length; c++) {
f.groups[e[d]][c].dom.attr("data-index", c)
}
}
}
this._this.find("img").on("click", function() {
var g = $(this);
if((f.opts.hideClass && !g.hasClass(f.opts.hideClass)) || !f.opts.hideClass) {
f._flyBoxHtml(g);
f._imgRestore("oneSwitcher", g);
$("body").on("touchmove", function(h) {
h.preventDefault()
});
f._touchBind(f);
if(f._activity) {
f.opts.slitherCallback("firstClick", g)
}
}
})
}, this._reload = function() {
$("body").unbind("touchmove");
this._this.find("img").unbind("click");
this._moveUnBind();
this._bindDom()
}, this._flyBoxHtml = function(j) {
var c = parseInt(j.data("index"));
if(this.group_show) {
this.group_name = j.data("group");
this.opts.imgSum = this.groups[this.group_name].length;
this.opts.img_index = c
}
var f = this.opts.imgSum;
if(this.opts.urlProperty) {
var h = j.data(this.opts.urlProperty)
} else {
var h = j.attr("src")
}
var e = "";
e += "<div class='fly-zoom-box' style='touch-action: none;display: none;-webkit-tap-highlight-color:rgba(255,255,255,0);cursor: pointer;position: fixed;z-index: 9999;width:100% ;height:100% ;background: rgba(20,20,20,1);top:0 ;bottom: 0;right:0 ;left:0 ;'>" + "<div class='fly-zoom-box-number' style='touch-action: none;z-index: 999999;position: absolute;top: 0;padding: 20px 0 ;line-height: 26px;color: #ddd;font-size: 14px;width: 100%;text-align: center;'><span style='background: rgba(255,255,255,0.2);border-radius: 15px;color: #fff;padding: 0px 6px'><span class='fly-zoom-box-fix'>" + (c + 1) + "</span>/<span class='fly-zoom-box-length'>" + f + "</span></span></div>" + "<div class='fly-zoom-box-main' style='touch-action: none;z-index: auto;position: relative;width: 100%;height: 100%;overflow: auto'><img class='fly-zoom-box-img' data-index='" + c + "' style='touch-action: none;display: block;width: 100%;position: absolute;' src='" + h + "'></div>";
if(this.opts.closeBtn) {
e += "<div class='fly-zoom-box-close' style='touch-action: none;text-align: center;z-index: 99999999;position: absolute;top: 11px;color: #ddd;font-size: 26px;right: 14px;'>×</div>"
}
if(this.opts.miscellaneous && this.group_names.length == 0) {
e += "<div class='fly-zoom-box-tool' style='touch-action: none;z-index: 999999;position: absolute;bottom: 10px;padding: 10px 0 ;width: 200px;line-height: 26px;color: #ddd;font-size: 14px;margin: 0 auto;right: 0;left: 0;text-align: center;background: rgba(20,20,20,0.3);border-radius: 50px'><span class='fly-zoom-box-zoomout' style='background: rgba(255,255,255,0.2);border-radius: 15px;color: #fff;padding: 0px 6px'>－</span><span class='fly-zoom-box-restore' style='background: rgba(255,255,255,0.2);border-radius: 15px;color: #fff;padding: 2px 6px;margin: 0 0 0 10px '>还原</span><span class='fly-zoom-box-close' style='background: rgba(255,255,255,0.2);border-radius: 15px;color: #fff;padding: 2px 6px;margin: 0 10px'>关闭</span><span class='fly-zoom-box-zoom' style='background: rgba(255,255,255,0.2);border-radius: 15px;color: #fff;padding: 0px 6px'>＋</span></div>"
}
if(this.group_names.length > 0 && this.opts.miscellaneous) {
e += "<div class='fly-zoom-box-tool' style='touch-action: none;text-align: center;z-index: 999999;position: absolute;bottom: 10px;padding: 10px 0 ;line-height: 26px;color: #ddd;font-size: 12px;margin: 0 auto;right: 0;left: 0;background: rgba(20,20,20,0.3);'>";
var g = this.group_names;
for(var d = 0; d < g.length; d++) {
e += "<span class='fly-zoom-box-label' style='width: max-content;border-radius: 5px;display: inline-block;";
if(g[d] == this.group_name) {
e += "background: rgba(62,69,80,1);color: #fff;"
} else {
e += "color: #666;"
}
e += "padding: 2px 9px;margin: 5px 10px 0 10px'>" + g[d] + "</span>"
}
}
e += "</div>";
$("body").append(e);
this._showBox()
}, this._hideBox = function() {
$(".fly-zoom-box").hide(this._opts.showBoxSpeed, "linear", function() {
$(this).remove()
});
$("body").unbind("touchmove");
if(this._activity) {
this.opts.slitherCallback("close", $(".fly-zoom-box-img"))
}
this._moveUnBind();
this._activity = false
}, this._showBox = function() {
this._activity = true;
$(".fly-zoom-box").show(this._opts.showBoxSpeed)
}, this._rightMove = function() {
var e = this;
if(e.group_show) {
var c = e.opts.img_index + 1;
var d = e.opts.imgSum;
if(c >= d) {
c = 0
}
e.opts.img_index = c;
var g = e.groups[e.group_name][c].dom
} else {
var c = parseInt($(".fly-zoom-box-img").attr("data-index"));
c = c + 1;
var d = this.opts.imgSum;
if(c >= d) {
c = 0
}
var g = "";
this._this.find("img").each(function() {
var h = $(this);
if(h.data("index") == c) {
g = h;
return false
}
})
}
$(".fly-zoom-box-fix").html(c + 1);
$(".fly-zoom-box .fly-zoom-box-img").animate({
left: "-200%"
}, e._opts.rollSpeed, "linear", function() {
$(this).remove()
});
if(e.opts.urlProperty) {
var f = g.data(e.opts.urlProperty)
} else {
var f = g.attr("src")
}
$(".fly-zoom-box-main").append("<img class='fly-zoom-box-img' data-index='" + c + "' style='left:100%;display: block;position: absolute;' src='" + f + "'>");
e._imgRestore("chage", g);
$(".fly-zoom-box-img").animate({
left: "0%"
}, e._opts.rollSpeed, "linear", function() {
e._touchBind(e);
e._imgRestore("switcher", g)
});
this._moveUnBind(c);
if(this._activity) {
this.opts.slitherCallback("left", g)
}
}, this._leftMove = function() {
var e = this;
if(e.group_show) {
var c = e.opts.img_index - 1;
var d = e.opts.imgSum;
if(c < 0) {
c = (d - 1)
}
e.opts.img_index = c;
var g = e.groups[e.group_name][c].dom
} else {
var c = parseInt($(".fly-zoom-box-img").attr("data-index"));
c = c - 1;
var d = this.opts.imgSum;
if(c < 0) {
c = (d - 1)
}
var g = "";
this._this.find("img").each(function() {
var h = $(this);
if(h.data("index") == c) {
g = h;
return false
}
})
}
$(".fly-zoom-box-fix").html(c + 1);
$(".fly-zoom-box-main .fly-zoom-box-img").animate({
left: "200%"
}, e._opts.rollSpeed, "linear", function() {
$(this).remove()
});
if(e.opts.urlProperty) {
var f = g.data(e.opts.urlProperty)
} else {
var f = g.attr("src")
}
$(".fly-zoom-box-main").append("<img class='fly-zoom-box-img' data-index='" + c + "' style='right:100%;display: block;position: absolute;' src='" + f + "'>");
e._imgRestore("chage", g);
$(".fly-zoom-box-img").animate({
right: "0%"
}, e._opts.rollSpeed, "linear", function() {
e._touchBind(e);
e._imgRestore("switcher", g)
});
this._moveUnBind();
if(e._activity) {
this.opts.slitherCallback("right", g)
}
}, this._moveUnBind = function() {
$("body").unbind("touchstart");
$("body").unbind("touchend")
}, this._touchBind = function(c) {
var e, d;
$("body").on("touchstart", function(i) {
var f = i.originalEvent.touches ? i.originalEvent.touches[0] : i;
c.startX = f.pageX;
c.startY = f.pageY;
window.clearTimeout(c.longTapTimeout);
if(i.originalEvent.touches.length > 1) {
var g = i.originalEvent.touches[1];
var j = Math.abs(g.pageX - c.startX);
var h = Math.abs(g.pageY - c.startY);
c.touchDistance = c._getDistance(j, h);
c.touchVector = {
x: g.pageX - c.startX,
y: g.pageY - c.startY
}
} else {
c.startTime = c._getTime();
c.longTapTimeout = setTimeout(function() {
c._emitEvent("longtap")
}, 800);
if(c.previousTouchPoint) {
if(Math.abs(c.startX - c.previousTouchPoint.startX) < 10 && Math.abs(c.startY - c.previousTouchPoint.startY) < 10 && Math.abs(c.startTime - c.previousTouchTime) < 500) {
c._emitEvent("doubletap")
}
}
c.previousTouchTime = c.startTime;
c.previousTouchPoint = {
startX: c.startX,
startY: c.startY
}
}
});
$("body").on("touchmove", function(o) {
var p = c._getTime();
if(o.originalEvent.touches.length > 1) {
if(c.touchVector) {
var g = {
x: o.originalEvent.touches[1].pageX - o.originalEvent.touches[0].pageX,
y: o.originalEvent.touches[1].pageY - o.originalEvent.touches[0].pageY
};
var k = c._getRotateAngle(g, c.touchVector);
if(k > 30) {
c._emitEvent("rotate");
c.touchVector.x = g.x;
c.touchVector.y = g.y
} else {
var j = Math.abs(o.originalEvent.touches[0].pageX - o.originalEvent.touches[1].pageX);
var f = Math.abs(o.originalEvent.touches[1].pageY - o.originalEvent.touches[1].pageY);
var n = c._getDistance(j, f);
if(c.touchDistance) {
var h = n / c.touchDistance;
var i = h - c.previousPinchScale;
c._emitEvent("pinch", {
scale: i
});
c.previousPinchScale = h
}
}
}
} else {
window.clearTimeout(c.longTapTimeout);
var q = o.originalEvent.touches ? o.originalEvent.touches[0] : o;
var m = c.moveX === null ? 0 : q.pageX - c.moveX;
var l = c.moveY === null ? 0 : q.pageY - c.moveY;
c._emitEvent("move", {
"deltaX": m,
"deltaY": l
});
c.moveX = q.pageX;
c.moveY = q.pageY
}
o.preventDefault()
});
$("body").on("touchend", function(g) {
window.clearTimeout(c.longTapTimeout);
var f = c._getTime();
e = c.moveX - c.startX;
d = c.moveY - c.startY;
if(c.moveX !== null && Math.abs(e) > 10 || c.moveY !== null && Math.abs(d) > 10) {
if(Math.abs(e) > Math.abs(d) && e > 70) {
c._emitEvent("left")
} else {
if(Math.abs(e) > Math.abs(d) && e < -70) {
c._emitEvent("right")
} else {
if(Math.abs(d) > Math.abs(e) && d > 70) {
c._emitEvent("bottom")
} else {
if(Math.abs(d) > Math.abs(e) && d < -70) {
c._emitEvent("top")
} else {
if(f - c.startTime < 500) {
c._emitEvent("swipe")
}
}
}
}
}
} else {
if(f - c.startTime < 2000) {
if(f - c.startTime < 500) {
c._emitEvent("tap")
}
}
}
c._emitEvent("touchend")
})
}, this._zommImg = function(y, c) {
if(c <= 0) {
if(isNaN(y) || Math.abs(y) > 0.2 || Math.abs(y) < 0.02) {
return false
}
}
var l = $(".fly-zoom-box-img");
var k = l.width();
var v = l.height();
var f = window.screen.width;
var z = window.screen.height - this._opts.screenHeight;
if(c <= 0) {
y = y * 2;
var i = k + k * y;
var r = v + v * y;
var g = (f - i) / 2;
var s = (z - r) / 2
} else {
var i = k + y;
var r = v * (i / k);
// if(i < f) {
// return false
// }
if(y > 0) {
this.onPinch = true
}
var g = (f - i) / 2;
var s = (z - r) / 2
}
var e = "";
var d = "";
if(this._opts.imgQuality == "original") {
e = l[0].naturalWidth;
d = l[0].naturalHeight
} else {
e = l[0].width;
d = l[0].height
}
var q = document.body.offsetWidth;
var m = 50;
var j = (z - d) / 2;
if(j <= m) {
j = 70
}
var u = e;
var p = d;
var x = q / u;
var t = u / p;
if(t < 1) {
var n = z / d * 0.8;
u = u * n;
p = p * n;
if(u < (f * 0.75)) {
u = u * (1 - u / (f * 0.75) + 1);
p = p * (1 - p / (z * 0.75) + 1)
}
x = 1
}
// if(i < u * x) {
// console.log(5555)
// return false
// }
l.width(i);
l.height(r);
l.css({
"top": s + "px",
"left": g + "px"
});
return l
}, this._getTime = function() {
return new Date().getTime()
}, this._getDistance = function(d, c) {
return Math.sqrt(d * d + c * c)
}, this._getRotateDirection = function(d, c) {
return d.x * c.y - c.x * d.y
}, this._getRotateAngle = function(i, g) {
var j = this._getRotateDirection(i, g);
j = j > 0 ? -1 : 1;
var e = this._getDistance(i.x, i.y);
var d = this._getDistance(g.x, g.y);
var f = e * d;
if(f === 0) {
return 0
}
var c = i.x * g.x + i.y * g.y;
var h = c / f;
if(h > 1) {
h = 1
}
if(h < -1) {
h = -1
}
return Math.acos(h) * j * 180 / Math.PI
}, this._setNumber = function(k, i, h, m, l) {
var j;
var p;
if(k) {
if(this._opts.imgQuality == "original") {
j = k[0].naturalWidth;
p = k[0].naturalHeight
} else {
j = k[0].width;
p = k[0].height
}
}
var c = (h - p) / 2;
if(c <= m) {
c = 70
}
var n = j;
var d = p;
var g = l / n;
var f = n / d;
if(f < 1) {
var e = h / p * 0.8;
n = n * e;
d = d * e;
if(n < (i * 0.75)) {
n = n * (1 - n / (i * 0.75) + 1);
d = d * (1 - d / (h * 0.75) + 1)
}
g = 1
}
return {
"per": g,
"dwidth": n,
"dheight": d,
"ch": c
}
}, this._imgRestore = function(m, j) {
var l = this;
l.cdomthis = j;
var f = $(".fly-zoom-box-img");
var g = window.screen.width;
var e = window.screen.height - l._opts.screenHeight;
var o = (g - l.oWidth) / 2;
var i = (e - l.oHeight) / 2;
var k = document.body.offsetWidth;
var d = document.body.offsetHeight;
var n = 50;
if(m == "tap") {
f.css({
"top": l.oTop + "px",
"width": l.oWidth + "px",
"height": l.oHeight + "px",
"margin": "0 auto",
"right": "0%",
"left": "0%"
});
l.onPinch = l.onRotate = null
} else {
if(m == "chage") {
var c = l._setNumber(j, g, e, n, k);
f.css({
"top": c.ch + "px",
"width": c.dwidth * c.per + "px",
"height": c.dheight * c.per + "px",
"margin": "0 auto"
});
l.oTop = c.ch;
l.oWidth = c.dwidth * c.per;
l.oHeight = c.dheight * c.per
} else {
if(m == "touchend") {
if(f.width() < l.oWidth) {
var c = l._setNumber(j, g, e, n, k);
f.animate({
"top": c.ch + "px",
"width": c.oWidth + "px",
"height": c.oHeight + "px",
"margin": "0 auto",
"right": "0%",
"left": "0%"
}, 80, "linear", function() {
l.onPinch = l.onRotate = null
})
}
} else {
if(m == "switcher" || m == "oneSwitcher") {
if(m == "oneSwitcher") {
var c = l._setNumber(j, g, e, n, k);
f.css({
"top": c.ch + "px",
"width": c.dwidth * c.per + "px",
"height": c.dheight * c.per + "px",
"margin": "0 auto",
"right": "0%",
"left": "0%"
});
l.oTop = c.ch;
l.oWidth = c.dwidth * c.per;
l.oHeight = c.dheight * c.per
} else {
f.css({
"right": "0%",
"left": "0%"
})
}
}
}
}
}
}, this._emitEvent = function(d, j) {
var i = this;
switch(d) {
case "tap":
break;
case "doubletap":
i.onDoubletap = true;
break;
case "longtap":
i.onLongtap = true;
break;
case "swipe":
i.onSwipe = true;
break;
case "move":
if(i.onPinch) {
i.onMove = true;
var e = $(".fly-zoom-box-img");
var h = parseInt(e.css("top"));
var g = parseInt(e.css("left"));
var c = h + j.deltaY;
var f = g + j.deltaX;
e.css({
"top": c + "px",
"left": f + "px"
})
}
break;
case "pinch":
i.onPinch = true;
i.isPinch = true;
i._zommImg(j.scale, 0);
break;
case "rotate":
i.isRotate = true;
i.onRotate = true;
break;
case "left":
if(!i.onPinch && !i.onRotate) {
i.onLeft = true;
i._leftMove()
}
break;
case "right":
if(!i.onPinch && !i.onRotate) {
i.onRight = true;
i._rightMove()
}
break;
case "top":
if(!i.onPinch && !i.onRotate) {
i.onTop = true
}
break;
case "bottom":
if(!i.onPinch && !i.onRotate) {
i.onBottom = true
}
break;
case "touchend":
i._imgRestore("touchend", i.cdomthis);
i.isPinch = i.isRotate = i.startX = i.startY = i.moveX = i.moveY = i.touchDistance = null;
i.previousPinchScale = 1;
break
}
}
};
$.fn.FlyZommImg = function(a) {
var b = new flyZommImg(this, a);
b._init();
return b
};
来源：https://www.cnblogs.com/kewenxin/p/10833337.html