小结巴巴吧通过本文主要向大家介绍了jquery实现自定义图片裁剪功能【推荐】等相关知识,希望对您有所帮助,也希望大家支持linkedu.com www.linkedu.com
1.自定义宽高效果
1.html 代码 index.html
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> <script src="./jquery-1.12.4.min.js"></script> </head> <body> <img class="source" src="./test2.jpg" alt=""> <img src="" class="target" alt=""> </body> </html></div>
2.添加插件代码
(function ($) {
$.fn.photoCrop=function (option) {
var opt={
img:'',
fixedScale:9/5,
isHead:null,
maxWidth:'1400',
maxHeight:'800',
callBack:function () {}
}
opt=$.extend(opt,option);
var _this=this;
var imgSrc=opt.img ? opt.img:_this.attr('src');
var photoCropBox=$('<div id="photoCropBox" style="position: fixed;width: 100%;height: 100%;top: 0;left: 0;background: rgba(0,0,0,0.5);z-index: 99999;padding: 20px;">' +
'<canvas id="cropCanvas" style="position: absolute;opacity:1;left: 0;top: 0;z-index: 100"></canvas><img id="dataImg" src="'+imgSrc+'" style="opacity: 0;position: absolute" alt=""><div id="photoCropBox-panel-box" style="position: relative;width: 100%;height: 100%;">' +
'<div id="photoCropBox-panel" style="opacity:0;background: #eee;border-radius: 5px;max-width: '+opt.maxWidth+'px;max-height: '+opt.maxHeight+'px;position: absolute;text-align: center"><div id="photoCropBox-img" style="margin: 40px 60px 20px;display: inline-block;position: relative">' +
'<img src="'+imgSrc+'" style="max-width: 100%;display: block;max-height: 100%;max-height: '+(opt.maxHeight-110)+'px;" alt=""></div><div id="photoCropBox-option" style="text-align: right;padding-right: 50px;padding-bottom: 20px;position: relative;z-index: 2"><span id="photoCropBox-end">裁剪</span><span id="photoCropBox-start">手动裁剪</span><span id="photoCropBox-cancel">取消</span></div></div>' +
'</div></div>');
$('body').append(photoCropBox);
var _box=$('#photoCropBox-img');
var imgWidth=_box.find('img').width();
$('#photoCropBox-option span').css({
lineHeight:'30px',
background:'#000',
color:'#fff',
display:'inline-block',
paddingLeft:'20px',
paddingRight:'20px',
marginRight:'5px',
cursor:'pointer'
})
var cropBox=$('<div id="photoCropBox-cropBox" style="position: absolute;z-index: 5;cursor: Move;display: none">' +
'<div id="cropBoxLine" style="overflow: hidden;position: absolute;width: 100%;height: 100%;">' +
'<img src="'+imgSrc+'" style="display: block;width: '+_box.find('img').width()+'px;position: absolute;max-height: none;max-width: none" alt="">' +
'<div class="top line" style="width: 100%;height: 1px;top: 0;left: 0;"></div><div class="right line" style="height: 100%;width: 1px;top: 0;right: 0"></div>' +
'<div class="line bottom" style="width: 100%;height: 1px;bottom: 0px;left: 0"></div><div class="left line" style="height: 100%;width: 1px;top: 0;left: 0"></div></div>' +
'<div id="cropBoxLine2"><div class="left line2" style="height: 100%;width: 1px;top: 0;left: 0;cursor: w-resize"></div><div class="right line2" style="height: 100%;width: 1px;top: 0;right: 0;cursor: e-resize"></div><div class="top line2" style="width: 100%;height: 1px;top: 0;left: 0;cursor: n-resize;position: absolute"></div><div class="bottom line2" style="width: 100%;height: 1px;bottom: 0px;left: 0;cursor: s-resize"></div>' +
'<div class="left bot" style="left: -3px;top: 50%;margin-top: -4px;cursor: w-resize"></div><div class="right bot" style="right: -3px;top: 50%;margin-top: -4px;cursor: e-resize"></div><div class="bottom bot" style="bottom: -3px;left: 50%;margin-left: -4px;cursor: s-resize"></div><div class="top bot" style="top: -3px;left: 50%;margin-left: -4px;cursor: n-resize"></div>' +
'<div class="left-top bot" style="left: -3px;top: -3px;cursor: nw-resize"></div><div class="left-bottom bot" style="left: -3px;bottom: -3px;cursor: sw-resize"></div><div class="right-top bot" style="right: -3px;top: -3px;cursor: ne-resize"></div><div class="right-bottom bot"style="right: -3px;bottom: -3px;cursor: se-resize"></div></div></div>');
var screen=$('<div id="photoCropBox-bg" style="background: rgba(0,0,0,.5);position: absolute;left: 0;top: 0;width: 100%;height: 100%;z-index: 4;cursor: crosshair;display: none"></div>')
_box.append(cropBox);
_box.append(screen);
var _corp=$('#photoCropBox-cropBox');
var cropBoxLine=$('#cropBoxLine');
setTimeout(function () {
console.log(imgWidth)
cropBoxLine.find('img').css('width',_box.find('img').width()+'px')
},20)
if(opt.isHead){
cropBoxLine.css({borderRadius:'100%'})
}
$('#photoCropBox-cropBox .line,#photoCropBox-cropBox .line2').css({
background:'url(./img/Jcrop.gif)',
position:'absolute',
opacity:.5
})
$('#photoCropBox-cropBox .bot').css({
background:'rgba(0,0,0,0.5)',
position:'absolute',
width:7,
height:7,
border:'1px #999 solid'
})
setTimeout(function () {
init();
},10)
$(window).on('resize',function () {
setPosition();
})
$('#photoCropBox-cancel').on('click',function () {
closeBox();
})
$('#photoCropBox-bg').on('mousedown',function (e) {
if(opt.fixedScale) return //固定
$('#cropBoxLine2').hide();
var _this=$(this);
var _sx=e.pageX,_sy=e.pageY;
var _tx=_this.offset().left;
var _ty=_this.offset().top;
$(document).on('mousemove',function (e) {
e.preventDefault();
var _ex=e.pageX,_ey=e.pageY;
getPosition(_ex,_ey,_ty,_tx,_sx,_sy,_this)
})
$(document).on('mouseup',function () {
$(document).unbind('mousemove');
$('#cropBoxLine2').show();
})
})
var lock=false;
_corp.on('mousedown',function (e) {
if(lock){return}
var _sx=e.pageX,_sy=e.pageY;
var pW=$('#photoCropBox-bg').width(),pH=$('#photoCropBox-bg').height();
var _this=$(this),_thisX=parseInt(_this.css('left')),_thisY=parseInt(_this.css('top')),_thisW=parseInt(_this.css('width')),_thisH=parseInt(_this.css('height'));
$(document).on('mousemove',function (e) {
e.preventDefault();
var _ex=e.pageX,_ey=e.pageY;
var _x=_ex-_sx,_y=_ey-_sy;
_x+=_thisX;_y+=_thisY;
if(_x<0) _x=0;
if(_y<0) _y=0;
if(_y>pH-_thisH) _y=pH-_thisH;
if(_x>pW-_thisW) _x=pW-_thisW;
resizeCropBox("","",_y,_x,true)
})
$(document).on('mouseup',function () {
$(document).unbind('mousemove');
})
})
//控制大小
$('#cropBoxLine2 .bot').on("mousedown",function (e) {
lock=true;
var _esx=e.pageX,_esy=e.pageY;
var _that=$(this);
var _this=$('#photoCropBox-bg');
var _tx=_this.offset().left;
var _ty=_this.offset().top;
var _sx=_corp.offset().left,_sy=_corp.offset().top;//裁剪框
if(_that.hasClass('right-top')) _sy+=_corp.height();
if(_that.hasClass('left-top')){
_sy+=_corp.height();
_sx+=_corp.width();
}
if(_that.hasClass('left-bottom')) _sx+=_corp.width();
$(document).on('mousemove',function (e) {
e.preventDefault();
var _ex=e.pageX,_ey=e.pageY;
if(opt.fixedScale){
_ey=(_ex-_esx)/opt.fixedScale+_esy;
if(_that.hasClass('right-top') || _that.hasClass('left-bottom')){
_ey=(_esx-_ex)/opt.fixedScale+_esy;
}
}
getPosition(_ex,_ey,_ty,_tx,_sx,_sy,_this)
})
$(document).on('mouseup',function () {
$(document).unbind('mousemove');
lock=false;
})
}) $('#cropBoxLine2 .left,#cropBoxLine2 .top,#cropBoxLine2 .right,#cropBoxLine2 .bottom').o