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Jcrop图片裁剪+canvas+thinkphp
发布时间:2019-01-09 09:21:42 修改时间:2019-01-09 09:26:09 阅读:4576 评论:0 0
演示效果请看本站的个人中心头像上传
前端代码:
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>图像裁剪-Jcrop</title> </head> <body> <div class="reHeaderImg"> <!-- <form action="{:U('User/reg')}" method="post"> --> <div class="form-group"> <div class="image-editor"> <input type="file" id="cropit-image-input" onchange="imgChange(this)"> <div style="overflow:hidden"> <div class="cropit-preview"></div> <!-- 这是另一个表单,用来上传图片和其他内容 --> <form class="form-horizontal" style="float:right" role="form" method="post" onsubmit="return validate();" action="${pageContext.request.contextPath }/business/product/add.action"> <!-- 裁剪后的图片 --> <div class="form-group namediv"> <label class="col-sm-2" for="name" style="font-size: 15px;"></label> <div class="col-sm-6"> <div style="width: 100px; height: 100px; border: 1px solid black; overflow:hidden"> <!-- <img src="" id='oldConvas_img' width="100px" height="100px" alt=""> --> <canvas id="oldConvas" width="100px" height="100px"></canvas> </div> </div> </div> <!-- 其他表单内容,不写了 --> </form> </div> <form action="{:U('User/changePic')}" method="post" id="picSubmit" onsubmit="return checkCoords();"> <input type="hidden" id="x" name="x" /> <input type="hidden" id="y" name="y" /> <input type="hidden" id="w" name="w" /> <input type="hidden" id="h" name="h" /> <input type="hidden" class="photoStream" id="photoStream" name="photoStream" /> </form> <!-- <input type="file" class="photo" id="photo" name="photo" onchange="openPhotoCut();" /> --> </div> </div> <div class="form-group"> <button class="btn btn-sm btn-white" onclick='reHeaderImg_submit(this,"{$_SESSION['mid']}")' type="button">确认修改</button> </div> </div> <script type="text/javascript" src=" http://www.no-if.com/Public/Index/js/jquery.js"></script> <script type="text/javascript" src=" http://www.no-if.com/Public/Index/js/pic_cut/js/jquery.Jcrop.min.js"></script> <script type="text/javascript"> function cropbox(url){ $('#cropbox').Jcrop({ // start off with jcrop-light class bgOpacity: 0.5, bgColor: '#000', addClass: 'jcrop-normal', allowResize: 'false', aspectRatio: 1, onSelect: updateCoords, onChange: updateCoords },function(){ api = this; api.setSelect([0,0,0+100,0+100]); api.setOptions({ bgFade: true }); api.ui.selection.addClass('jcrop-selection'); }); } function updateCoords(c) { $('#x').val(c.x); $('#y').val(c.y); $('#w').val(c.w); $('#h').val(c.h); //更新canvas画板内容 var img=document.getElementById("cropbox"); var ct=document.getElementById("oldConvas"); var ctx=ct.getContext("2d"); //清空画板 ctx.clearRect(0,0, ct.width, ct.height); //.drawImage(图像对象,原图像截取的起始X坐标,原图像截取的起始Y坐标,原图像截取的宽度,原图像截取的高度, //绘制图像的起始X坐标,绘制图像的起始Y坐标,绘制图像所需要的宽度,绘制图像所需要的高度); ctx.drawImage(img, c.x, c.y, c.w, c.h,0,0,100,100); // 画出图片,尺寸100x100 var newImg = ct.toDataURL("image/jpeg"); // 获得图片流 $(".photoStream").val(newImg); // 将图片字符流存储在input中 // layer.closeAll(); // 关闭所有窗口 }; function checkCoords() { if (parseInt($('#w').val())) return true; alert('Please select a crop region then press submit.'); return false; }; function imgChange(e){ var url = window.URL.createObjectURL(document.getElementById('cropit-image-input').files[0]); $('#oldConvas_img').attr('src',url) $('.cropit-preview').html("<img src="+url+" style='margin:0 auto;' id='cropbox' />"); cropbox(url); } function reHeaderImg_submit(e,uid){ if (parseInt($('#w').val())) { // return true ; } else{ layer.msg('请先截取头像'); return false; } // var imageData = $('.image-editor').Jcrop('export'); // console.log($('#picSubmit').serialize()); var x = $("#x").val(); var y = $("#y").val(); var w = $("#w").val(); var h = $("#h").val(); if (x == 0 || y == 0 || w == 0 || h == 0) { alert("请裁剪图像"); } var ct=document.getElementById("oldConvas"); var newImg = ct.toDataURL("image/jpeg"); // 获得图片流 $.ajax({ type: "POST", url: "{:U('User/changePic')}", data:{'data':newImg}, dataType:'json', success: function(msg){ if(msg =='1'){ layer.msg(msg.message) }else{ layer.msg(msg.message) } } }); } </script> <style type="text/css"> .reHeaderImg { background-color: #ccc; width: 500px; height: 330px; font-size: 24px; display: block; } </style> </body> </html>
thinkphp:
/*改变头像*/
public function changePic(){
// 判断权限
if($_SESSION['muser']==null || $_SESSION['muser']== ''){
$this->error("非法操作",U('Index/index'));
}
// 检测是否是base64编码
if (preg_match('/^(data:\s*image\/(\w+);base64,)/', $_POST['data'], $result)){
$type = $result[2];
$id = $_SESSION['mid'];
// 文件存储路径
$new_file = "./Public/Uploads/UserPic/{$id}.{$type}";
// 验证文件格式
if(!in_array($type,array('jpg', 'gif', 'png', 'jpeg'))){
AD('2','图片格式错误');
}else{
// base64解码
$info = str_replace($result[1], '', $_POST['data']);
$info = base64_decode($info);
// 存储文件
if (file_put_contents($new_file, $info)){
$m = M('user');
$id = $_SESSION['mid'];
// 更新文件
$result = $m->where("id={$id}")->setField('pic',"./Public/Uploads/UserPic/{$id}.{$type}");
AD('1','修改成功');
}else{
AD('2','修改失败');
}
}
}
}
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