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标题 基于zepto.js简单实现上传图片
内容
    这篇文章主要介绍了基于zepto.js简单实现上传图片的相关资料,需要的朋友可以参考下
    效果如下:
    名单
    html: 
    <div>
        <div id="showOtherImage"></div>
        <span id="openIdCardImg">
        <span></span>
        <input type="file" id="other_inputFile" name="reasonImg" />
        </span>
       </div>
    .basicInfo .item{ padding:.5rem .5rem 0; border-top:.3rem solid #eeeeee;}
    .basicInfo li{ overflow:hidden; margin-bottom:.5rem;line-height:2.1rem; border-bottom:1px solid #e3e3e3;}
    .basicInfo li:last-child{ border-bottom:none;}
    .basicInfo input[type="text"]{ height:2rem; line-height:2rem;}
    .basicInfo textarea{ height:8rem; line-height:1.5rem;}
    .basicInfo .otherPic{ min-height:3rem;}
    .basicInfo .otherPic .addPic{ height:3rem; line-height:3rem; font-size:3rem; margin-bottom:.5rem;}
    .basicInfo .otherPic img{ margin:0 .5rem .5rem 0; width:3rem; height:3rem; vertical-align:top; border:1px solid #ddd;}
    .basicInfo .yy_inputFile{ position:absolute; top:0; left:0; width:3rem; height:3rem; opacity:0;}
    .basicInfo .aboutPic{ margin-bottom:.5rem; line-height:1.5rem; }
    js: 
    var img_arr = new Array();
     //相关图片
     $(page).on('change','#other_inputFile',function () {
      $(this).resizeImage({
      that:this,
      cutWid:'',
      quality:0.6,
      limitWid:710,
      success:function (data) {
       var len = $('#showOtherImage').find('img').size();
       img_arr[len] = data.base64;
       var img = '<div>' +
       '<img src="' + img_arr[len] + '">' +
       '<span sid="' +len+ '" id="other_img_'+len+'"></span>'+
       '</div>';
       $('#showOtherImage').append(img);
       if(img_arr.length == 9){
       $('#openIdCardImg').hide();
       return false;
       }
      }
      });
      this.value = '';
     });
     //删除相关图片
     $(page).on('click','.deletedImages',function () {
      var sid = $(this).attr('sid');
      img_arr.splice(sid,1);
      $(this).parent().remove();
      $('#showOtherImage').html('');
      for( var i=0; i < img_arr.length; i++) {
      var img = '<div>' +
       '<img src="' + img_arr[i] + '">' +
       '<span sid="' +i+ '" id="other_img_' +i+ '"></span>'+
       '</div>';
      $('#showOtherImage').append(img);
      }
      if(img_arr.length < 9){
      $('#openIdCardImg').show();
      }else{
      $('#openIdCardImg').hide();
      }
     });
    /*
     * 裁剪图片
     * $(id).resizeImage({
     * that:this, //当前图片对象
     * cutWid:'', //裁剪尺寸
     * quality:0.6, //图片质量0~1
     * limitWid:400, //最小宽度
     * success:function (data) {
     * do something... 
     * }
     * })
     *
     * */
     $.fn.resizeImage = function (obj) {
     var file = obj.that.files[0];
     var URL = window.URL || window.webkitURL;
     var blob = URL.createObjectURL(file);
     var base64;
     var img = new Image();
     img.src = blob;
     if(!/image\/\w+/.test(obj.that.files[0].type)){
      $.toast("请上传图片!",1000);
      return false;
     }
     img.onload = function() {
      if(img.width < obj.limitWid){
      $.toast('图片宽度不得小于'+ obj.limitWid +'px',1000);
      return false;
      }
      var that = this;
      //生成比例
      var w,scale,h = that.height;
      if(obj.cutWid == ''){
      w = that.width;
      }else{
      w = obj.cutWid;
      }
      scale = w / h;
      h = w / scale;
      //生成canvas
      var canvas = document.createElement('canvas');
      var ctx = canvas.getContext('2d');
      $(canvas).attr({
      width: w,
      height: h
      });
      ctx.drawImage(that, 0, 0, w, h);
      // 生成base64
      base64 = canvas.toDataURL('image/jpeg', obj.quality || 0.8);
      var result = {
      base64:base64
      };
      //成功后的回调
      obj.success(result);
     };
     };
    以上就是本文的全部内容,希望对大家的学习有所帮助
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更新时间:2025/5/19 19:21:11