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基于zepto.js简单实现上传图片

2016-06-21 14:32 776 查看

效果如下：

html:

<div class="otherPic">
<div id="showOtherImage"></div>
<span class="pull-left position_relative" id="openIdCardImg">
<span class="icon color-blue addPic"></span>
<input type="file" class="yy_inputFile" 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 class="position_relative display-inlineBlock" style="float:left;">' +
'<img src="' + img_arr[len] + '">' +
'<span class="icon deletedImages" 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 class="position_relative display-inlineBlock" style="float:left;">' +
'<img src="' + img_arr[i] + '">' +
'<span class="icon deletedImages" 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，也希望大家多多支持脚本之家。

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