vue 上传图片 input=file
一、逻辑
点击li触发事件chooseImage 即触发input标签事件photoChange
input标签事件photoChange
file返回的是如下变量
模拟上传表单方法
执行上传
二、代码
<li class="scroll-item first-item" @click="chooseImage"><i class="iconPhoto"></i>
<span class="title">拍照</span>
<input @change="photoChange($event)" type="file" id="upload_file" multiple style="display: none"/>
</li>
chooseImage(){document.getElementById('upload_file').click(); //触发input-file文件上传控件 事件photoChange
},
photoChange(el) {
var file = el.target.files[0];//name: "dangqi1.png" || type: "image/png"
var type = file.type.split('/')[0];
if ( type === 'image' ){
//将图片img转化为base64
var reader = new FileReader();
reader.readAsDataURL(file);
var that = this;
reader.onloadend = function () {
var dataURL = reader.result;
var blob = that.dataURItoBlob(dataURL);
that.upload(blob); //执行上传接口
};
}else{
alert('上传了非图片');
}
},
dataURItoBlob (dataURI) {
// base64 解码
let byteString = window.atob(dataURI.split(',')[1]);
let mimeString = dataURI.split(',')[0].split(':')[1].split(';')[0];
let T = mimeString.split('/')[1];
let ab = new ArrayBuffer(byteString.length);
let ia = new Uint8Array(ab);
for (let i = 0; i < byteString.length; i++) {
ia[i] = byteString.charCodeAt(i);
}
return new Blob([ab], {type: mimeString});
},
upload(imgUrl){
var formdata = new FormData();
formdata.append('file',imgUrl);//下面是要传递的参数
axios.post("http://xxx.com/api/file",
formdata,
{headers:{'Content-Type':'multipart/form-data'}}
).then((res)=>{
if(res.data.code === 200){
alert('成功上传!');
this.postimg = res.data.data.url;
}else if(res.data.code === 401){
alert('未登录')
}else if(res.data.code === 403){
alert('未授权')
}else if(res.data.code === 422){
alert('验证失败信息')
}else if(res.data.code === 500){
alert('系统错误')
}
})
},
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