1.使用vue-cropper软件进行图片裁剪时，无法多次选取同一张图片（无法触发change事件），原因是，input框的value没有改变，所以没有触发：在上传后添加 $('#uploads').val('');将input框value清除，就解决了

 <label class="btn" for="uploads">上传图片</label>
                    <input type="file" id="uploads" style="position:absolute; clip:rect(0 0 0 0);display: flex;flex-direction: row"
                           accept="image/png, image/jpeg, image/gif, image/jpg"
                           @change="editUploadImg($event, 1)" />

editUploadImg(e, num) {
                var file = e.target.files[0];
                this.headEditVisable=true
                if (!/\.(gif|jpg|jpeg|png|bmp|GIF|JPG|PNG)$/.test(e.target.value)) {
                    alert('图片类型必须是.gif,jpeg,jpg,png,bmp中的一种');
                    return false;
                }
                var reader = new FileReader();
                reader.onload = (e) => {
                    let data;
                    if (typeof e.target.result === 'object') {

                        data = window.URL.createObjectURL(new Blob([e.target.result]));
                    } else {
                        data = e.target.result;
                    }
                    if (num === 1) {
                        this.editOption.img = data;
                    } else if (num === 2) {
                        this.example2.img = data;
                    }
                };
                reader.readAsDataURL(file);
//在上传后添加 $('#uploads').val('');将input框value清除，就解决了
                $('#uploads').val('');
                // reader.readAsArrayBuffer(file);
            },