<u-upload:fileList="fileList3"@afterRead="afterRead"@delete="deletePic"name="3"multiple:maxCount="10":previewFullImage="true"
></u-upload>
其中,afterRead,deletePic方法,必须写成afterRead3,deletePic3,要和名称对应!
否则报错let fileListLen = this[`fileList1${event.name}`].length vue里这句总是报错,Uncaught (in promise) TypeError: Cannot read properties of undefined (reading 'length')