報(bào)錯(cuò)：ERROR TypeError: Failed to execute 'readAsDataURL' on 'FileReader': parameter 1 is not of type 'Blob'.這是用ionic寫(xiě)的\\xx.html<input type="file" (change)="selectImage(this.files)" accept="image/jpeg,image/png,image/jpg">\\xx.tsselectImage(file){      var reader = new FileReader();      reader.onload = function(file){        // console.log(evt.currentTarget)      }      reader.readAsDataURL(file);      console.log(reader.readAsDataURL(file));    }