从imagePickerController更改单元格的backGroundColor

Question

告诉我如何从imagePickerController函数更改单元格的backGroundColor：

func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
        self.dismiss(animated: true, completion: nil)
        //let imageUser = info[UIImagePickerController.InfoKey.editedImage] as! UIImage

        let indexPath = IndexPath(item: 0, section: 0)
        let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "cellRegisterMarket", for: indexPath) as! cellRegisterMarket
        cell.backgroundColor = .red
}

Answer 1

替换此

$func = 'set'.$field;

使用

let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "cellRegisterMarket", for: indexPath) as! cellRegisterMarket

这不是一个好方法，更新模型并重新加载集合

Answer 2

您应该尝试以下方法：

let indexPath = IndexPath(item: 0, section: 0)
let cell = collectionView.cellForItemAtIndexPath(indexPath) as! cellRegisterMarket
cell.backgroundColor = .red