将'NSNumber'桥接到'Int'警告

这是警告我应该关注的吗？

如果是这样,什么是解决方案？这是我的功能:

 override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
    if let destination = segue.destination as? ProfileViewController{
    let cell = sender as! UITableViewCell
        let selectedRow = myTableView.indexPath(for: cell)!.row


        switch (mySegmentedControl.selectedSegmentIndex){
        case 0:
            destination.nameVar = userSFList[selectedRow].name!
            destination.imageOneURL= userSFList[selectedRow].image!
            destination.bioVar = userSFList[selectedRow].bio!

            if let image2 = userSFList[selectedRow].imageTwo  {
               destination.imageTwoUrl = image2                }

            if let cOntactInt= userSFList[selectedRow].contact as? Int {
                destination.cOntact= contactInt
            }

            break

        case 1:

            destination.nameVar = userEBList[selectedRow].name!
            destination.imageOneURL= userEBList[selectedRow].image!
             destination.imageTwoUrl = userEBList[selectedRow].imageTwo!



            if let cOntactInt= userEBList[selectedRow].contact as? Int {
                destination.cOntact= contactInt
            }


            break
        case 2:
            destination.nameVar = userSFOList[selectedRow].name!
            destination.imageOneURL= userSFOList[selectedRow].image!

            if let cOntactInt= userSFOList[selectedRow].contact as? Int {
                destination.cOntact= contactInt
            }

            break
        case 3:
            destination.nameVar = userSJList[selectedRow].name!
            destination.imageOneURL= userSJList[selectedRow].image!
                     if let cOntactInt= userSJList[selectedRow].contact as? Int {
                destination.cOntact= contactInt
            }
            break
        default:
            break

    }
}

}

我正在使用具有四个不同段的分段控件并使用firebase提取数据.

我的个人规则始终 是零警告.
比抱歉更安全.

是contact一个Optional？如果是这样...

您可以使用Optional Binding:

if let cOntactInt= userSFOList[selectRow].contact as? Int {
  destination.cOntact= contactInt
}

或者Nil-Coalescing运算符:

destination.cOntact= userSFOList[selectedRow].contact.intValue ?? 

您也可以guard像@ Kamil.S所指出的那样使用,例如:

guard let nameVar = userSFOList[selectedRow].name,
  let imageVar = userSFOList[selectedRow].image,
  let cOntactVar= contact as? Int else {
    // Conditions were failed. `return` or `throw`.
  }

destination.nameVar = nameVar
destination.imageOneURL= imageVar
destination.cOntact= contactVar