Question

我在表格视图中有自定义单元格。当我运行我的代码时，我正在

低于错误

fatal error: unexpectedly found nil while unwrapping an Optional value
(lldb)

我的代码如下：

class viewCompanyResultController: UIViewController, UITableViewDataSource, UITableViewDelegate    {

  @IBOutlet var uiTblCompanyResultView: UITableView!
  var companyName=""
  var countryCode=""
  var townCode=""
  var element=""

    var resultDict: NSDictionary=[:]
    var comapniesArr:[Company] = [Company]()




    override func viewDidLoad() {
     super.viewDidLoad()

     self.uiTblCompanyResultView.delegate=self
     self.uiTblCompanyResultView.dataSource=self
     self.comapniesArr.append(Company(orgName: "cbre", orgCode: "orgCode2", imageName: "3.png"))

     // Do any additional setup after loading the view, typically from a nib.
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
    // Dispose of any resources that can be recreated.
    }



    func tableView(tableView:UITableView, numberOfRowsInSection section:Int) -> Int {

        return  self.comapniesArr.count
    }

     func tableView(tableView:UITableView, cellForRowAtIndexPath indexPath:NSIndexPath) -> UITableViewCell {


            let cell: CompantResultCell = tableView .dequeueReusableCellWithIdentifier("cell") as CompantResultCell


            let companyResult=comapniesArr[indexPath.row]
             println("dgfdf \(companyResult.orgName)")


            cell.setCompanyCell(uiImgConComp: companyResult.imageName,lblCompanyName: companyResult.orgName)

            return cell
    }
}

客户细胞类

import UIKit

    class CompantResultCell: UITableViewCell {

        @IBOutlet var uiImgConComp: UIImageView!

     @IBOutlet var lblCompanyName: UILabel!


        override func awakeFromNib() {
            super.awakeFromNib()
        }

        override init(style: UITableViewCellStyle, reuseIdentifier: String?) {
            super.init(style: style, reuseIdentifier: reuseIdentifier)
        }

        required init(coder aDecoder: NSCoder) {
            //fatalError("init(coder:) has not been implemented")
            super.init(coder: aDecoder)
        }

        override func setSelected(selected: Bool, animated: Bool) {
            super.setSelected(selected, animated: animated)
        }
        func setCompanyCell(imageName: String,lblCompanyName: String)
        {
            self.uiImgConComp.image=UIImage(named: imageName)
            self.lblCompanyName.text=lblCompanyName;

        }

    }

Answer 1

自定义单元类看起来很完美！

您需要在tableView:(_cellForRowAtIndexPath:)方法中解包自定义单元格对象，如下所示：

func tableView(tableView:UITableView, cellForRowAtIndexPath indexPath:NSIndexPath) -> UITableViewCell {

    var cell: CompantResultCell! = tableView .dequeueReusableCellWithIdentifier("cell") as? CompantResultCell

    if (cell == nil) {
        cell = CompantResultCell(style: UITableViewCellStyle.Default, reuseIdentifier:"cell")
    }

    let companyResult=comapniesArr[indexPath.row]
    println("dgfdf \(companyResult.orgName)")


    cell.setCompanyCell(uiImgConComp: companyResult.imageName,lblCompanyName: companyResult.orgName)

    return cell
}

编辑：

还在UIImage方法中展开setCompanyCell个对象：

func setCompanyCell(imageName: String,lblCompanyName: String) {

    var cellImage = UIImage(named: imageName as String!) as UIImage!
    self.uiImgConComp.image = cellImage
    self.lblCompanyName.text=lblCompanyName;
}

在Swift中调用函数行为是不同的，不像在Objective C中那样。将此函数调用如下：

cell.setCompanyCell(companyResult.imageName, lblCompanyName: companyResult.orgName)

Swift致命错误：在Tableview中展开Optional值（lldb）时意外发现nil

1 个答案: