Question

我试图找出当表空时如何在表视图中显示消息。我想说的是：＆＃34;你还没有添加任何交易。点按“添加”按钮即可开始使用。＆＃34;。显然，如果用户也删除了所有单元格，我还需要它还原为此消息。

这是我目前在表视图控制器中的代码：

class ThirdViewController: UITableViewController {

override func viewWillAppear(animated: Bool) {
    self.tableView.reloadData()
}

override func viewDidLoad() {
    super.viewDidLoad()

    // Uncomment the following line to preserve selection between presentations
    // self.clearsSelectionOnViewWillAppear = false

    // Uncomment the following line to display an Edit button in the navigation bar for this view controller.
    // self.navigationItem.rightBarButtonItem = self.editButtonItem
}

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

// #pragma mark - Table view data source

override func numberOfSectionsInTableView(tableView: UITableView?) -> Int {
    // #warning Potentially incomplete method implementation.
    // Return the number of sections.
    return 1
}

override func tableView(tableView: UITableView?, numberOfRowsInSection section: Int) -> Int {
    // #warning Incomplete method implementation.
    // Return the number of rows in the section.
    return arrayObject.paymentsArray().count
}


override func tableView(tableView: UITableView!, cellForRowAtIndexPath indexPath: NSIndexPath!) -> UITableViewCell! {
    var cell:CustomTransactionTableViewCell = tableView.dequeueReusableCellWithIdentifier("Cell", forIndexPath: indexPath) as CustomTransactionTableViewCell
    cell.paymentNameLabel.text = (arrayObject.paymentsArray().objectAtIndex(indexPath.row)) as String
    cell.costLabel.text = (arrayObject.costArray().objectAtIndex(indexPath.row)) as String
    cell.dateLabel.text = (arrayObject.dateArray().objectAtIndex(indexPath.row)) as String

    if arrayObject.imageArray().objectAtIndex(indexPath.row) as NSObject == 0 {
        cell.paymentArrowImage.hidden = false
        cell.creditArrowImage.hidden = true
    } else if arrayObject.imageArray().objectAtIndex(indexPath.row) as NSObject == 1 {
        cell.creditArrowImage.hidden = false
        cell.paymentArrowImage.hidden = true
    }

    return cell
}

override func tableView(tableView: UITableView!, canEditRowAtIndexPath indexPath: NSIndexPath!) -> Bool {
    return true
}

override func tableView(tableView: UITableView!, commitEditingStyle editingStyle: UITableViewCellEditingStyle, forRowAtIndexPath indexPath: NSIndexPath!) {
    if (editingStyle == UITableViewCellEditingStyle.Delete) {

        if let tv=tableView {
            arrayDataCost.removeObjectAtIndex(indexPath!.row)
            arrayDataImage.removeObjectAtIndex(indexPath!.row)
            arrayDataPayments.removeObjectAtIndex(indexPath!.row)
            arrayDataDate.removeObjectAtIndex(indexPath!.row)
            tv.deleteRowsAtIndexPaths([indexPath], withRowAnimation: .Fade)
        }
    }
}
}

非常感谢任何帮助！

Answer 1

您可能希望将backgroundView设置为UILabel（或者当表为空时创建的某个视图

override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    if self.numberOfRow == 0{
        var emptyLabel = UILabel(frame: CGRectMake(0, 0, self.view.bounds.size.width, self.view.bounds.size.height))
        emptyLabel.text = "No Data"
        emptyLabel.textAlignment = NSTextAlignment.Center
        self.tableView.backgroundView = emptyLabel
        self.tableView.separatorStyle = UITableViewCellSeparatorStyle.None
        return 0
    } else {
        return self.numberOfRow
    }
}

这样的事对我来说很好

Answer 2

func numberOfSectionsInTableView(tableView: UITableView) -> Int {
       var numOfSection: NSInteger = 0
        if array.count > 0
{
            self.tableView.backgroundView = nil
            numOfSection = 1
         }
else
{
            var noDataLabel: UILabel = UILabel(frame: CGRectMake(0, 0, self.tableView.bounds.size.width, self.tableView.bounds.size.height))
            noDataLabel.text = "No Data Available"
            noDataLabel.textColor = UIColor(red: 22.0/255.0, green: 106.0/255.0, blue: 176.0/255.0, alpha: 1.0)
            noDataLabel.textAlignment = NSTextAlignment.Center
            self.tableView.backgroundView = noDataLabel
          }
        return numOfSection
  }

Answer 3

覆盖您的viewDidLoad()方法，如下所示：

override func viewDidLoad() {
    super.viewDidLoad()

    self.view.addSubview(self.yourLabel);

    if arrayObject.paymentsArray().count > 0 {
         self.tableView.hidden = NO;
         self.yourLabel.hidden = YES;
    } else {
         self.tableView.hidden = YES;
         self.yourLabel.hidden = NO;
    }
}

Answer 4

您可以使用此方法。没有功能限制

<强> Swift3

    if tableView.visibleCells.isEmpty{
            //tableview is not data 
           print("can not found data")
     }else{
         //do somethings

    }

Answer 5

您可以隐藏tableView并取消隐藏标签，也可以显示某种动画，以减少其中一个视图的alpha值以获得“淡入淡出”效果。

Answer 6

我需要实现同样的目标。这就是我所做的。

var label: UILabel {
    let label = UILabel(frame: tableView.bounds)
    label.text = "empty"
    return label
}

override func viewDidLoad() {
    tableView.backgroundView = UIView(frame: tableView.bounds)
    tableView.backgroundView?.addSubview(noPlacesMessageLabel)
}

表视图为空时如何显示标签

6 个答案: