Question

我在很多问题之后设法将我的搜索栏实现到我的表视图中。实际的搜索本身就是我能说的，但是结果没有正确显示，因为我还没有设法添加＆＃39; cellForRowAtIndexPath＆＃39;搜索代码。

这是我关注的教程：http://www.appcoda.com/search-bar-tutorial-ios7/

我在尝试将一些代码行转换为Swift时遇到了问题。例如，我不知道Swift中的这一行是什么，也不知道它用于什么：

Recipe *recipe = nil;

这是我目前的代码：

    func filterContentForSearchText(searchText: NSString) {
    let resultPredicate = NSPredicate(format: "SELF contains[cd] %@", searchText)
    searchResults = arrayDataPayments.filteredArrayUsingPredicate(resultPredicate)
}

func searchDisplayController(controller: UISearchDisplayController!, shouldReloadTableForSearchString searchString: String!) -> Bool {
    self.filterContentForSearchText(searchString)
    return true
}


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

    println(arrayObject.paymentsArray().count)

    if tableView == self.searchDisplayController.searchResultsTableView {
        return searchResults.count
    } else {
    if arrayObject.paymentsArray().count == 0 {
        if enterButtonTapped == false {
            backgroundLabel.text = "Before you add any transactions, you must first set a budget. You can do this by tapping the 'Budget' tab."
        } else {
            backgroundLabel.text = "You haven't added any transactions yet. Tap the add button to add a new transaction."
        }
        backgroundLabel.frame = CGRectMake(0, 0, self.view.bounds.width, self.view.bounds.height)
        backgroundLabel.numberOfLines = 0
        backgroundLabel.textAlignment = NSTextAlignment.Center
        backgroundLabel.sizeToFit()
        backgroundLabel.hidden = false
        backgroundLabel.textColor = UIColor.lightGrayColor()

        self.tableView.backgroundView = backgroundLabel
        self.tableView.separatorStyle = UITableViewCellSeparatorStyle.None
        self.tableView.scrollEnabled = false
        return 0
    } else {
        backgroundLabel.hidden = true
        self.tableView.separatorStyle = UITableViewCellSeparatorStyle.SingleLine
        self.tableView.scrollEnabled = true
        return arrayObject.paymentsArray().count
    }
    }
}

override func tableView(tableView: UITableView!, cellForRowAtIndexPath indexPath: NSIndexPath!) -> UITableViewCell! {
    var cell:CustomTransactionTableViewCell = self.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 {
            var valueToRemove: AnyObject! = arrayDataValue.objectAtIndex(indexPath!.row)
            println(valueToRemove)

            if arrayObject.imageArray().objectAtIndex(indexPath.row) as NSObject == 0 {
                totalSpendingsCounter = totalSpendingsCounter - Double(valueToRemove as NSNumber)
            } else if arrayObject.imageArray().objectAtIndex(indexPath.row) as NSObject == 1 {
                totalCreditCounter = totalCreditCounter - Double(valueToRemove as NSNumber)
            }

            arrayDataCost.removeObjectAtIndex(indexPath!.row)
            arrayDataImage.removeObjectAtIndex(indexPath!.row)
            arrayDataPayments.removeObjectAtIndex(indexPath!.row)
            arrayDataDate.removeObjectAtIndex(indexPath!.row)
            arrayDataValue.removeObjectAtIndex(indexPath!.row)
            tv.deleteRowsAtIndexPaths([indexPath], withRowAnimation: .Fade)
            newTransactionEntered = true
        }
    }
}

如果有人能指出我正确的方向，那么我将非常感激。这是我的第一个应用程序的最后阶段之一，它是我发现最难的部分。

Answer 1

您使用相同的tableView来显示搜索结果，这不是解决此问题的最佳方法。

创建一个新的UITableViewController子类，然后你可以这样做：

    searchResultsViewController = self.storyboard.instantiateViewControllerWithIdentifier("SearchResults") as? MySearchResultViewController

    searchController = UISearchController(searchResultsController: searchResultsViewController)
    searchController!.dimsBackgroundDuringPresentation = true
    searchController!.searchResultsUpdater = searchResultsViewController

您的MySearchResultViewController应符合UISearchResultsUpdating协议并实施updateSearchResultsForSearchController:。当您开始搜索时，UIKit会自动显示您的searchResultsViewController，并负责将其视图添加到层次结构中，并在必要时将其删除。

此外，在一个函数中设置tableView属性并不是一个好习惯，它的工作只是返回numberOfRowsInSection。

表格视图搜索结果无法正确显示

1 个答案: