UISearchController保留问题 [英] UISearchController retain issue

问题描述

我正在尝试使用UISearchController，但是遇到了无法解决的保留问题. MainTableview有两个部分.

I am trying to use UISearchController however I confronted with retain issue that I can't solve. MainTableview has two sections.

第1节

基于某些正则表达式的过滤数据

Filtered Data based on some Regex

第2节

所有数据

我将UISearchController添加到我的表视图中，并将ResultsTableController附加为resultsTableController.当用户搜索某些内容时，它起作用，ResultsTableController出现，并且因为我将tableview委托设置为self，所以从ResultsTableController中选择项目会在MainTableViewController中调用didSelectRowAtIndexPath.但是，如果用户从resultsTableController中选择某些内容，则会遇到分配问题.

I added UISearchController to my tableview and attached ResultsTableController as resultsTableController. It works when user search something, ResultsTableController comes forward and because I set tableview delegate to self, selecting item from ResultsTableController calls didSelectRowAtIndexPath in my MainTableViewController. However I have allocation issue if user selects something from resultsTableController.

以下情况会发生在不同的情况下

Following happens for different scenarios

• 用户不搜索任何内容，只是从中选择一个项目 MainTableview，我看到了deinit消息
• 用户搜索某些内容，取消搜索，然后从中选择项目 MainTableview，我看到了deinit消息
• 用户搜索某些内容，然后从中选择一项 ResultsTableController，我在视图控制器中没有得到deinit

• User doesn't search anything, just selects an item from MainTableview, I see deinit messages
• User searches something, cancel the search, select item from MainTableview, I see deinit messages
• User searches something, and selects an item from ResultsTableController, I don't get deinit in my viewcontrollers

MainTableViewController.swift

var searchController: UISearchController!

// Secondary search results table view.
var resultsTableController: ResultsTableController!
var allCompanies = ["Data1","Data2","Data3"]

override func viewDidLoad() {
    super.viewDidLoad()
     resultsTableController = ResultsTableController()
    // We want to be the delegate for our filtered table so didSelectRowAtIndexPath(_:) is called for both tables.
    resultsTableController.tableView.delegate = self
    searchController = UISearchController(searchResultsController: resultsTableController)
    searchController.searchResultsUpdater = self
    searchController.searchBar.sizeToFit()
    tableView.tableHeaderView = searchController.searchBar

    searchController.delegate = self
    searchController.dimsBackgroundDuringPresentation = false 
    searchController.searchBar.delegate = self   
    definesPresentationContext = true
    }
}



// MARK: UISearchBarDelegate

func searchBarSearchButtonClicked(searchBar: UISearchBar) {
    searchBar.resignFirstResponder()
}

// MARK: UISearchResultsUpdating
func updateSearchResultsForSearchController(searchController: UISearchController) {
    // Update the filtered array based on the search text.

    let filteredResults = allCompanies.filter({ company in
        (company.lowercaseString as NSString).containsString(searchController.searchBar.text.lowercaseString)
    })

    // Hand over the filtered results to our search results table.
    let resultsController = searchController.searchResultsController as! ResultsTableController
    resultsController.searchResult = filteredResults
    resultsController.tableView.reloadData()
}

// usual tableview methods

    override func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {

        if resultsTableController.searchResult.count > 0 {
        selectedCompany = resultsTableController.searchResult[index]
        //do something with selected company
        navigationController?.popViewControllerAnimated(true)
        return
     }
     //
     selectedCompany = allCompanies[index]
      navigationController?.popViewControllerAnimated(true)

}

deinit {
    println("MainTableView deinit")
}

ResultTableController.swift

class ResultsTableController:UITableViewController {

     var searchResult = [String]()

    override func viewDidLoad() {
        super.viewDidLoad()
        tableView.registerClass(UITableViewCell.self, forCellReuseIdentifier: "cell")
     }

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

        return searchResult.count
    }

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

        let cell = tableView.dequeueReusableCellWithIdentifier("cell", forIndexPath: indexPath) as! UITableViewCell
        let index = indexPath.row
        cell.textLabel?.font = UIFont(name: "Avenir-Roman", size: 16)
        cell.textLabel?.text = searchResult[index].description
        return cell

    }

    deinit {
        println("ResultTableController deinit")
    }
}

推荐答案

嘿，我今天遇到了这个问题 显然，我需要强制关闭searchController来解决保留问题

Hey there I ran into the issue today apparently I need to force the dismiss of the searchController to work around the retain issue

  override func viewWillDisappear(animated: Bool) {
    super.viewWillDisappear(animated)
    searchController?.dismissViewControllerAnimated(false, completion: nil)
  }

这是我的示例项目 https://www.dropbox.com/s/zzs0m4n9maxd2u5/TestSearch.zip ?dl = 0

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