我有一个表视图控制器，它从网站上抓取json数据，并将每个记录的值显示为一行。 TVC有一个搜索栏代表，允许您按名称搜索记录。一切正常，除非您单击已过滤的记录（即，您在搜索栏中输入搜索值并单击已过滤的列表），它会将您带到错误的记录。我不确定我做错了什么，但感谢任何帮助
import UIKit
class SearchTableViewController: UITableViewController, UITableViewDataSource, UITableViewDelegate, UISearchBarDelegate {
@IBOutlet weak var searchBar: UISearchBar!
var searchActive : Bool = false
var filtered:[String] = []
var filteredURLs:[String] = []
var filteredName:[String] = []
var TableData2:Array< String > = Array < String >()
var TableData2URLs:Array< String > = Array < String >()
var TableDataName:Array< String > = Array < String >()
var passedValue:String!
override func viewDidLoad() {
super.viewDidLoad()
self.title = "Search"
get_data_from_url(passedValue)
/* Setup delegates */
tableView.delegate = self
tableView.dataSource = self
searchBar.delegate = self
}
// functions added for search bar
func searchBarTextDidBeginEditing(searchBar: UISearchBar) {
searchActive = true;
}
func searchBarTextDidEndEditing(searchBar: UISearchBar) {
searchActive = false;
}
func searchBarCancelButtonClicked(searchBar: UISearchBar) {
searchActive = false;
}
func searchBarSearchButtonClicked(searchBar: UISearchBar) {
searchActive = false;
}
func searchBar(searchBar: UISearchBar, textDidChange searchText: String) {
filtered = TableData2.filter({ (text) -> Bool in
let tmp: NSString = text
let range = tmp.rangeOfString(searchText, options: NSStringCompareOptions.CaseInsensitiveSearch)
return range.location != NSNotFound
})
filteredURLs = TableData2URLs.filter({ (text) -> Bool in
let tmp: NSString = text
let range = tmp.rangeOfString(searchText, options: NSStringCompareOptions.CaseInsensitiveSearch)
return range.location != NSNotFound
})
filteredName = TableDataName.filter({ (text) -> Bool in
let tmp: NSString = text
let range = tmp.rangeOfString(searchText, options: NSStringCompareOptions.CaseInsensitiveSearch)
return range.location != NSNotFound
})
if(filtered.count == 0){
searchActive = false;
} else {
searchActive = true;
}
self.tableView.reloadData()
}
// End search bar code
override func numberOfSectionsInTableView(tableView: UITableView) -> Int {
return 1
}
override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
if(searchActive) {
return filtered.count
} else {
return TableData2.count
}
}
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier("Cell", forIndexPath: indexPath) as! UITableViewCell
if(searchActive){
cell.textLabel?.text = filtered[indexPath.row]
} else {
cell.textLabel?.text = TableData2[indexPath.row]
}
return cell
}
func get_data_from_url(url:String)
{
let httpMethod = "GET"
let timeout = 15
let url = NSURL(string: url)
let urlRequest = NSMutableURLRequest(URL: url!, cachePolicy: .ReloadIgnoringLocalAndRemoteCacheData, timeoutInterval: 15.0)
let queue = NSOperationQueue()
NSURLConnection.sendAsynchronousRequest(
urlRequest,
queue: queue,
completionHandler: {(response: NSURLResponse!,
data: NSData!,
error: NSError!) in
if data.length > 0 && error == nil{
let json = NSString(data: data, encoding: NSASCIIStringEncoding)
self.extract_json(json!)
}else if data.length == 0 && error == nil{
println("Nothing was downloaded")
} else if error != nil{
println("Error happened = \(error)")
}
}
)
}
func extract_json(data:NSString)
{
var parseError: NSError?
let jsonData:NSData = data.dataUsingEncoding(NSASCIIStringEncoding)!
let json: AnyObject? = NSJSONSerialization.JSONObjectWithData(jsonData, options: nil, error: &parseError)
if (parseError == nil)
{
if let countries_list = json as? NSArray
{
for (var i = 0; i < countries_list.count ; i++ )
{
if let country_obj = countries_list[i] as? NSDictionary
{
if let country_name = country_obj["country"] as? String
{
if let country_code = country_obj["region"] as? String
{
if let namevalue = country_obj["name"] as? String {
TableData2.append(namevalue + ": " + country_name )
TableData2URLs.append("http://www.example.com/jsondetail.php?value=" + namevalue)
TableDataName.append(namevalue)
}
}
}
}
}
}
}
do_table_refresh();
}
func do_table_refresh()
{
dispatch_async(dispatch_get_main_queue(), {
self.tableView.reloadData()
return
})
}
// Pass url details for Segue
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
if segue.identifier == "showDetail" {
let detailViewController = segue.destinationViewController as! DetailViewController
let myIndexPath = self.tableView.indexPathForSelectedRow()
let row = myIndexPath?.row
if(searchActive && row < filteredURLs.count){
detailViewController.webSite = filteredURLs[row!]
detailViewController.name = filteredName[row!]
detailViewController.title = filteredName[row!]
println("Filtered URL: " + filteredURLs[row!])
println(row)
println("Filtered Name: " + filteredName[row!])
println(row)
} else {
detailViewController.webSite = TableData2URLs[row!]
detailViewController.name = TableDataName[row!]
detailViewController.title = TableDataName[row!]
println("Table URL: " + TableData2URLs[row!])
println(row)
}
}
}
}
答案 0 :(得分：0)
您过度复杂并且没有正确使用对象，您应该创建一个封装所需数据的对象，以便该类的一个实例可以保存每个单元所需的所有数据。所以你的数据源是这些对象的数组，例如[国家]，过滤国家的另一个。这形成了模型。您可能也想存储该数据，因此您可以序列化对象。我会从那开始然后看看它是怎么回事。您将所有内容分成6个不同的数组，每个结果集3个。它使一切变得更加复杂。
如果允许的话，那些可以帮助你的东西也是更简洁的方式，例如
func extract_json(data:NSString)
{
var parseError: NSError?
let jsonData:NSData = data.dataUsingEncoding(NSASCIIStringEncoding)!
let json: AnyObject? = NSJSONSerialization.JSONObjectWithData(jsonData, options: nil, error: &parseError)
if (parseError == nil)
{
if let countries_list = json as? NSArray
{
for i in 0..<countries_list.count
{
if let country_obj = countries_list[i] as? NSDictionary,
country_name = country_obj["country"] as? String,
country_code = country_obj["region"] as? String,
namevalue = country_obj["name"] as? String
{
TableData2.append(namevalue + ": " + country_name )
TableData2URLs.append("http://www.example.com/jsondetail.php?value=" + namevalue)
TableDataName.append(namevalue)
}
}
}
}
do_table_refresh();
}
关于选择的问题。你确定网址都被正确过滤了吗？