我在UIViewController中有一个表视图，以表格格式显示日历信息。它显示的信息包含一行专用于日期，然后是当天所有事件，等等。我添加了一个int的mapper数组，所以我知道每个日期所在的行索引，所以我可以为该单元格添加特殊格式。在第一次加载时，它将正确加载并正确加载，但是当我开始上下移动视图时，格式不会停留，不正确的单元格会获得特殊格式，这只发生在我视图之外的单元格中。我不确定为什么会这样，但我相当肯定它与过度清新有关。
import UIKit
class CalendarController: UIViewController, UITableViewDataSource, UITableViewDelegate, NSXMLParserDelegate {
var parser: NSXMLParser = NSXMLParser()
var info: [newsarticle] = []
var postTitle: String = String()
var postDesc: String = String()
var eName: String = String()
var index: Int = Int()
var organizedinfo: [String] = [String]()
var headDates: String = String()
var mapper: [Int] = [Int]()
var datemapper: [Int] = [Int]()
var colorcatch = 0
/*
// Only override drawRect: if you perform custom drawing.
// An empty implementation adversely affects performance during animation.
override func drawRect(rect: CGRect) {
// Drawing code
}
*/
@IBOutlet var multiview: UITableView!
var refreshControl: UIRefreshControl!
override func viewDidLoad() {
let url:NSURL = NSURL(string: "http://brrsd.k12.nj.us/rss/Calendar.xml")!
parser = NSXMLParser(contentsOfURL: url)!
parser.delegate = self
parser.parse()
orgData()
refreshControl = UIRefreshControl()
refreshControl.addTarget(self, action: #selector(WebpageController.refresh(_:)), forControlEvents: UIControlEvents.ValueChanged)
multiview.addSubview(refreshControl)
}
func returnDate(numb: String) -> String
{
let fullString = numb
let dates = fullString.characters.split{$0 == "-"}.map(String.init)
if(dates.count == 3)
{
return dates[2]
}
else{
return dates[1]
}
}
func orgData(){
var i = 0
while i < info.count{
if(returnDate(info[i].title) == headDates)
{
mapper.append(organizedinfo.count)
organizedinfo.append("*" + cleanTitle(info[i]))
}
else{
datemapper.append(organizedinfo.count)
organizedinfo.append("[" + returnDate(info[i].title).substringFromIndex(info[i].title.startIndex) + "]")
mapper.append(organizedinfo.count)
organizedinfo.append("*" + cleanTitle(info[i]))
headDates = returnDate(info[i].title)
}
i += 1
}
}
func cleanTitle(a: newsarticle) -> String{
let fullString = a.title
let dates = fullString.characters.split{$0 == "-"}.map(String.init)
if(dates.count == 2){
return dates[0]
}
else{
return dates[0] + dates[1]
}
}
func refresh(sender: AnyObject)
{
colorcatch = 0
let url:NSURL = NSURL(string: "http://brrsd.k12.nj.us/rss/Calendar.xml")!
parser = NSXMLParser(contentsOfURL: url)!
parser.delegate = self
parser.parse()
multiview.reloadData()
refreshControl.endRefreshing()
}
func parser(parser: NSXMLParser, didStartElement elementName: String, namespaceURI namespaceURI: String?, qualifiedName qualifiedName: String?, attributes attributeDict: [String : String])
{
eName = elementName
if elementName == "item" {
postTitle = String()
postDesc = String()
}
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
func numberOfSectionsInTableView(tableView: UITableView) -> Int {
// #warning Incomplete implementation, return the number of sections
return 1
}
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
// #warning Incomplete implementation, return the number of rows
return organizedinfo.count
}
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell: UITableViewCell
if let reusedCell = tableView.dequeueReusableCellWithIdentifier("Cell") {
cell = reusedCell
} else {
cell = UITableViewCell(style: .Default, reuseIdentifier: "Cell")
}
if let label = cell.textLabel {
label.text = organizedinfo[indexPath.row]
}
if(colorcatch < datemapper.count){
for element in datemapper{
if element == indexPath.row
{
cell.backgroundColor = UIColor.lightGrayColor()
cell.textLabel?.textColor = UIColor.blueColor()
}
}
colorcatch += 1
}
return cell }
func parser(parser: NSXMLParser, foundCharacters string: String) {
let data = string.stringByTrimmingCharactersInSet(NSCharacterSet.whitespaceAndNewlineCharacterSet())
if (!data.isEmpty) {
if eName == "title" {
postTitle += data
} else if eName == "description" {
postDesc += data
}
}
}
func parser(parser: NSXMLParser, didEndElement elementName: String, namespaceURI: String?, qualifiedName qName: String?) {
if elementName == "item" {
let newsart: newsarticle = newsarticle()
newsart.title = postTitle
newsart.description = postDesc
info.append(newsart)
}
}
func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
index = indexPath.row
var a = true
for element in datemapper{
if element == index
{
a = false
}
}
if a{
performSegueWithIdentifier("CalendarTransfer", sender:self)
}
}
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
let Destination: FullCalendar = segue.destinationViewController as! FullCalendar
var i = 0
while mapper[i] != index{
i += 1
}
Destination.info = info[i]
}
/*
// MARK: - Navigation
// In a storyboard-based application, you will often want to do a little preparation before navigation
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
// Get the new view controller using segue.destinationViewController.
// Pass the selected object to the new view controller.
}
*/
}