Question

我做了一个RSSParser，我不想将日期从dd/MM/yyyy转换为func setDateForCell(cell:ActuTblCell, indexPath:NSIndexPath) { let dateFormatter = NSDateFormatter() dateFormatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ssZ" let dateString = posts.objectAtIndex(indexPath.row).valueForKey("date") as! String if let dateAdded = dateFormatter.dateFromString(dateString) { dateFormatter.dateFormat = "dd/MM/yyyy" cell.dateActuCell?.text = "\(dateFormatter.stringFromDate(dateAdded))" } //cell.dateActuCell?.text = posts.objectAtIndex(indexPath.row).valueForKey("date") as? String }：

import UIKit

@objc
protocol ActualitesViewControllerDelegate {
    optional func toggleLeftPanel()
    optional func collapseSidePanels()
}

class ActualitesViewController: UIViewController, UITableViewDelegate, UITableViewDataSource, NSXMLParserDelegate {
    @IBOutlet var tableView: UITableView!

    var parser = NSXMLParser()
    var posts = NSMutableArray()
    var elements = NSMutableDictionary()
    var element = NSString()
    var title1 = NSMutableString()
    var date = NSMutableString()
    var dscrptn = NSMutableString()

    override func viewDidLoad()
    {
        super.viewDidLoad()
        self.navigationController?.navigationBar.barTintColor = UIColor(red: 38.0/255.0, green: 51.0/255.0, blue: 85.0/255.0, alpha: 1.0)
        self.navigationController?.navigationBar.titleTextAttributes = [NSFontAttributeName: UIFont(name: "Gotham", size: 13)!, NSForegroundColorAttributeName : UIColor.whiteColor()]
        self.title = "ACTUALITÉS"

        self.beginParsing()
    }

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

    func beginParsing()
    {
        posts = []
        parser = NSXMLParser(contentsOfURL:(NSURL(string:"http://www.solutis.fr/actualites-rachat-credit,rss.html"))!)!
        parser.delegate = self
        parser.parse()

        tableView!.reloadData()
    }

    //XMLParser Methods

    func parser(parser: NSXMLParser, didStartElement elementName: String, namespaceURI: String?, qualifiedName qName: String?, attributes attributeDict: [String : String])
    {
        element = elementName
        if (elementName as NSString).isEqualToString("item")
        {
            elements = NSMutableDictionary()
            elements = [:]
            title1 = NSMutableString()
            title1 = ""
            date = NSMutableString()
            date = ""
            dscrptn = NSMutableString()
            dscrptn = ""
        }
    }

    func parser(parser: NSXMLParser, didEndElement elementName: String, namespaceURI: String?, qualifiedName qName: String?)
    {
        if (elementName as NSString).isEqualToString("item") {
            if !title1.isEqual(nil) {
                elements.setObject(title1, forKey: "title")
            }
            if !date.isEqual(nil) {
                elements.setObject(date, forKey: "date")
            }
            if !dscrptn.isEqual(nil) {
                elements.setObject(dscrptn, forKey: "dscrptn")
            }

            posts.addObject(elements)
        }
    }

    func parser(parser: NSXMLParser, foundCharacters string: String)
    {
        if element.isEqualToString("title") {
            title1.appendString(string)
        } else if element.isEqualToString("pubDate") {
            date.appendString(string)
        } else if element.isEqualToString("description") {
            dscrptn.appendString(string)
        }
    }

    //Tableview Methods

    func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int
    {
        return posts.count
    }

    func tableView(tableView: UITableView, heightForRowAtIndexPath indexPath: NSIndexPath) -> CGFloat {
        return UITableViewAutomaticDimension
    }

    func tableView(tableView: UITableView, estimatedHeightForRowAtIndexPath indexPath: NSIndexPath) -> CGFloat {
        return 10
    }

    func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell
    {
        return basicCellAtIndexPath(indexPath)
    }


    func basicCellAtIndexPath(indexPath:NSIndexPath) -> ActuTblCell {
        let cell = tableView.dequeueReusableCellWithIdentifier("cell") as! ActuTblCell

        setTitleForCell(cell, indexPath: indexPath)
        setDateForCell(cell, indexPath: indexPath)
        setDescriptionForCell(cell, indexPath: indexPath)
        return cell
    }

    func setTitleForCell(cell:ActuTblCell, indexPath:NSIndexPath) {
        cell.titleActuCell?.text = posts.objectAtIndex(indexPath.row).valueForKey("title") as! NSString as String
    }

    func setDateForCell(cell:ActuTblCell, indexPath:NSIndexPath) {
        let dateFormatter = NSDateFormatter()
        dateFormatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ssZ"
        let dateString = posts.objectAtIndex(indexPath.row).valueForKey("date") as! String
        if let dateAdded = dateFormatter.dateFromString(dateString)
        {
            dateFormatter.dateFormat = "dd/MM/yyyy"
            cell.dateActuCell?.text = "\(dateFormatter.stringFromDate(dateAdded))"
        }
        //cell.dateActuCell?.text = posts.objectAtIndex(indexPath.row).valueForKey("date") as? String
    }

    func setDescriptionForCell(cell:ActuTblCell, indexPath:NSIndexPath) {
        cell.descriptionActuCell?.text = posts.objectAtIndex(indexPath.row).valueForKey("dscrptn") as! NSString as String
    }
}

但是当我设置断点时，我的功能并没有进入if条件。

print(posts.objectAtIndex(indexPath.row).valueForKey("date") as? String)

如果我这样做：

我明白了：

可选（＆＃34; 2015-10-19T10：59：53 + 00：00 \ n \吨\吨\吨＆＃34）

Answer 1

我是新来回答问题，但我想提供帮助！

我的猜测是你的dateFormatter没有解析你传入的dateString。

我会打印出日期（即从对象中获取dateString后抛入debugPrint）并检查它是否具有此行中所需的相同格式： dateFormatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ssZ"

应该是这样的＆＃34; 2015-11-02＆＃39; 01：22：18：08-08：00＆＃34;如果字符串是正确的匹配。

Answer 2

您获得的字符串包含空格和换行符在将字符串传递给日期格式化程序之前修剪字符串。

let dateString = posts.objectAtIndex(indexPath.row).objectForKey("date") as! String
if let dateAdded = dateFormatter.dateFromString(dateString.stringByTrimmingCharactersInSet(NSCharacterSet.whitespaceAndNewlineCharacterSet()) { ...

在XMLparser之后无法从String转换日期

2 个答案: