Question

在cellForRowAtIndexPath中调用NSDictionary中的值，但是我的数据（parsedData）为nil。请问如何从NSDictionary键值获取数据？

var dic1 = NSDictionary()

func parser(parser: NSXMLParser!, didStartElement elementName: String!, namespaceURI: String!, qualifiedName qName: String!, attributes attributeDict: [NSObject : AnyObject]!)
{
    element = elementName

    if (elementName as NSString).isEqualToString("info")
    {
        symbolStr = attributeDict["symbol"]! as NSMutableString
        offerlStr = attributeDict["offer"]! as NSMutableString

        dic1 = ["symbolName":symbolStr , "offerAmount":offerlStr]

        pariteArray.addObject(dic1)   
    }
}

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

    return pariteArray.count
}

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

    var parsedData: AnyObject? = dic1["symbolName"]?.indexPath
    var parsedData2: AnyObject? = dic1["offerAmount"]?.indexPath

    let cell: UITableViewCell = UITableViewCell(style: UITableViewCellStyle.Subtitle, reuseIdentifier: "MyTestCell")

    cell.textLabel?.text = parsedData as? String //nil
    cell.detailTextLabel.text = parsedData2 as? String //nil

    return cell
}

Answer 1

我不确定你要做什么，但我可以告诉你为什么你的代码错了。

在此，您将dic11的值指定为NSMutableString个对象：

symbolStr = attributeDict["symbol"]! as NSMutableString
offerlStr = attributeDict["offer"]! as NSMutableString

dic1 = ["symbolName":symbolStr , "offerAmount":offerlStr]

稍后，您尝试访问这些对象的.indexPath：

var parsedData: AnyObject? = dic1["symbolName"]?.indexPath
var parsedData2: AnyObject? = dic1["offerAmount"]?.indexPath

NSMutableString没有.indexPath。

我会在这里猜测并假设你真的想这样做：

var parsedData: AnyObject? = pariteArray[indexPath.row]["symbolName"]
var parsedData2: AnyObject? = pariteArray[indexPath.row]["offerAmount"]

从NSDictionary问题中调用特定数据键值

1 个答案: