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我想使用从核心数据中检索到的用户名对数组进行排序。我这样检索它:
override func viewDidAppear(animated: Bool) {
let appDel:AppDelegate = UIApplication.sharedApplication().delegate as AppDelegate
let context:NSManagedObjectContext = appDel.managedObjectContext!
let freq = NSFetchRequest(entityName: "User")
let en = NSEntityDescription.entityForName("User", inManagedObjectContext: context)
myList = context.executeFetchRequest(freq, error: nil)!
tv.reloadData()
}
然后我像这样在我的表格 View 中设置单元格:
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let CellID:NSString = "cell"
var cell: UITableViewCell = self.tv.dequeueReusableCellWithIdentifier(CellID) as UITableViewCell
if let ip = indexPath as Optional {
var data:NSManagedObject = myList[ip.row] as NSManagedObject
cell.textLabel!.text = data.valueForKeyPath("username") as String!
}
我尝试在 viewDidAppear 函数中使用排序函数，如下所示:
var sortedList = myList.sorted { $0.localizedCaseInsensitiveCompare($1) == NSComparisonResult.OrderedAscending }
但这给了我一个错误提示:“找不到成员‘localizedCaseInsensitiveCompare’”
如有任何关于如何进行的建议，我们将不胜感激。