我有一个按字母顺序排列的名称列表,现在我要在表视图中显示这些名称.我正在努力为每个字母分组这些名字.
我的代码如下所示：
let sections:Array<AnyObject> = ["a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z"]
var usernames = [String]()
func tableView(tableView: UITableView,cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell{
let cellID = "cell"
let cell: UITableViewCell = self.tv.dequeueReusableCellWithIdentifier(cellID) as UITableViewCell
cell.textLabel?.text = usernames[indexPath.row]
return cell
}
func tableView(tableView: UITableView,numberOfRowsInSection section: Int) -> Int{
return usernames.count
}
func numberOfSectionsInTableView(tableView: UITableView) -> Int{
return 26
}
func sectionIndexTitlesForTableView(tableView: UITableView) -> [AnyObject]!{
return self.sections
}
func tableView(tableView: UITableView,sectionForSectionIndexTitle title: String,atIndex index: Int) -> Int{
return index
}
func tableView(tableView: UITableView,titleForHeaderInSection section: Int) -> String?{
return self.sections[section] as? String
}
这一切都非常好,除了分组,使我的表视图最终如下所示：
所以我知道你应该能够使用过滤的函数在一个数组,但我不明白如何实现它.
任何关于如何进行的建议将不胜感激.
解决方法
您可以将带有名称的数组放入具有字母键的字典中.
例如
var names = ["a": ["and","array"],"b": ["bit","boring"]]; // dictionary with arrays setted for letter keys
那么您需要以下一个方式访问您的字典中的值
func tableView(tableView: UITableView,numberOfRowsInSection section: Int) -> Int{
return names[usernames[section]].count; // maybe here is needed to convert result of names[...] to NSArray before you can access count property
}
func tableView(tableView: UITableView,cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell{
let cellID = "cell"
let cell: UITableViewCell = self.tv.dequeueReusableCellWithIdentifier(cellID) as UITableViewCell
cell.textLabel?.text = names[usernames[indexPath.section]][indexPath.row]; // here you access elements in arrray which is stored in names dictionary for usernames[indexPath.section] key
return cell
}
