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我是新来的swift & Xcode（教我自己通过教程和计算器）。我已经编写了一些在TableView中添加列表的代码，现在我正在尝试将这些列表的地方分类。排序UITableView到部分
具体来说，我有一个ViewController，我输入名称，邻居和朋友（所有字符串），这增加了一个地方到我的TableView的底部。
我想按照街区将这个地点列表分组，并且将相同街区中的所有地点一起显示在一个节中，并使用邻居字符串作为节标题。
我很接近，但我没有正确编制我的部分索引。 indexPath.section我相信是我缺少的是什么..
到目前为止，我在TableViewController有这样的代码：
// MARK: Properties
var places = [Place]()
override func viewDidLoad() {
super.viewDidLoad()
// Use the edit button item provided by the table view controller.
navigationItem.leftBarButtonItem = editButtonItem()
// Load any saved places, otherwise load sample data.
if let savedPlaces = loadPlaces() {
places += savedPlaces
}
else {
// Load the sample data.
loadSamplePlaces()
}
// Sort by neighborhood
places.sortInPlace { (place1, place2) -> Bool in
return place1.neighborhood < place2.neighborhood
}
}
// MARK: Getting Count, Number and Name of Neighborhoods
func getCountForNeighborhood(neighborhood:String) -> Int {
return places.filter { (place) -> Bool in
return place.neighborhood == neighborhood
}.count
}
func getNumberOfNeighborhoods() -> Int {
var neighborhoodCount = 0
var neighborhoodPrev = "Not a real neighborhood"
for place in places {
if place.neighborhood != neighborhoodPrev {
neighborhoodCount += 1
}
neighborhoodPrev = place.neighborhood
}
return neighborhoodCount
}
func getNeighborhoodForSection(section:Int) -> String {
var previousNeighborhood:String = "Not a real neighborhood"
var currentIndex = -1
for place in places {
if(place.neighborhood != previousNeighborhood) {
currentIndex += 1
}
if(currentIndex == section){
return place.neighborhood
}
previousNeighborhood = place.neighborhood
}
return "Unknown"
}
func loadSamplePlaces() {
let place1 = Place(name: "Motorino", neighborhood: "East Village", friend: "Maggles")!
let place2 = Place(name: "Bar Primi", neighborhood: "Lower East Side", friend: "Em")!
let place3 = Place(name: "El Carino", neighborhood: "Williamsburg", friend: "Ruby")!
places += [place1, place2, place3]
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
// MARK: - Table view data source
override func numberOfSectionsInTableView(tableView: UITableView) -> Int {
//alter this for To Try, Been To sections =2
return getNumberOfNeighborhoods()
}
override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
// #warning Incomplete implementation, return the number of rows
let neighborhood = getNeighborhoodForSection(section)
return getCountForNeighborhood(neighborhood)
}
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
// Table view cells are reused and should be dequeued using a cell identifier.
let cellIdentifier = "PlaceTableViewCell"
let cell = tableView.dequeueReusableCellWithIdentifier(cellIdentifier, forIndexPath: indexPath) as! PlaceTableViewCell
// Fetches the appropriate place for the data source layout.
let place = places[indexPath.row]
cell.placeLabel.text = place.name
cell.neighborhoodLabel.text = place.neighborhood
cell.friendLabel.text = place.friend
return cell
}
//Add section headers
override func tableView(tableView: UITableView, titleForHeaderInSection section: Int) -> String? {
return getNeighborhoodForSection(section)
}
我相当肯定它与我的cellForRowAtIndexPath方法的问题。我觉得我失去了一些代码来正确索引的数据段......
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