tableview
UITableview
properties:
var tableviewTitles = ["item 1","item 2", "item 3","item 4","item 5","item 6"]in viewdidload()
self.tableView.registerClass(UITableViewCell.self, forCellReuseIdentifier: "cell")obliged data en source methods
//MARK: tableview
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return tableviewTitles.count
}
func numberOfSectionsInTableView(tableView: UITableView) -> Int {
return 1
}
let cellIdentifier = "cell"
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier(cellIdentifier) as UITableViewCell
cell.textLabel?.text = tableviewTitles[indexPath.row]
return cell
}with a lot of (large) images:
extension ViewController{
func numberOfSectionsInTableView(tableView: UITableView) -> Int {
return 1
}
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return images.count
}
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier("Cell", forIndexPath: indexPath)
cell.textLabel?.text = images[indexPath.row]
if cache.objectForKey("\(indexPath.row)") != nil
{
cell.imageView?.image = cache.objectForKey("\(indexPath.row)") as! UIImage
}
else{
}
return cell
}
func tableView(tableView: UITableView, willDisplayCell cell: UITableViewCell, forRowAtIndexPath indexPath: NSIndexPath) {
if cache.objectForKey("\(indexPath.row)") != nil
{
cell.imageView?.image = cache.objectForKey("\(indexPath.row)") as! UIImage
}
else{
cell.imageView?.image = UIImage(named: "placeholder.png")
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0)) {
if let img = UIImage(named: "\(self.images[indexPath.row]).png")
{
cell.imageView?.image = img
self.cache.setObject(img, forKey: "\(indexPath.row)")
}
}
}
}
}