我实现了commmit editStyle，它允许我从表和Firebase数据库中删除记录。我现在正在尝试实现向右滑动的功能，该功能表示完成，然后在用户单击它之后实现代码。当我尝试“向右”滑动以获取领先动作时，什么也没显示。
class HoneyDoList: UITableViewController, FUIAuthDelegate, GADBannerViewDelegate {
@IBOutlet weak var doListTableView: UITableView!
var repairList = [RepairModel]()
var refRepairs: DatabaseReference?
var UserID = Auth.auth().currentUser?.uid
var bannerView: GADBannerView!
override func viewDidLoad() {
super.viewDidLoad()
//implement Google ADMobs
// In this case, we instantiate the banner with desired ad size.
bannerView = GADBannerView(adSize: kGADAdSizeBanner)
addBannerViewToView(bannerView)
bannerView.adUnitID = "ca-app-pub-3940256099942544/2934735716"
bannerView.rootViewController = self
bannerView.load(GADRequest())
bannerView.delegate = self
//get reference to firebase database
refRepairs = Database.database().reference().child("repairs").child(UserID!);
//observing the data changes
refRepairs!.observe(DataEventType.value, with: { (snapshot) in
//if the reference have some values
if snapshot.childrenCount > 0 {
//clearing the list
self.repairList.removeAll()
//iterating through all the values
for repairs in snapshot.children.allObjects as! [DataSnapshot] {
//getting values
let repairObject = repairs.value as? [String: AnyObject]
let brand = repairObject?["brand"]
let uid = repairObject?["uid"]
let id = repairObject?["id"]
let category = repairObject?["category"]
let modelNumber = repairObject?["modelNumber"]
//creating artist object with model and fetched values
let repair = RepairModel(uid: uid as! String?, id: id as! String?, category: category as! String?, brand: brand as! String?, modelNumber: modelNumber as! String?)
//appending it to list
print(snapshot.childrenCount)
self.repairList.append(repair)
}
//reloading the tableview
self.doListTableView.reloadData()
}
})
}
func tableview(_ tableView: UITableView, leadingSwipeActionsConfigurationForRowAt indexPath: IndexPath) -> UISwipeActionsConfiguration? {
let Complete = UIContextualAction(style: .normal, title: "Complete") { (action, view, nil) in
print("completed")
}
Complete.backgroundColor = #colorLiteral(red: 0.4666666687, green: 0.7647058964, blue: 0.2666666806, alpha: 1)
return UISwipeActionsConfiguration(actions: [Complete])
}
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
print(repairList.count)
return (repairList.count)
}
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath) as! RepairTableViewCell
let repair: RepairModel
repair = repairList[indexPath.row]
cell.labelBrand.text = repair.brand
cell.labelModelNumber.text = repair.modelNumber
return(cell)
}
override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
performSegue(withIdentifier: "showdetail", sender: self)
}
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if let destination = segue.destination as? DetailVC {
destination.repair = repairList[(doListTableView.indexPathForSelectedRow?.row)!]
}
}
override func tableView(_ tableView: UITableView, commit editingStyle: UITableViewCell.EditingStyle, forRowAt indexPath: IndexPath) {
let repairList = self.repairList[indexPath.row]
if let selectedRepairItem = repairList.id {
Database.database().reference().child("repairs").child(UserID!).child(selectedRepairItem).removeValue()
}
}
func addBannerViewToView(_ bannerView: GADBannerView) {
bannerView.translatesAutoresizingMaskIntoConstraints = false
view.addSubview(bannerView)
view.addConstraints(
[NSLayoutConstraint(item: bannerView,
attribute: .bottom,
relatedBy: .equal,
toItem: bottomLayoutGuide,
attribute: .top,
multiplier: 1,
constant: 0),
NSLayoutConstraint(item: bannerView,
attribute: .centerX,
relatedBy: .equal,
toItem: view,
attribute: .centerX,
multiplier: 1,
constant: 0)
])
}
/// Tells the delegate an ad request loaded an ad.
func adViewDidReceiveAd(_ bannerView: GADBannerView) {
bannerView.alpha = 0
UIView.animate(withDuration: 1, animations: {
bannerView.alpha = 1
})
}
/// Tells the delegate an ad request failed.
func adView(_ bannerView: GADBannerView,
didFailToReceiveAdWithError error: GADRequestError) {
print("adView:didFailToReceiveAdWithError: \(error.localizedDescription)")
}
/// Tells the delegate that a full-screen view will be presented in response
/// to the user clicking on an ad.
func adViewWillPresentScreen(_ bannerView: GADBannerView) {
print("adViewWillPresentScreen")
}
/// Tells the delegate that the full-screen view will be dismissed.
func adViewWillDismissScreen(_ bannerView: GADBannerView) {
print("adViewWillDismissScreen")
}
/// Tells the delegate that the full-screen view has been dismissed.
func adViewDidDismissScreen(_ bannerView: GADBannerView) {
print("adViewDidDismissScreen")
}
/// Tells the delegate that a user click will open another app (such as
/// the App Store), backgrounding the current app.
func adViewWillLeaveApplication(_ bannerView: GADBannerView) {
print("adViewWillLeaveApplication")
}
override var preferredStatusBarStyle: UIStatusBarStyle {
return .lightContent
}
}
我实现了“ leadingSwipeActionsConfigurationForRowAt”，但似乎什么也没发生。有人可以帮忙吗？
答案 0 :(得分：0)
尝试这样的事情：
func tableView(_ tableView: UITableView, leadingSwipeActionsConfigurationForRowAt indexPath: IndexPath) -> UISwipeActionsConfiguration? {
let complete = UIContextualAction.init(style: .normal, title: "Complete") { (action, view, completion) in
//...
completion(true) // Completion
}
complete.image = //... Add an image
complete.backgroundColor = //... Some color
let action = UISwipeActionsConfiguration.init(actions: [complete])
action.performsFirstActionWithFullSwipe = true //... Full swipe support
return action
}