How to build a Table View with specific number of rows? - ios

Question

I have been reading similar questions and until now neither has solved this error or I have not found it.
I have a TableView and I need the table to have a specific number of rows.
Now it works with a count of notifications from a array. In this array, I keep the notifications that come from the server.
But I want that if this array count is greater than 40, the rows are 40 and they not are the count of the array.
This is my code:
class ClassName: UITableViewController, UITabBarControllerDelegate {
public var notifications: [APINotification] = []
override func viewDidLoad() {
super.viewDidLoad()
self.tabBarController?.delegate = self
tableView.rowHeight = UITableViewAutomaticDimension
tableView.estimatedRowHeight = 140
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
override func viewDidAppear(_ animated: Bool) {
self.notifications = []
self.getLastNotifications()
APIAuth.shared.count_badge = 0
self.tabBarController?.tabBar.items![0].badgeValue = nil
}
public func getLastNotifications() {
let req = Notification()
req.getLastNotifications(onComplete: {events in
self.notifications = events
DispatchQueue.main.async(execute: {
self.tableView.reloadData()
})
})
}
override func numberOfSections(in tableView: UITableView) -> Int {
return self.notifications.count
}
// There is just one row in every section
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return 1
}
// Set the spacing between sections
override func tableView(_ tableView: UITableView, heightForHeaderInSection section: Int) -> CGFloat {
return 10
}
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let event = self.notifications[indexPath.section]
let cell = tableView.dequeueReusableCell(withIdentifier: "controller", for: indexPath) as! Controller
cell.bodyLbl.text = event.description
cell.typelbl.text = event.type
cell.typelbl.sizeToFit()
cell.titleLbl.text = event.title
cell.subjectLbl.text = event.subject?.name
return cell
} }
Thanks for your help!

Answer 1

You can change this method to :
override func numberOfSections(in tableView: UITableView) -> Int {
return self.notifications.count > 40 ? 40 : self.notifications.count
}
This will show as many rows as you got from your notification but if it's greater than 40 it will display only 40. To make it display 40 all the time just put return 40 instead but this may crash your app it the array will contain less items than 40.
Ps you display 40 sections no rows to change it to rows instead you need to chance your code to:
override func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return self.notifications.count > 40 ? 40 : self.notifications.count
}
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let event = self.notifications[indexPath.row]
...
}

Answer 2

There are several ways to achieve this:
Simple and consice:
return min(self.notifications.count, 40)
A Swifty approach:
guard self.notifications.count < 40 else {
return 40
}
return self.notifications.count
An alternative more verbose version:
return self.notifications.count < 40 ? self.notifications.count
A different more simple version:
if self.notifications.count > 40 {
return 40
} else {
return self.notifications.count
}
Use which ever version you feel best suits the purpose.
I would probably go for 1 or 2 if I felt like being all Swifty (is that even a word).

Answer 3

Try the following code:
// There is just one row in every section
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
if self.notifications.count > 40{
return 40
}
return self.notifications.count
}

Answer 4

To limit the maximum number of sections, just check the array size:
override func numberOfSections(in tableView: UITableView) -> Int {
var count = self.notifications.count
if (count > 40) {
count = 40
}
return count
}