Swift UITableView Index Out of Range Error - ios

Question

I am running a Firebase app in Swift. Here I am fetching Followers and Following Users. In cases where the user has just signed up, the app crashes as there may be no follower/following users yet. I have tried everything I can think of to handle the error, and all are not helping. My question is :
1. How can I avoid this crash?
2. Is there any way I can put an image or a button instead of blank tables that will redirect them to follow other users?
Below is the code :
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "InProfileCell", for: indexPath) as! ConnectionsCell
if currentIndex == 1 {
let user = followerusers[indexPath.row]
cell.showFollowersUsers(val: user)
print("follower")
} else {
let user = followingUsers[indexPath.row]
cell.showFollowingUsers(val: user)
print("following")
}
return cell
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
if currentIndex == 0 {
return followingUsers.count
} else {
return followerusers.count
}
}
func numberOfSections(in tableView: UITableView) -> Int {
return 1
}

Answer 1

The logic in your numberOfRows and cellForRow is inconsistent. Your numberOfRows states that
if currentIndex == 0 {
followingUsers
} else {
followerUsers
}
However, your cellForRow is inconsistent with this because it states that
if currentIndex == 1 { //NOTE THAT YOU ARE USING 1 HERE INSTEAD OF 0
followerUsers
} else {
followingUsers
}
Now when the currentIndex is 2, the numberOfRows will return count of the followerUsers but the cellForRow would try to access the values of followingUsers (instead of followerUsers). That is the reason you are getting index out of range.