Swift sender UIButton change text - ios

Question

I have a follow/unfollow button and am accessing it by "sender". I am changing the text when the user taps it to follow or unfollow another user. Problem is that when it should show "unfollow" it is showing the default text used in storyboard. The button changes to "follow" as it should, but not "unfollow". Also, I have to use "sender: UIButton" because I am accessing the tableview cells "tag" for the right information.
#IBAction func followButton(_ sender: UIButton) {
//self.yourFollowing.removeAll()
//self.following.removeAll()
self.followingTableView.reloadData()
let accessData = self.yourFollowing[sender.tag].dataPass
let businessUid = accessData["uid"] as! String
let businessName = accessData["businessName"] as! String
let businessStreet = accessData["businessStreet"] as! String
let businessCity = accessData["businessCity"] as! String
let businessState = accessData["businessState"] as! String
let businessZip = accessData["businessZIP"] as! String
let businessPhone = accessData["businessPhone"] as! String
let businessLatitude = accessData["businessLatitude"] as! String
let businessLongitude = accessData["businessLongitude"] as! String
let businessWebsite = accessData["businessWebsite"] as! String
let businessFacebook = accessData["facebookURL"] as! String
let businessFoursquare = accessData["foursquareURL"] as! String
let businessGoogle = accessData["googleURL"] as! String
let businessInstagram = accessData["instagramURL"] as! String
let businessSnapchat = accessData["snapchatURL"] as! String
let businessTwitter = accessData["twitterURL"] as! String
let businessYelp = accessData["yelpURL"] as! String
let userID = Auth.auth().currentUser!.uid
let ref = Database.database().reference()
let key = ref.child("Businesses").childByAutoId().key
var isFollower = false
let followersRef = "followers/\(businessUid)/\(self.loggedInUserData?["uid"] as! String)"
let followingRef = "following/" + (self.loggedInUserData?["uid"] as! String) + "/" + (businessUid)
ref.child("Businesses").child(userID).child("following").queryOrderedByKey().observeSingleEvent(of: .value, with: { snapshot in
if let following = snapshot.value as? [String : AnyObject] {
for (item, value) in following {
if value as! String == businessUid {
isFollower = true
let followersRef = "followers/\(businessUid)/\(self.loggedInUserData?["uid"] as! String)"
let followingRef = "following/" + (self.loggedInUserData?["uid"] as! String) + "/" + (businessUid)
let childUpdates = [followingRef:NSNull(),followersRef:NSNull()]
self.databaseRef.updateChildValues(childUpdates)
ref.child("Businesses").child(userID).child("following/\(item)").removeValue()
ref.child("Businesses").child(businessUid).child("followers/\(item)").removeValue()
sender.titleLabel?.text = "follow"
//self.yourFollowing.removeAll()
self.following.removeAll()
self.followingTableView.reloadData()
}
}
}
// Follow
if !isFollower {
sender.titleLabel?.text = "unfollow"
let followersData = ["email":self.loggedInUserData?["email"] as! String, "businessName":self.loggedInUserData?["businessName"] as! String]
let followingData = ["businessName":businessName, "businessStreet":businessStreet, "businessCity":businessCity, "businessState":businessState, "businessZIP":businessZip, "businessPhone":businessPhone, "businessWebsite":businessWebsite,"businessLatitude":businessLatitude, "businessLongitude":businessLongitude, "facebookURL":businessFacebook, "twitterURL":businessTwitter, "instagramURL":businessInstagram, "googleURL":businessGoogle, "yelpURL":businessYelp, "foursquareURL":businessFoursquare, "snapchatURL":businessSnapchat, "uid":businessUid]
let childUpdates = [followersRef:followersData, followingRef:followingData]
self.databaseRef.updateChildValues(childUpdates)
let following = ["following/\(key)" : businessUid]
let followers = ["followers/\(key)" : userID]
ref.child("Businesses").child(userID).updateChildValues(following as Any as! [AnyHashable : Any])
ref.child("Businesses").child(businessUid).updateChildValues(followers)
self.yourFollowing.removeAll()
self.following.removeAll()
self.followingTableView.reloadData()
}
})
}

Answer 1

Your problem is this line in your button action
#IBAction func followButton(_ sender: UIButton) {
.
.
var isFollower = false
.
.
}
You are declaring the variable isFollow inside the button action. This means that every time regardless of follow or unfollow, your isFollower is false which is why the condition for follow will work. But the change to true which is inside the completion of follow won't reflect next time you click the button because you are resetting isFollower to false.
Solution: Move the variable isFollow outside the button action.
var isFollow = false
#IBAction func followButton(_ sender: UIButton) {
// Your logic
}
Also your logic inside the completion seems wrong. Something like the code below should be there to change it to false.
if value as! String == businessUid {
isFollower = !isFollower
if isFollower {
// Follow logic
sender.setTitle("unfollow", for: .normal)
} else {
// Unfollowed logic
sender.setTitle("follow", for: .normal)
}
// Reload table
}