我有一个关注/取消关注按钮,并且正在通过“发件人”进行访问。当用户点击以跟随或取消关注另一个用户时,我正在更改文本。问题在于,当它应显示“取消关注”时,它会显示情节提要中使用的默认文本。该按钮应更改为“关注”,而不是“取消关注”。另外,我必须使用“发送者:UIButton”,因为我正在访问表视图单元格“标记”以获取正确的信息。
@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()
}
})
}
最佳答案
您的问题是按钮操作中的这一行
@IBAction func followButton(_ sender: UIButton) {
.
.
var isFollower = false
.
.
}
您在按钮动作中声明了
isFollow
变量。这意味着,无论每次关注或取消关注,您的isFollower
都是false
,这就是为什么遵循条件会起作用的原因。但是,在跟随完成内进行的对true
的更改不会在您下次单击按钮时反映出来,因为您将isFollower
重置为false
。解决方案:将变量
isFollow
移动到按钮操作之外。var isFollow = false
@IBAction func followButton(_ sender: UIButton) {
// Your logic
}
另外,您在完成中包含的逻辑似乎是错误的。类似于下面的代码,应该可以将其更改为
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
}
关于ios - Swift发件人UIButton更改文本,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/52542336/