搜索栏有困难过滤SWIFT 3

那么我现在要做的是过滤器的用户名，到我从火力得到的CollectionView。我已经完成了所有设置，当我单击搜索栏时，它会提取用户名并将其显示到集合视图中。当我开始在搜索栏上输入内容时，它会过滤用户名，但不在用户界面上。

这样做的原因是因为搜索栏和collectionViews它显示点击当过滤用户名，在不同的班级。

还是不知道我想说什么？这就是我的意思是：

click here for the searchBar & CollectionViewController together picture

click here to for the searchBar & collection View

UserSearchController与相关的代码：

var users = [User]() 
func fetchUsers() { 
    let ref = FIRDatabase.database().reference().child("users") 
    ref.observe(.value, with: { (snapshot) in 
     guard let dictionaries = snapshot.value as? [String: Any] else { return } 

     //For each iterates through every object in the dictioary 
     dictionaries.forEach({ (key, value) in 

      guard let userDictionary = value as? [String: Any] else { return} 
      let user = User(uid: key, dictionary: userDictionary) 
      self.users.append(user) 
      print(user.uid, user.username) 
     }) 
     self.collectionView?.reloadData() 

    }) { (error) in 
     print("failed to fetch users:", error) 
    } 
} 

func searchBar(_ searchBar: UISearchBar, textDidChange searchText: String) { 

    self.users = self.users.filter { (user) -> Bool in 
     print(",here:",user) 
     return user.username.contains(searchText) 
    } 
    self.collectionView?.reloadData() 
}

UserSearchCV相关代码：

var users = [User]() 
func fetchUsers() { 

    let ref = FIRDatabase.database().reference().child("users") 
    ref.observe(.value, with: { (snapshot) in 
     guard let dictionaries = snapshot.value as? [String: Any] else { return } 

     //For each iterates through every object in the dictioary 
     dictionaries.forEach({ (key, value) in 

      guard let userDictionary = value as? [String: Any] else { return} 
      let user = User(uid: key, dictionary: userDictionary) 
      self.users.append(user) 
      print(user.uid, user.username) 
     }) 
     self.collectionView?.reloadData() 

    }) { (error) in 
     print("failed to fetch users:", error) 
    } 
} 


func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int { 

//let numberOfUsers = UserSearchController.searchBar(users.count) did you mean to use a value of this type instead? 
    return users.count 
} 

func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell { 
    let cell = collectionView.dequeueReusableCell(withReuseIdentifier: cellId, for: indexPath) as! UserSearchCVCell 
    //  let filteredUsers = UserSearchController.searchBar(users.count) 
    //  cell.user = filteredUsers[indexPath.item] 
    cell.user = users[indexPath.item] 
    return cell 
}

的代码已经被评论出去会很好b它不会让我编译一个错误'实例成员'searchBar不能用于'UserSearchController'类型。

VAR用户=用户样本数据：

struct User { 
let uid: String 
let username: String 
let profileImageUrl: String 
let videos: String 
init(uid: String, dictionary: [String: Any]) { 
    self.uid = uid 
    self.username = dictionary["username"] as? String ?? "" 
    self.profileImageUrl = dictionary["profileImageUrl"] as? String ?? "" 
    self.videos = dictionary["Videos"] as? String ?? "" 
}

}

让我知道，如果你有了解该问题的任何问题。谢谢！

来源

2017-08-29 Erik Batista

请解释“它会过滤用户名，但不在用户界面上”和图像哟你说“打字时不想过滤”？ – 3stud1ant3

@ 3stud1ant3当然。我试图说的是，它打印输入时发生在“textDidChange”方法中发生的过滤。但收集视图根本不会过滤。它保持不变，就像没有任何事情发生一样 –

也请解释你展示的两幅图像之间的差异，所以我可以理解你的应用程序的流程还是它们是相同的？ – 3stud1ant3

与OP讨论后，我们已经找到了解决

请按照以下

第一次更新你的搜索栏的方法如下

func searchBar(_ searchBar: UISearchBar, textDidChange searchText: String) { 


self.users = self.users.filter { (user) -> Bool in 
print(",here:",user) 
delegate?.passFilterArray(self.users) 
return user.username.contains(searchText) 

} 
searchUsersCV.isHidden = true 
searchUsersCV.updateUsersView(self.users) 

self.collectionView?.reloadData() 
}

，然后在UserSearchCV添加此

func updateUsersView(_ users: [User]) { 

self.users = users 
print(self.users) 
self.collectionView.reloadData() 
}

来源

2017-08-29 08:58:41 3stud1ant3

搜索栏有困难过滤SWIFT 3

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