SwiftUI : How I can use custom font for NavigationBarTitle Strings? - swiftui

Question

import SwiftUI
struct AddChildrenView: View {
#State var word : String = ""
#State var meaning : String = ""
#State var isShowAlert : Bool = false
#State var isClicked : Bool = false
#State var searchText : String = ""
#EnvironmentObject var itemModel : ItemModel
var item : Item
var searchItem : [Children] {
if searchText.isEmpty {
return item.children
} else {
return item.children.filter({$0.word!.contains(searchText)})
}
}
init() {
UINavigationBar.appearance().titleTextAttributes = [.font : UIFont(name: "NotoSans-Bold", size: 20)!]
}
var body: some View {
NavigationView {
ZStack {
if item.children.count == 0 {
NochildrenView()
} else {
List {
ForEach(searchItem) {child in
WordListRowView(children: child)
.swipeActions(edge: .trailing, allowsFullSwipe: true, content: {
Button(role: .destructive, action: {
itemModel.deleteChildren(children: child, item: item)
}, label: {
Image(systemName: "trash.fill")
})
Button(action: {
itemModel.favoriteChildren(item: item, children: child)
}, label: {
Image(systemName: "star.circle.fill")
.font(.title3)
})
.tint(.green)
})
}
}
.listStyle(.insetGrouped)
.padding(.top, -10)
.searchable(text: $searchText, placement: .navigationBarDrawer(displayMode: .always))
.autocapitalization(.none)
}
}
.navigationBarTitle("\(item.group!)'s Words")
.navigationBarTitleDisplayMode(.inline)
.navigationBarItems(trailing:
HStack {
Button(action: {
addChildren()
}, label: {
Image(systemName: "plus")
})
Button(action: {
itemModel.shuffleChildren(item: item)
}, label: {
Image(systemName: "shuffle")
})
NavigationLink(destination: FlashCardView(item: item)) {
Image(systemName: "play.rectangle")
}
.disabled(item.children.isEmpty)
})
}
}
}
extension AddChildrenView {
func addChildren() {
let alert = UIAlertController(title: "Saving word", message: "Type word and meaning 😀", preferredStyle: .alert)
alert.addTextField { word in
word.placeholder = "Type a word"
word.keyboardType = .alphabet
}
alert.addTextField { meaning in
meaning.placeholder = "a meaning of word"
}
let addfolderAction = UIAlertAction(title: "Add", style: .default, handler: {
(_) in
self.word = alert.textFields![0].text!
self.meaning = alert.textFields![1].text!
itemModel.addNewChildren(item: item, word: word, meaning: meaning)
})
let cancelAction = UIAlertAction(title: "Cancel", style: .destructive, handler: {
(_) in
})
alert.addAction(cancelAction)
alert.addAction(addfolderAction)
UIApplication.shared.windows.first?.rootViewController?.present(alert, animated: true, completion: nil)
}
}
Hello, first, this view is the second view after click the navigationLink in firstView.
init() {
UINavigationBar.appearance().titleTextAttributes = [.font : UIFont(name: "NotoSans-Bold", size: 20)!]
}
I tried this code to use custom font on my navigationBartitle, but there is error like this.
"Return from initializer without initializing all stored properties"
Could you let me know the way I can solve this problem?
Thank you!