Ca un utilizator tipuri de caractere într-un textfield, aș dori pentru a afișa unele animație pe fiecare nou caracter tastat (cam așa cum Numerar App animă numere, dar aș vrea să-l pună în aplicare pentru caractere alfabetice, precum și).
Este posibil să facă acest lucru în SwiftUI? Intuiția mea este că am putea avea la podul de la UIKit pentru mai nuanțată acces la o textfieldmodelului element, dar nu sunt sigur cum să pună în aplicare efectiv asta.
Puteți crea doar un "Fals" TextField care apare peste cel real. Apoi arată personajele într-un ForEach.
Aceasta se face cu FocusState în iOS 15
@available(iOS 15.0, *)
struct AnimatedInputView: View {
@FocusState private var isFocused: Int?
@State var text: String = ""
//If all the fonts match the cursor is better aligned
@State var font: Font = .system(size: 48, weight: .bold, design: .default)
@State var color: Color = .gray
var body: some View {
HStack(alignment: .center, spacing: 0){
//To maintain size in between the 2 views
Text(text)
.font(font)
.opacity(0)
.overlay(
//This textField will be invisible
TextField("", text: $text)
.font(font)
.foregroundColor(.clear)
.focused($isFocused, equals: 1)
)
.background(
ZStack{
HStack(alignment: .center, spacing: 0, content: {
//You need an array of unique/identifiable characters
let uniqueArray = text.uniqueCharacters()
ForEach(uniqueArray, id: \.id, content: { char in
CharView(char: char.char, isLast: char == uniqueArray.last, font: font)
})
})
}.opacity(1)
.minimumScaleFactor(0.1)
)
.onAppear(perform: {
//Bring focus to the hidden TextField
DispatchQueue.main.asyncAfter(deadline: .now() + 0.5, execute: {
isFocused = 1
})
})
}
.padding()
.border(color)
.font(.title)
//Bring focus to the hidden textfield
.onTapGesture {
isFocused = 1
}
}
}
struct CharView: View{
var char: Character
var isLast: Bool
var font: Font
@State var scale: CGFloat = 0.75
var body: some View{
Text(char.description)
.font(font)
.minimumScaleFactor(0.1)
.scaleEffect(scale)
.onAppear(perform: {
//Animate only if last character
if isLast{
withAnimation(.linear(duration: 0.5)){
scale = 1
}
}else{
scale = 1
}
})
}
}
@available(iOS 15.0, *)
struct AnimatedInputView_Previews: PreviewProvider {
static var previews: some View {
AnimatedInputView()
}
}
//Convert String to Unique characers
extension String{
func uniqueCharacters() -> [UniqueCharacter]{
let array: [Character] = Array(self)
return array.uniqueCharacters()
}
func numberOnly() -> String {
self.trimmingCharacters(in: CharacterSet(charactersIn: "-0123456789.").inverted)
}
}
extension Array where Element == Character {
func uniqueCharacters() -> [UniqueCharacter]{
var array: [UniqueCharacter] = []
for char in self{
array.append(UniqueCharacter(char: char))
}
return array
}
}
//String/Characters can be repeating so yu have to make them a unique value
struct UniqueCharacter: Identifiable, Equatable{
var char: Character
var id: UUID = UUID()
}
Aici este o versiune de probă care. nevoie doar de numere, cum ar fi calculator de proba
import SwiftUI
@available(iOS 15.0, *)
struct AnimatedInputView: View {
@FocusState private var isFocused: Int?
@State var text: String = ""
//If all the fonts match the cursor is better aligned
@State var font: Font = .system(size: 48, weight: .bold, design: .default)
@State var color: Color = .gray
var body: some View {
HStack(alignment: .center, spacing: 0){
Text("$").font(font)
//To maintain size in between the 2 views
Text(text)
.font(font)
.opacity(0)
.overlay(
//This textField will be invisible
TextField("", text: $text)
.font(font)
.foregroundColor(.clear)
.focused($isFocused, equals: 1)
.onChange(of: text, perform: { value in
if Double(text) == nil{
//Leaves the negative and decimal period
text = text.numberOnly()
}
//This condition can be improved.
//Checks for 2 occurences of the decimal period
//Possible solution
while text.components(separatedBy: ".").count > 2{
color = .red
text.removeLast()
}
//This condition can be improved.
//Checks for 2 occurences of the negative
//Possible solution
while text.components(separatedBy: "-").count > 2{
color = .red
text.removeLast()
}
color = .gray
})
)
.background(
ZStack{
HStack(alignment: .center, spacing: 0, content: {
//You need an array of unique/identifiable characters
let uniqueArray = text.uniqueCharacters()
ForEach(uniqueArray, id: \.id, content: { char in
CharView(char: char.char, isLast: char == uniqueArray.last, font: font)
})
})
}.opacity(1)
.minimumScaleFactor(0.1)
)
.onAppear(perform: {
//Bring focus to the hidden TextField
DispatchQueue.main.asyncAfter(deadline: .now() + 0.5, execute: {
isFocused = 1
})
})
}
.padding()
.border(color)
.font(.title)
//Bring focus to the hidden textfield
.onTapGesture {
isFocused = 1
}
}
}