Impressia/Vernissage/Modifiers/AnimatePlaceholderModifier....

46 lines
1.3 KiB
Swift

//
// https://mczachurski.dev
// Copyright © 2023 Marcin Czachurski and the repository contributors.
// Licensed under the MIT License.
//
import SwiftUI
struct AnimatePlaceholderModifier: AnimatableModifier {
@Binding var isLoading: Bool
@State private var isAnim: Bool = false
private var center = (UIScreen.main.bounds.width / 2) + 110
// private let animation: Animation = .linear(duration: 1.5)
private let animation: Animation = .easeOut(duration: 1)
init(isLoading: Binding<Bool>) {
self._isLoading = isLoading
}
func body(content: Content) -> some View {
content.overlay(animView.mask(content))
}
var animView: some View {
LinearGradient(
gradient: .init(colors: [.black, .black.opacity(0.6), .black.opacity(0.3), .clear]),
startPoint: .leading,
endPoint: isAnim ? .trailing : .leading)
.animation(isLoading ? animation.repeatForever(autoreverses: false) : nil, value: isAnim)
.onAppear {
guard isLoading else { return }
isAnim.toggle()
}
.onChange(of: isLoading) { _ in
isAnim.toggle()
}
}
}
extension View {
func animatePlaceholder(isLoading: Binding<Bool>) -> some View {
self.modifier(AnimatePlaceholderModifier(isLoading: isLoading))
}
}