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Add double tap gesture and fix bugs

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Changlog-Added: Image double-tap gesture
Closes: #397
This commit is contained in:
OlegAba
2023-01-25 16:25:55 -05:00
committed by William Casarin
parent 1baae90beb
commit 5de745fb19
4 changed files with 179 additions and 66 deletions
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4
damus.xcodeproj/project.pbxproj
View File

@@ -174,6 +174,7 @@
7C45AE6D297352F90031D7BC /* SVGKit in Frameworks */ = {isa = PBXBuildFile; productRef = 7C45AE6C297352F90031D7BC /* SVGKit */; };
7C45AE6F297352F90031D7BC /* SVGKitSwift in Frameworks */ = {isa = PBXBuildFile; productRef = 7C45AE6E297352F90031D7BC /* SVGKitSwift */; };
7C45AE71297353390031D7BC /* KFImageModel.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7C45AE70297353390031D7BC /* KFImageModel.swift */; };
7C902AE32981D55B002AB16E /* ZoomableScrollView.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7C902AE22981D55B002AB16E /* ZoomableScrollView.swift */; };
9609F058296E220800069BF3 /* BannerImageView.swift in Sources */ = {isa = PBXBuildFile; fileRef = 9609F057296E220800069BF3 /* BannerImageView.swift */; };
BA693074295D649800ADDB87 /* UserSettingsStore.swift in Sources */ = {isa = PBXBuildFile; fileRef = BA693073295D649800ADDB87 /* UserSettingsStore.swift */; };
BAB68BED29543FA3007BA466 /* SelectWalletView.swift in Sources */ = {isa = PBXBuildFile; fileRef = BAB68BEC29543FA3007BA466 /* SelectWalletView.swift */; };
@@ -423,6 +424,7 @@
647D9A8C2968520300A295DE /* SideMenuView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = SideMenuView.swift; sourceTree = "<group>"; };
64FBD06E296255C400D9D3B2 /* Theme.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Theme.swift; sourceTree = "<group>"; };
7C45AE70297353390031D7BC /* KFImageModel.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = KFImageModel.swift; sourceTree = "<group>"; };
7C902AE22981D55B002AB16E /* ZoomableScrollView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ZoomableScrollView.swift; sourceTree = "<group>"; };
9609F057296E220800069BF3 /* BannerImageView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = BannerImageView.swift; sourceTree = "<group>"; };
BA693073295D649800ADDB87 /* UserSettingsStore.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = UserSettingsStore.swift; sourceTree = "<group>"; };
BAB68BEC29543FA3007BA466 /* SelectWalletView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = SelectWalletView.swift; sourceTree = "<group>"; };
@@ -724,6 +726,7 @@
4CBCA92F297DB57F00EC6B2F /* WebsiteLink.swift */,
4CC7AAEC297F0B9E00430951 /* Highlight.swift */,
4CF0ABE22981BC7D00D66079 /* UserView.swift */,
7C902AE22981D55B002AB16E /* ZoomableScrollView.swift */,
);
path = Components;
sourceTree = "<group>";
@@ -996,6 +999,7 @@
4C363AA828297703006E126D /* InsertSort.swift in Sources */,
4C285C86283892E7008A31F1 /* CreateAccountModel.swift in Sources */,
4C64987C286D03E000EAE2B3 /* DirectMessagesView.swift in Sources */,
7C902AE32981D55B002AB16E /* ZoomableScrollView.swift in Sources */,
4C363A8C28236B92006E126D /* PubkeyView.swift in Sources */,
4C5C7E68284ED36500A22DF5 /* SearchHomeModel.swift in Sources */,
4C75EFB728049D990006080F /* RelayPool.swift in Sources */,

81
damus/Components/ImageCarousel.swift
View File

@@ -115,56 +115,6 @@ private struct ImageContainerView: View {
// TODO: Update ImageCarousel with serializer and processor
// .serialize(by: imageModel.serializer)
// .setProcessor(imageModel.processor)
}
}
struct ZoomableScrollView<Content: View>: UIViewRepresentable {
private var content: Content
init(@ViewBuilder content: () -> Content) {
self.content = content()
}
func makeUIView(context: Context) -> UIScrollView {
let scrollView = UIScrollView()
scrollView.delegate = context.coordinator
scrollView.maximumZoomScale = 20
scrollView.minimumZoomScale = 1
scrollView.bouncesZoom = true
scrollView.showsVerticalScrollIndicator = false
scrollView.showsHorizontalScrollIndicator = false
let hostedView = context.coordinator.hostingController.view!
hostedView.translatesAutoresizingMaskIntoConstraints = true
hostedView.autoresizingMask = [.flexibleWidth, .flexibleHeight]
hostedView.frame = scrollView.bounds
hostedView.backgroundColor = .clear
scrollView.addSubview(hostedView)
return scrollView
}
func makeCoordinator() -> Coordinator {
return Coordinator(hostingController: UIHostingController(rootView: self.content))
}
func updateUIView(_ uiView: UIScrollView, context: Context) {
context.coordinator.hostingController.rootView = self.content
assert(context.coordinator.hostingController.view.superview == uiView)
}
class Coordinator: NSObject, UIScrollViewDelegate {
var hostingController: UIHostingController<Content>
init(hostingController: UIHostingController<Content>) {
self.hostingController = hostingController
}
func viewForZooming(in scrollView: UIScrollView) -> UIView? {
return hostingController.view
}
}
}
@@ -177,6 +127,14 @@ struct ImageView: View {
@State private var selectedIndex = 0
@State var showMenu = true
var safeAreaInsets: UIEdgeInsets? {
return UIApplication
.shared
.connectedScenes
.flatMap { ($0 as? UIWindowScene)?.windows ?? [] }
.first { $0.isKeyWindow }?.safeAreaInsets
}
var navBarView: some View {
VStack {
HStack {
@@ -222,22 +180,24 @@ struct ImageView: View {
ZoomableScrollView {
ImageContainerView(url: urls[index])
.aspectRatio(contentMode: .fit)
.padding(.top, safeAreaInsets?.top)
.padding(.bottom, safeAreaInsets?.bottom)
}
.ignoresSafeArea()
.tag(index)
.modifier(SwipeToDismissModifier(minDistance: 50, onDismiss: {
presentationMode.wrappedValue.dismiss()
}))
.ignoresSafeArea()
.tag(index)
}
}
.ignoresSafeArea()
.tabViewStyle(PageTabViewStyle(indexDisplayMode: .never))
.onChange(of: selectedIndex, perform: { _ in
showMenu = true
.gesture(TapGesture(count: 2).onEnded {
// Prevents menu from hiding on double tap
})
.onTapGesture {
.gesture(TapGesture(count: 1).onEnded {
showMenu.toggle()
}
})
.overlay(
VStack {
if showMenu {
@@ -250,14 +210,7 @@ struct ImageView: View {
}
}
.animation(.easeInOut, value: showMenu)
.padding(
.bottom,
UIApplication
.shared
.connectedScenes
.flatMap { ($0 as? UIWindowScene)?.windows ?? [] }
.first { $0.isKeyWindow }?.safeAreaInsets.bottom
)
.padding(.bottom, safeAreaInsets?.bottom)
)
}
}

152
damus/Components/ZoomableScrollView.swift Normal file
View File

@@ -0,0 +1,152 @@
//
// ZoomableScrollView.swift
// damus
//
// Created by Oleg Abalonski on 1/25/23.
//
import SwiftUI
struct ZoomableScrollView<Content: View>: UIViewRepresentable {
private var content: Content
init(@ViewBuilder content: () -> Content) {
self.content = content()
}
func makeUIView(context: Context) -> UIScrollView {
let scrollView = GesturedScrollView()
scrollView.delegate = context.coordinator
scrollView.maximumZoomScale = 20
scrollView.minimumZoomScale = 1
scrollView.bouncesZoom = true
scrollView.showsVerticalScrollIndicator = false
scrollView.showsHorizontalScrollIndicator = false
let hostedView = context.coordinator.hostingController.view!
hostedView.translatesAutoresizingMaskIntoConstraints = true
hostedView.autoresizingMask = [.flexibleWidth, .flexibleHeight]
hostedView.frame = scrollView.bounds
hostedView.backgroundColor = .clear
scrollView.addSubview(hostedView)
return scrollView
}
func makeCoordinator() -> Coordinator {
return Coordinator(hostingController: UIHostingController(rootView: self.content, ignoreSafeArea: true))
}
func updateUIView(_ uiView: UIScrollView, context: Context) {
context.coordinator.hostingController.rootView = self.content
assert(context.coordinator.hostingController.view.superview == uiView)
}
class Coordinator: NSObject, UIScrollViewDelegate {
var hostingController: UIHostingController<Content>
init(hostingController: UIHostingController<Content>) {
self.hostingController = hostingController
}
func viewForZooming(in scrollView: UIScrollView) -> UIView? {
return hostingController.view
}
func scrollViewDidZoom(_ scrollView: UIScrollView) {
let viewSize = hostingController.view.frame.size
guard let imageSize = scrollView.subviews[0].subviews.last?.frame.size else { return }
if scrollView.zoomScale > 1 {
let ratioW = viewSize.width / imageSize.width
let ratioH = viewSize.height / imageSize.height
let ratio = ratioW < ratioH ? ratioW:ratioH
let newWidth = imageSize.width * ratio
let newHeight = imageSize.height * ratio
let left = 0.5 * (newWidth * scrollView.zoomScale > viewSize.width ? (newWidth - viewSize.width) : (scrollView.frame.width - scrollView.contentSize.width))
let top = 0.5 * (newHeight * scrollView.zoomScale > viewSize.height ? (newHeight - viewSize.height) : (scrollView.frame.height - scrollView.contentSize.height))
scrollView.contentInset = UIEdgeInsets(top: top, left: left, bottom: top, right: left)
} else {
scrollView.contentInset = .zero
}
}
}
}
fileprivate class GesturedScrollView: UIScrollView, UIGestureRecognizerDelegate {
let doubleTapGesture: UITapGestureRecognizer
override init(frame: CGRect) {
doubleTapGesture = UITapGestureRecognizer()
super.init(frame: frame)
doubleTapGesture.addTarget(self, action: #selector(handleDoubleTap))
doubleTapGesture.numberOfTapsRequired = 2
addGestureRecognizer(doubleTapGesture)
doubleTapGesture.delegate = self
}
required init?(coder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
@objc func handleDoubleTap(_ gesture: UITapGestureRecognizer) {
if self.zoomScale == 1 {
let pointInView = gesture.location(in: self.subviews.first)
let newZoomScale = self.maximumZoomScale / 4.0
let scrollViewSize = self.bounds.size
let width = scrollViewSize.width / newZoomScale
let height = scrollViewSize.height / newZoomScale
let originX = pointInView.x - (width / 2.0)
let originY = pointInView.y - (height / 2.0)
let zoomRect = CGRect(x: originX, y: originY, width: width, height: height)
self.zoom(to: zoomRect, animated: true)
} else {
self.setZoomScale(self.minimumZoomScale, animated: true)
}
}
func gestureRecognizer(_ gestureRecognizer: UIGestureRecognizer, shouldRecognizeSimultaneouslyWith otherGestureRecognizer: UIGestureRecognizer) -> Bool {
return gestureRecognizer == doubleTapGesture
}
}
fileprivate extension UIHostingController {
convenience init(rootView: Content, ignoreSafeArea: Bool) {
self.init(rootView: rootView)
if ignoreSafeArea {
disableSafeArea()
}
}
func disableSafeArea() {
guard let viewClass = object_getClass(view) else { return }
let viewSubclassName = String(cString: class_getName(viewClass)).appending("_IgnoreSafeArea")
if let viewSubclass = NSClassFromString(viewSubclassName) {
object_setClass(view, viewSubclass)
}
else {
guard let viewClassNameUtf8 = (viewSubclassName as NSString).utf8String else { return }
guard let viewSubclass = objc_allocateClassPair(viewClass, viewClassNameUtf8, 0) else { return }
if let method = class_getInstanceMethod(UIView.self, #selector(getter: UIView.safeAreaInsets)) {
let safeAreaInsets: @convention(block) (AnyObject) -> UIEdgeInsets = { _ in
return .zero
}
class_addMethod(viewSubclass, #selector(getter: UIView.safeAreaInsets), imp_implementationWithBlock(safeAreaInsets), method_getTypeEncoding(method))
}
objc_registerClassPair(viewSubclass)
object_setClass(view, viewSubclass)
}
}
}

8
damus/Modifiers/SwipeToDismiss.swift
View File

@@ -11,13 +11,17 @@ struct SwipeToDismissModifier: ViewModifier {
let minDistance: CGFloat?
var onDismiss: () -> Void
@State private var offset: CGSize = .zero
@GestureState private var viewOffset: CGSize = .zero
func body(content: Content) -> some View {
content
.offset(y: offset.height)
.animation(.interactiveSpring(), value: offset)
.offset(y: viewOffset.height)
.animation(.interactiveSpring(), value: viewOffset)
.simultaneousGesture(
DragGesture(minimumDistance: minDistance ?? 10)
.updating($viewOffset, body: { value, gestureState, transaction in
gestureState = CGSize(width: value.location.x - value.startLocation.x, height: value.location.y - value.startLocation.y)
})
.onChanged { gesture in
if gesture.translation.width < 50 {
offset = gesture.translation