如何在 SwiftUI 的滚动视图中添加垂直向上滑动手势（以转到不同的视图）
How do I add a vertical swipe up gesture(to go to a different view) in a scrollview in SwiftUI
我设计了一个 SwiftUI 视图，它是一个滚动视图。现在我需要向它添加一个垂直滑动手势，将它带到不同的视图。我尝试使用 tabView 并为其添加 -90 度的旋转效果。但这也旋转了我的原始视图，这不是我想要的。我在处理将滚动视图向上滑动到新视图的 SwiftUI 中找不到任何相关帮助。
这是我的代码..
我用它实现的垂直滑动。但我的观点得到了旋转。设置其他角度会以某种方式消失视图。我是SwiftUI新手，卡了一个星期了1
GeometryReader { proxy in
TabView {
ScrollView {
VStack(alignment: .center) {
ZStack(alignment: .leading) {
Image("Asset 13").resizable().frame(width: percentWidth(percentage: 100), height: percentHeight(percentage: 50), alignment: .top)
HStack {
Spacer()
Image("Asset 1")//.padding(.bottom, 130)
Spacer()
}.padding(.bottom, 150)
HStack {
VStack(spacing:2) {
Text("followers").foregroundColor(.white).padding(.leading, 20)
HStack {
Image("Asset 3")
Text("10.5k").foregroundColor(.white)
}
}
Spacer()
VStack {
Image("Asset 10").padding(.trailing)
Text("300K Review ").foregroundColor(.white)
}
}.background(Image("Asset 2").resizable().frame(width: percentWidth(percentage: 100), height: percentHeight(percentage: 6), alignment: .leading))
.padding(.top, 410)
HStack {
Spacer()
Image("Asset 14").resizable().frame(width: percentWidth(percentage: 50), height: percentHeight(percentage: 25), alignment: .center)
Spacer()
}.padding(.top, 390)
}
VStack(spacing: 4) {
Text("Karuna Ahuja | Yoga Instructor").font(Font.custom(FontName.bold, size: 22))
Text("12 Years of Experience with Bhartiya Yog Sansthan").tracking(-1).font(Font.custom(FontName.light, size: 16)).opacity(0.4)
}
Divider()
HStack {
ZStack {
Image("Asset 6").resizable().frame(width: percentWidth(percentage: 30), height: percentHeight(percentage: 12), alignment: .center)
VStack {
Image("Asset 5").resizable().frame(width: percentWidth(percentage: 8), height: percentHeight(percentage: 4), alignment: .center)
Text("245").font(Font.custom(FontName.bold, size: 16))
Text("Video").font(Font.custom(FontName.medium, size: 16)).opacity(0.5)
}
}
ZStack {
Image("Asset 6").resizable().frame(width: percentWidth(percentage: 30), height: percentHeight(percentage: 12), alignment: .center)
VStack {
Image("Asset 7").resizable().frame(width: percentWidth(percentage: 8), height: percentHeight(percentage: 4), alignment: .center)
Text("45").font(Font.custom(FontName.bold, size: 16))
Text("Live Class").font(Font.custom(FontName.medium, size: 16)).opacity(0.5)
}
}
ZStack {
Image("Asset 6").resizable().frame(width: percentWidth(percentage: 30), height: percentHeight(percentage: 12), alignment: .center)
VStack {
Image("Asset 9").resizable().frame(width: percentWidth(percentage: 8), height: percentHeight(percentage: 4), alignment: .center)
Text("245").font(Font.custom(FontName.bold, size: 16))
Text("Sessions").font(Font.custom(FontName.medium, size: 16)).opacity(0.5)
}
}
}
Divider()
Text("Shine bright so that your light leads other. I'm a fitness junkie, high-energy yoga instructor. Let's make fitness FUN!").font(Font.custom(FontName.normal, size: 16)).tracking(-1).opacity(0.7).padding([.leading,.trailing], 6)
VideoPlayer(player: AVPlayer(url: videoUrl))
.frame(height: 320)
Spacer()
}.gesture(DragGesture(minimumDistance: 20, coordinateSpace: .global)
.onEnded { value in
let horizontalAmount = value.translation.width as CGFloat
let verticalAmount = value.translation.height as CGFloat
if abs(horizontalAmount) > abs(verticalAmount) {
print(horizontalAmount < 0 ? "left swipe" : "right swipe")
} else {
print(verticalAmount < 0 ? "up swipe" : "down swipe")
}
})
}.edgesIgnoringSafeArea(.all)
.ignoresSafeArea()
Text("this")
Text("this")
Text("this")
// ForEach(colors, id: \.self) { color in
// color // Your cell content
// }
// .rotationEffect(.degrees(-90)) // Rotate content
// .frame(
// width: proxy.size.width,
// height: proxy.size.height
// )
}
.frame(
width: proxy.size.height, // Height & width swap
height: proxy.size.width
)
.rotationEffect(.degrees(90), anchor: .topLeading) // Rotate TabView
.offset(x: proxy.size.width) // Offset back into screens bounds
.tabViewStyle(
PageTabViewStyle(indexDisplayMode: .never)
)
}
我看到的唯一纯 SwiftUI 方式是自己实现 ScrollView，这并不太复杂。这个例子有两个视图在彼此之上。如果将第一个视图向上拖动到屏幕中间以外的位置，它会滑开以显示第二个视图。
struct ContentView: View {
@State private var offset = CGFloat.zero
@State private var dragOffset = CGFloat.zero
@State private var viewHeight = CGFloat.zero
var body: some View {
GeometryReader { fullgeo in
ZStack(alignment: .top) {
SecondView()
// necessary for second view to resize individually
.frame(height: fullgeo.size.height)
ScrollingView()
.overlay( GeometryReader { geo in Color.clear.onAppear { viewHeight = geo.size.height }})
.offset(y: offset + dragOffset)
.gesture(DragGesture()
.onChanged { value in
dragOffset = value.translation.height
}
.onEnded { value in
withAnimation(.easeOut) {
dragOffset = .zero
offset += value.predictedEndTranslation.height
// if bottom dragged higher than 50% of screen > second view
if offset < -(viewHeight - fullgeo.size.height/2) {
dragOffset = -viewHeight
return
}
// else constrain to top / bottom of ScrollingView
offset = max(min(offset, 0), -(viewHeight - fullgeo.size.height))
}
}
)
}
}
}
}
struct ScrollingView: View {
var body: some View {
VStack {
Text("View Top").font(.headline)
ForEach(0..<10) { _ in
Text("Content")
.frame(width: 200, height: 100)
.background(.white)
}
}
.frame(maxWidth: .infinity, maxHeight: .infinity)
.background(.gray)
}
}
struct SecondView: View {
var body: some View {
Text("View Bottom").font(.headline)
.frame(maxWidth: .infinity, maxHeight: .infinity)
.background(.orange)
}
}
我设计了一个 SwiftUI 视图，它是一个滚动视图。现在我需要向它添加一个垂直滑动手势，将它带到不同的视图。我尝试使用 tabView 并为其添加 -90 度的旋转效果。但这也旋转了我的原始视图，这不是我想要的。我在处理将滚动视图向上滑动到新视图的 SwiftUI 中找不到任何相关帮助。 这是我的代码..
我用它实现的垂直滑动。但我的观点得到了旋转。设置其他角度会以某种方式消失视图。我是SwiftUI新手，卡了一个星期了1
GeometryReader { proxy in
TabView {
ScrollView {
VStack(alignment: .center) {
ZStack(alignment: .leading) {
Image("Asset 13").resizable().frame(width: percentWidth(percentage: 100), height: percentHeight(percentage: 50), alignment: .top)
HStack {
Spacer()
Image("Asset 1")//.padding(.bottom, 130)
Spacer()
}.padding(.bottom, 150)
HStack {
VStack(spacing:2) {
Text("followers").foregroundColor(.white).padding(.leading, 20)
HStack {
Image("Asset 3")
Text("10.5k").foregroundColor(.white)
}
}
Spacer()
VStack {
Image("Asset 10").padding(.trailing)
Text("300K Review ").foregroundColor(.white)
}
}.background(Image("Asset 2").resizable().frame(width: percentWidth(percentage: 100), height: percentHeight(percentage: 6), alignment: .leading))
.padding(.top, 410)
HStack {
Spacer()
Image("Asset 14").resizable().frame(width: percentWidth(percentage: 50), height: percentHeight(percentage: 25), alignment: .center)
Spacer()
}.padding(.top, 390)
}
VStack(spacing: 4) {
Text("Karuna Ahuja | Yoga Instructor").font(Font.custom(FontName.bold, size: 22))
Text("12 Years of Experience with Bhartiya Yog Sansthan").tracking(-1).font(Font.custom(FontName.light, size: 16)).opacity(0.4)
}
Divider()
HStack {
ZStack {
Image("Asset 6").resizable().frame(width: percentWidth(percentage: 30), height: percentHeight(percentage: 12), alignment: .center)
VStack {
Image("Asset 5").resizable().frame(width: percentWidth(percentage: 8), height: percentHeight(percentage: 4), alignment: .center)
Text("245").font(Font.custom(FontName.bold, size: 16))
Text("Video").font(Font.custom(FontName.medium, size: 16)).opacity(0.5)
}
}
ZStack {
Image("Asset 6").resizable().frame(width: percentWidth(percentage: 30), height: percentHeight(percentage: 12), alignment: .center)
VStack {
Image("Asset 7").resizable().frame(width: percentWidth(percentage: 8), height: percentHeight(percentage: 4), alignment: .center)
Text("45").font(Font.custom(FontName.bold, size: 16))
Text("Live Class").font(Font.custom(FontName.medium, size: 16)).opacity(0.5)
}
}
ZStack {
Image("Asset 6").resizable().frame(width: percentWidth(percentage: 30), height: percentHeight(percentage: 12), alignment: .center)
VStack {
Image("Asset 9").resizable().frame(width: percentWidth(percentage: 8), height: percentHeight(percentage: 4), alignment: .center)
Text("245").font(Font.custom(FontName.bold, size: 16))
Text("Sessions").font(Font.custom(FontName.medium, size: 16)).opacity(0.5)
}
}
}
Divider()
Text("Shine bright so that your light leads other. I'm a fitness junkie, high-energy yoga instructor. Let's make fitness FUN!").font(Font.custom(FontName.normal, size: 16)).tracking(-1).opacity(0.7).padding([.leading,.trailing], 6)
VideoPlayer(player: AVPlayer(url: videoUrl))
.frame(height: 320)
Spacer()
}.gesture(DragGesture(minimumDistance: 20, coordinateSpace: .global)
.onEnded { value in
let horizontalAmount = value.translation.width as CGFloat
let verticalAmount = value.translation.height as CGFloat
if abs(horizontalAmount) > abs(verticalAmount) {
print(horizontalAmount < 0 ? "left swipe" : "right swipe")
} else {
print(verticalAmount < 0 ? "up swipe" : "down swipe")
}
})
}.edgesIgnoringSafeArea(.all)
.ignoresSafeArea()
Text("this")
Text("this")
Text("this")
// ForEach(colors, id: \.self) { color in
// color // Your cell content
// }
// .rotationEffect(.degrees(-90)) // Rotate content
// .frame(
// width: proxy.size.width,
// height: proxy.size.height
// )
}
.frame(
width: proxy.size.height, // Height & width swap
height: proxy.size.width
)
.rotationEffect(.degrees(90), anchor: .topLeading) // Rotate TabView
.offset(x: proxy.size.width) // Offset back into screens bounds
.tabViewStyle(
PageTabViewStyle(indexDisplayMode: .never)
)
}
我看到的唯一纯 SwiftUI 方式是自己实现 ScrollView，这并不太复杂。这个例子有两个视图在彼此之上。如果将第一个视图向上拖动到屏幕中间以外的位置，它会滑开以显示第二个视图。
struct ContentView: View {
@State private var offset = CGFloat.zero
@State private var dragOffset = CGFloat.zero
@State private var viewHeight = CGFloat.zero
var body: some View {
GeometryReader { fullgeo in
ZStack(alignment: .top) {
SecondView()
// necessary for second view to resize individually
.frame(height: fullgeo.size.height)
ScrollingView()
.overlay( GeometryReader { geo in Color.clear.onAppear { viewHeight = geo.size.height }})
.offset(y: offset + dragOffset)
.gesture(DragGesture()
.onChanged { value in
dragOffset = value.translation.height
}
.onEnded { value in
withAnimation(.easeOut) {
dragOffset = .zero
offset += value.predictedEndTranslation.height
// if bottom dragged higher than 50% of screen > second view
if offset < -(viewHeight - fullgeo.size.height/2) {
dragOffset = -viewHeight
return
}
// else constrain to top / bottom of ScrollingView
offset = max(min(offset, 0), -(viewHeight - fullgeo.size.height))
}
}
)
}
}
}
}
struct ScrollingView: View {
var body: some View {
VStack {
Text("View Top").font(.headline)
ForEach(0..<10) { _ in
Text("Content")
.frame(width: 200, height: 100)
.background(.white)
}
}
.frame(maxWidth: .infinity, maxHeight: .infinity)
.background(.gray)
}
}
struct SecondView: View {
var body: some View {
Text("View Bottom").font(.headline)
.frame(maxWidth: .infinity, maxHeight: .infinity)
.background(.orange)
}
}