蓝色标记(当前被截断)是否有可能完全显示,然后自动换行?
NavigationLink(destination: GameListView()) {
VStack(alignment: .leading, spacing: 5){
// Name der Sammlung:
Text(collection.name)
.font(.headline)
// Optional: Für welche Konsolen bzw. Plattformen:
HStack(alignment: .top, spacing: 10){
ForEach(collection.platforms, id: \.self) { platform in
Text(platform)
.padding(.all, 5)
.font(.caption)
.background(Color.blue)
.foregroundColor(Color.white)
.cornerRadius(5)
.lineLimit(1)
}
}
}
.padding(.vertical, 10)
}
此外,蓝色标记中不应包含换行符:
答案 0 :(得分:4)
我曾经创建过你需要的东西。
我在 HStack
中使用过 VStack
。
您传入用于确定最大行宽的 geometryProxy
。
我把它传递进来,这样它就可以在滚动视图中使用
我将 SwiftUI 视图包装在 UIHostingController 中以获得每个孩子的大小。
然后我遍历视图,将它们添加到行中,直到达到最大宽度,在这种情况下,我开始添加到新行。
这只是 init 和 final 阶段组合和输出 VStack 中的行
struct WrappedHStack<Content: View>: View {
private let content: [Content]
private let spacing: CGFloat = 8
private let geometry: GeometryProxy
init(geometry: GeometryProxy, content: [Content]) {
self.content = content
self.geometry = geometry
}
var body: some View {
let rowBuilder = RowBuilder(spacing: spacing,
containerWidth: geometry.size.width)
let rowViews = rowBuilder.generateRows(views: content)
let finalView = ForEach(rowViews.indices) { rowViews[$0] }
VStack(alignment: .center, spacing: 8) {
finalView
}.frame(width: geometry.size.width)
}
}
extension WrappedHStack {
init<Data, ID: Hashable>(geometry: GeometryProxy, @ViewBuilder content: () -> ForEach<Data, ID, Content>) {
let views = content()
self.geometry = geometry
self.content = views.data.map(views.content)
}
init(geometry: GeometryProxy, content: () -> [Content]) {
self.geometry = geometry
self.content = content()
}
}
神奇就在这里
extension WrappedHStack {
struct RowBuilder {
private var spacing: CGFloat
private var containerWidth: CGFloat
init(spacing: CGFloat, containerWidth: CGFloat) {
self.spacing = spacing
self.containerWidth = containerWidth
}
func generateRows<Content: View>(views: [Content]) -> [AnyView] {
var rows = [AnyView]()
var currentRowViews = [AnyView]()
var currentRowWidth: CGFloat = 0
for (view) in views {
let viewWidth = view.getSize().width
if currentRowWidth + viewWidth > containerWidth {
rows.append(createRow(for: currentRowViews))
currentRowViews = []
currentRowWidth = 0
}
currentRowViews.append(view.erasedToAnyView())
currentRowWidth += viewWidth + spacing
}
rows.append(createRow(for: currentRowViews))
return rows
}
private func createRow(for views: [AnyView]) -> AnyView {
HStack(alignment: .center, spacing: spacing) {
ForEach(views.indices) { views[$0] }
}
.erasedToAnyView()
}
}
}
这里是我使用的扩展
extension View {
func erasedToAnyView() -> AnyView {
AnyView(self)
}
func getSize() -> CGSize {
UIHostingController(rootView: self).view.intrinsicContentSize
}
}
您可以在此处查看包含一些示例的完整代码: https://gist.github.com/kanesbetas/63e719cb96e644d31bf027194bf4ccdb
答案 1 :(得分:3)
以下是一些如何使用alignmentGuide完成此操作的方法。为了避免过多的代码发布,它被简化了,但是希望它是有用的。
这是结果:
这是完整的演示代码(自动支持方向):
stateless allocator
答案 2 :(得分:1)
我遇到了同样的问题,为了解决它,我将对象项传递给一个函数,该函数首先为项创建视图,然后通过 UIHostController 我将根据项的宽度计算下一个位置。项目视图然后由函数返回。
import SwiftUI
class TestItem: Identifiable {
var id = UUID()
var str = ""
init(str: String) {
self.str = str
}
}
struct AutoWrap: View {
var tests: [TestItem] = [
TestItem(str:"Ninetendo"),
TestItem(str:"XBox"),
TestItem(str:"PlayStation"),
TestItem(str:"PlayStation 2"),
TestItem(str:"PlayStation 3"),
TestItem(str:"random"),
TestItem(str:"PlayStation 4"),
]
var body: some View {
var curItemPos: CGPoint = CGPoint(x: 0, y: 0)
var prevItemWidth: CGFloat = 0
return GeometryReader { proxy in
ZStack(alignment: .topLeading) {
ForEach(tests) { t in
generateItem(t: t, curPos: &curItemPos, containerProxy: proxy, prevItemWidth: &prevItemWidth)
}
}.padding(5)
}
}
func generateItem(t: TestItem, curPos: inout CGPoint, containerProxy: GeometryProxy, prevItemWidth: inout CGFloat, hSpacing: CGFloat = 5, vSpacing: CGFloat = 5) -> some View {
let viewItem = Text(t.str).padding([.leading, .trailing], 15).background(Color.blue).cornerRadius(25)
let itemWidth = UIHostingController(rootView: viewItem).view.intrinsicContentSize.width
let itemHeight = UIHostingController(rootView: viewItem).view.intrinsicContentSize.height
let newPosX = curPos.x + prevItemWidth + hSpacing
let newPosX2 = newPosX + itemWidth
if newPosX2 > containerProxy.size.width {
curPos.x = hSpacing
curPos.y += itemHeight + vSpacing
} else {
curPos.x = newPosX
}
prevItemWidth = itemWidth
return viewItem.offset(x: curPos.x, y: curPos.y)
}
}
struct AutoWrap_Previews: PreviewProvider {
static var previews: some View {
AutoWrap()
}
}
答案 3 :(得分:0)
您需要在“文本视图”之后立即处理行配置。如果您需要多行,请不要使用lineLimit(1)。
HStack(alignment: .top, spacing: 10){
ForEach(collection.platforms, id: \.self) { platform in
Text(platform)
.fixedSize(horizontal: false, vertical: true)
.lineLimit(10)
.multilineTextAlignment(.leading)
.padding(.all, 5)
.font(.caption)
.background(Color.blue)
.foregroundColor(Color.white)
.cornerRadius(5)
}
}
答案 4 :(得分:0)
我找到了一个名为ASCollectionView的框架解决方案。希望这对遇到同样问题的人有所帮助。
答案 5 :(得分:0)
我有类似这样的代码(相当长)。在简单的情况下,它可以正常工作,但是在与几何读取器进行深度嵌套时,它的尺寸不能很好地传播。
如果此视图像Text()那样扩展和流动以扩展父视图内容,那将是很好的选择,但它似乎已明确设置其相对于父视图的高度。
https://gist.github.com/michzio/a0b23ee43a88cbc95f65277070167e29
这是代码中最重要的部分(没有预览和测试数据)
private func flow(in geometry: GeometryProxy) -> some View {
print("Card geometry: \(geometry.size.width) \(geometry.size.height)")
return ZStack(alignment: .topLeading) {
//Color.clear
ForEach(data, id: self.dataId) { element in
self.content(element)
.geometryPreference(tag: element\[keyPath: self.dataId\])
/*
.alignmentGuide(.leading) { d in
print("Element: w: \(d.width), h: \(d.height)")
if (abs(width - d.width) > geometry.size.width)
{
width = 0
height -= d.height
}
let result = width
if element\[keyPath: self.dataId\] == self.data.last!\[keyPath: self.dataId\] {
width = 0 //last item
} else {
width -= d.width
}
return result
}
.alignmentGuide(.top) { d in
let result = height
if element\[keyPath: self.dataId\] == self.data.last!\[keyPath: self.dataId\] {
height = 0 // last item
}
return result
}*/
.alignmentGuide(.top) { d in
self.alignmentGuides\[element\[keyPath: self.dataId\]\]?.y ?? 0
}
.alignmentGuide(.leading) { d in
self.alignmentGuides\[element\[keyPath: self.dataId\]\]?.x ?? 0
}
}
}
.background(Color.pink)
.frame(maxWidth: .infinity, maxHeight: .infinity, alignment: .topLeading)
//.animation(self.loaded ? .linear(duration: 1) : nil)
.onPreferenceChange(_GeometryPreferenceKey.self, perform: { preferences in
DispatchQueue.main.async {
let (alignmentGuides, totalHeight) = self.calculateAlignmentGuides(preferences: preferences, geometry: geometry)
self.alignmentGuides = alignmentGuides
self.totalHeight = totalHeight
self.availableWidth = geometry.size.width
}
})
}
func calculateAlignmentGuides(preferences: \[_GeometryPreference\], geometry: GeometryProxy) -> (\[AnyHashable: CGPoint\], CGFloat) {
var alignmentGuides = \[AnyHashable: CGPoint\]()
var width: CGFloat = 0
var height: CGFloat = 0
var rowHeights: Set<CGFloat> = \[\]
preferences.forEach { preference in
let elementWidth = spacing + preference.rect.width
if width + elementWidth >= geometry.size.width {
width = 0
height += (rowHeights.max() ?? 0) + spacing
//rowHeights.removeAll()
}
let offset = CGPoint(x: 0 - width, y: 0 - height)
print("Alignment guides offset: \(offset)")
alignmentGuides\[preference.tag\] = offset
width += elementWidth
rowHeights.insert(preference.rect.height)
}
return (alignmentGuides, height + (rowHeights.max() ?? 0))
}
}
答案 6 :(得分:0)
对我来说,没有一个答案有效。要么是因为我有不同类型的元素,要么是因为周围的元素没有正确定位。因此,我最终实现了自己的 WrappingHStack,它的使用方式与 HStack 非常相似。您可以在 GitHub: WrappingHStack 找到它。