我一直在尝试为macOS构建一个工具栏-tabview组件,该组件可以与子视图组成,就像下面的TabView一样:
struct ContentView: View {
var body: some View {
TabView {
Text("First View")
.tabItem {
Image(name: "NSUserAccounts")
Text("First")
}.tag(0)
Text("Second View")
.tabItem {
Image(name: "NSUserAccounts")
Text("Second")
}.tag(1)
}
}
}
目前,我有这样的事情:
struct ToolbarTabView<Content>: NSViewControllerRepresentable where Content: View {
let content: () -> Content
init(@ViewBuilder content: @escaping () -> Content) {
self.content = content
}
func makeNSViewController(context: NSViewControllerRepresentableContext<ToolbarTabView>) -> NSTabViewController {
let vc = NSTabViewController()
vc.tabStyle = .toolbar
for item in self.content() as! something? {
let t = NSTabViewItem(viewController: NSHostingController(rootView: item))
t.image = item.image
t.label = item.label
t.identifier = item.identifier
vc.addTabViewItem(t)
}
return vc
}
func updateNSViewController(_ nsViewController: NSTabViewController, context: NSViewControllerRepresentableContext<ToolbarTabView>) {
}
typealias NSViewControllerType = NSTabViewController
}
SwiftUI可能会发生这种情况吗? TabView内容如何转换并用于获取图像和标签信息?
最佳答案
您可以让它采用一个还包含其他值的数组,而不仅仅是将内容传递到ToolbarTabView。尝试这样的事情:
struct ToolbarTabView<Content>: NSViewControllerRepresentable where Content: View {
let tabs: [(imageName: String, label: String, identifier: Int, content: () -> Content)]
init(tabs: [(imageName: String, label: String, identifier: Int, content: () -> Content)]) {
self.tabs = tabs
}
func makeNSViewController(context: NSViewControllerRepresentableContext<ToolbarTabView>) -> NSTabViewController {
let vc = NSTabViewController()
vc.tabStyle = .toolbar
for item in tabs {
let t = NSTabViewItem(viewController: NSHostingController(rootView: item.content()))
//t.image = item.image
t.label = item.label
t.identifier = item.identifier // this causes an "unrecognized selector" error, but maybe I'm passing a bad value for this, I'm not sure what it expects
vc.addTabViewItem(t)
}
return vc
}
func updateNSViewController(_ nsViewController: NSTabViewController, context: NSViewControllerRepresentableContext<ToolbarTabView>) {
}
typealias NSViewControllerType = NSTabViewController
}
struct ToolbarTabView_Previews: PreviewProvider {
static var previews: some View {
ToolbarTabView(tabs: [
(
imageName: "My Image",
label: "tab1",
identifier: 0,
content: {
Text("testing")
}
)
])
}
}
关于ios - 在SwiftUI中构建自定义的类似于TabView的 View ,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/58513264/