It seems that zstack still has some issues when recalculating multiple layers with lots of views inside it.
I consider that overly a floating view on zstack, this view was not calculated by zstack, I copied the code of floating view from here, and the following is the code modified from your version:
import SwiftUI
struct TMainWnd: View {
@State var strings: [String] = ["A", "B", "C", "D", "E"]
@State var ints: [Int] = Array(1...300)
@State var selectedInt: Int?
@State var isShow = false
var body: some View {
ZStack {
ScrollView {
VStack {
ForEach(strings, id: \.self) { string in
VStack {
HStack {
Text(string)
Spacer()
}
LazyVGrid(columns: [GridItem(.flexible()), GridItem(.flexible()), GridItem(.flexible())]) {
ForEach(ints, id: \.self) { int in
VStack {
Text(String(int))
Spacer()
}
.frame( maxWidth: .infinity )
.frame(height: 200)
.background(
RoundedRectangle(cornerRadius: 5)
.fill(int % 2 == 0 ? .orange : .green)
)
.onTapGesture {
self.selectedInt = int
}
}
}
}
}
}
.padding()
}
}.floatingView(above: TFloatingWnd(selectedInt: $selectedInt))
}
}
struct TFloatingWnd : View
{
@Binding var selectedInt : Int?
var body: some View {
VStack {
Spacer()
if let selectedInt {
Text( String(selectedInt ) )
}
Spacer()
if let selectedInt {
Button {
self.selectedInt = nil
} label: {
Image(systemName: "x.circle")
.resizable()
.scaledToFit()
.frame(width: 30)
}
}
}.frame( maxWidth: .infinity, maxHeight: .infinity)
}
}
extension View {
func floatingView<Content: View>(above: Content) -> ModifiedContent<Self, Above<Content>> {
self.modifier(Above(aboveContent: above))
}
}
struct Above<AboveContent: View>: ViewModifier {
let aboveContent: AboveContent
func body(content: Content) -> some View {
content.overlay(
GeometryReader { proxy in
Rectangle().fill(Color.clear).overlay(
self.aboveContent,
alignment: .center
)
},
alignment: .center
)
}
}
tootzoe
Users receive reputation points by contributing quality content to the forums.
Posts include post and replies published on the forums.
Post authors can mark replies as Accepted to indicate successful solutions.
Apple Developer Forums admins can mark replies as Apple Recommended to indicate an approved solution
Post
Replies
Boosts
Views
Activity
the advertisement package of a peripheral device can included some customer data (several bytes) that iPhone / iPads can discover and parse without connecting to it.
such as the firmware of ble chip nrf52840 , one customised the manufacturer info in the advertising data :
static void advertising_init(void){ ... ble_advdata_manuf_data_t manuf_data; uint8_t awesomeData [8] = {0}; // your customize data here manuf_data.company_identifier = 0xaeac; // customize here manuf_data.data.p_data = awesomeData; manuf_data.data.size = sizeof(awesomeData); init.advdata.p_manuf_specific_data = &manuf_data;
now when you power on your peripheral device , you can scan the advertisement data and found your customized bytes
Hi,
you should try this
[https://github.com/swisspol/GCDWebServer)
when you run GCDWebServer on your MacBook , you can access web page from your phone app ,
i'v just tested using swift ( URLRequest + URLSession )
var req = URLRequest(url: URL(string: "http://your_macos_ip_address:8080/")!)
if let error = error {
print("Failed: \(error)")
return
}
guard let data = data else {
print("data is nil")
return
}
print(" \(data.count) bytes and is: \n")
let responseText = String(data: data, encoding: .utf8) ?? "*unknow encoding*"
print("The response is: \(responseText)")
}
task.resume()