I want to have a navigation view with 3 views where the third view need to pop to the root view when button is clicked.Here is the code I'm implementing:
import SwiftUI
class NavigationHelper: ObservableObject {
@Published var selection:String? = nil
}
struct View1: View {
@ObservedObject var navigationHelper:NavigationHelper = NavigationHelper()
var body: some View {
NavigationView{
VStack {
Text("View1")
.padding()
Button {
navigationHelper.selection = "View2"
} label: {
Text("Go To View2")
}
NavigationLink(tag: "View2", selection: $navigationHelper.selection) {
View2()
} label: {
EmptyView()
}.isDetailLink(false)
}
}.environmentObject(navigationHelper)
}
}
struct View2: View {
@EnvironmentObject var navigationHelper:NavigationHelper
var body: some View {
VStack {
Text("View2")
.padding()
Button {
navigationHelper.selection = "View3"
} label: {
Text("Go To View3")
}
NavigationLink(tag: "View3", selection: $navigationHelper.selection) {
View3()
} label: {
EmptyView()
}
}
}
}
struct View3: View {
@EnvironmentObject var navigationHelper:NavigationHelper
var body: some View {
VStack {
Text("View3")
.padding()
Button {
navigationHelper.selection = nil
} label: {
Text("Go To Root")
}
}
}
}
When View3 is opened it pops back to View1 when opened and cannot understand why? For some reason the selection property becomes nil maybe.
Rado Gotinoto Dev4e
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Hello,
I've create a sample Swift package which uses binaryTarget to add local XCFramework dependency to a package. XCFramework itself contain two static libraries: One for iOS simulator, and one for iOS device. The result is that Xcode 13 crashes, and when build from command line there is an error, that doesn't help much.
Here is sample project download site:
https://drive.google.com/file/d/1SBw77DwUOlF40EEXEJQr3i9M-afAm4lv/view?usp=sharing
Here is the result when building from command line:
swift build -Xswiftc "-sdk" -Xswiftc "`xcrun --sdk iphonesimulator --show-sdk-path`" -Xswiftc "-target" -Xswiftc "x86_64-apple-ios15.0-simulator" -v
/usr/bin/xcrun --sdk macosx --show-sdk-platform-path
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swiftc -print-target-info
/usr/bin/xcrun --sdk macosx --find xctest
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swiftc -print-target-info
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swift-frontend -frontend -print-target-info -sdk /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX11.3.sdk
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swift-frontend -frontend -print-target-info
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swift-frontend -frontend -emit-supported-features /var/folders/65/b8ghmm157gn3c_m8cnmxbx2r0000gn/T/TemporaryDirectory.WtlPlf/dummyInput-1.swift
Illegal instruction: 4
Here is stack trace from Xcode:
Process: Xcode [3774]
Path: /Applications/Xcode.app/Contents/MacOS/Xcode
Identifier: com.apple.dt.Xcode
Version: 13.0 (19234)
Build Info: IDEFrameworks-19234000000000000~16 (13A233)
App Item ID: 497799835
App External ID: 844005016
Code Type: X86-64 (Native)
Parent Process: ??? [1]
Responsible: Xcode [3774]
User ID: 501
Date/Time: 2021-10-14 17:43:33.627 +0300
OS Version: macOS 11.6 (20G165)
Report Version: 12
Bridge OS Version: 5.5 (18P4759a)
Anonymous UUID: 5B874F5B-A18E-16E7-3084-2A0B79B218C4
Time Awake Since Boot: 7600 seconds
System Integrity Protection: enabled
Crashed Thread: 5 Dispatch queue: -[IDEExecutionEnvironment initWithWorkspaceArena:] (QOS: UNSPECIFIED)
Exception Type: EXC_BAD_INSTRUCTION (SIGILL)
Exception Codes: 0x0000000000000001, 0x0000000000000000
Exception Note: EXC_CORPSE_NOTIFY
Termination Signal: Illegal instruction: 4
Termination Reason: Namespace SIGNAL, Code 0x4
Terminating Process: exc handler [3774]
...
Installed beta 5 of Xcode 13.
Getting a lot of random crashes in different places of application (e.g):
Thread 8: EXC_BREAKPOINT (code=1, subcode=0x1c80eb414)
Here is instruction list:
libsystem_platform.dylib`_os_semaphore_dispose.cold.1:
0x1c80eb3f0 <+0>: sxtw x8, w0
0x1c80eb3f4 <+4>: stp x20, x21, [sp, #-0x10]!
0x1c80eb3f8 <+8>: adrp x20, 0
0x1c0eb3fc <+12>: add x20, x20, #0xd52 ; =0xd52
0x1c80eb400 <+16>: adrp x21, 75707
0x1c80eb404 <+20>: add x21, x21, #0x568 ; =0x568
0x1c80eb408 <+24>: str x20, [x21, #0x8]
0x1c80eb40c <+28>: str x8, [x21, #0x38]
0x1c80eb410 <+32>: ldp x20, x21, [sp], #0x10
-> 0x1c80eb414 <+36>: brk #0x1
How can I find more info about this crash?
Env is : Mac mini M1 and Simulator.
I have number of static libraries, all of them build as a fat library (arm64, x86_64 are architectures).
I'm implementing dynamic framework that works with these libraries. They are added into the frameworks with
As a requirement from a client comes to have also XCFramework. XCFramework is created successfully but only if EXCLUDED_ARCHS flag is set to YES in Simulator build script. If NO this is the error I'm getting:
... building for iOS Simulator, but linking in object file built for iOS, for architecture arm64.
So is this a good approach or could be done better? I've learned today about --library flag on -create-xcframework but don't know whether they fit in my case.
Also I was thinking to create XCFramework with static libraries and include it in my library. How about this option?
Any advice will be helpful 👍
P.S My framework supports iOS 11, does this mean that I need to have version for armv7 in the static library?