Hi, I too have had problems with the master/detail view of Swift and SwiftUI. But the below video has helped me a great deal. https://youtu.be/nA6Jo6YnL9g Hope this helps.

Hi, If you're using storyboards, it means you don't have that IBOutlet connected to an object (such as a label, text, etc) in the storyboard. Hope this helps, Dan Uff

All I did was, make the new app and used the same Bundle Identifier inside the new app. I then made a pop-up (that would only come up once) explaining the new (designed) app. Less confusion for the end user. Which, in my experience, they don't take too likely when they have to download another app and re-pay for some of the same functionality. Dan Uff

The way I understand it, they are only to be used in code. Also, if you use an Apple-specific symbol (such as the iCloud symbol) it can only be used as a representation of an iCloud function. Dan Uff

Would you have any idea why this is happening to ME?

There is a hack that allows someone to show a message on the login screen, and maybe he/she just put it there to scare the pants off of you. Do an internet search for how to add a message to the login screen and get rid of it. Besides, if the NSA was monitoring you, why would they TELL you? Dan Uff

This happens to me sometimes. What I do is: Quit Xcode. Reload Xcode and the project. If it happens again, do 1 and 2 above, reboot the computer, and try again. Hope this helps, Dan Uff

Yes, I do all the time and there are some awesome ones. Here's a good start: https://github.com/public-apis/public-apis Dan

This happens to me quite often. Here's what I do: Shut down Xcode. Unplug iOS device from computer. Reboot. Plug iOS device back in. Start Xcode. Clean project. Try again. If it still doesn't work, do the above again, BUT also reboot the iOS device.

Hi, The image above looks too much like an iPhone. You'll have to change the image.

I am having the same problem ever since updating Xcode yesterday. Here's my diagnostics screen: ---------------------------------------- CompileDylibError: Failed to build ContentView.swift Compiling failed: file '/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator15.2.sdk/usr/lib/swift/shims/Visibility.h' has been modified since the module file '/var/folders/jt/s96c8fv518s_1y_6925ml4sc0000gn/C/clang/ModuleCache/108X1IN8WGNX1/SwiftShims-2TTN5UXQBRCCQ.pcm' was built: mtime changed <unknown>:0: error: file '/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator15.2.sdk/usr/lib/swift/shims/Visibility.h' has been modified since the module file '/var/folders/jt/s96c8fv518s_1y_6925ml4sc0000gn/C/clang/ModuleCache/108X1IN8WGNX1/SwiftShims-2TTN5UXQBRCCQ.pcm' was built: mtime changed <unknown>:0: note: please rebuild precompiled header '/var/folders/jt/s96c8fv518s_1y_6925ml4sc0000gn/C/clang/ModuleCache/108X1IN8WGNX1/SwiftShims-2TTN5UXQBRCCQ.pcm' <module-includes>:1:9: note: in file included from <module-includes>:1: #import "LibcOverlayShims.h"         ^ /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator15.2.sdk/usr/lib/swift/shims/LibcOverlayShims.h:21:2: error: file '/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator15.2.sdk/usr/lib/swift/shims/Visibility.h' has been modified since the module file '/var/folders/jt/s96c8fv518s_1y_6925ml4sc0000gn/C/clang/ModuleCache/108X1IN8WGNX1/SwiftShims-2TTN5UXQBRCCQ.pcm' was built: mtime changed #include "Visibility.h"  ^ /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator15.2.sdk/usr/lib/swift/shims/LibcOverlayShims.h:21:2: note: please rebuild precompiled header '/var/folders/jt/s96c8fv518s_1y_6925ml4sc0000gn/C/clang/ModuleCache/108X1IN8WGNX1/SwiftShims-2TTN5UXQBRCCQ.pcm' #include "Visibility.h"  ^ <unknown>:0: error: missing required module 'SwiftOverlayShims' ================================== |  BuildInvocationError |   |  /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swiftc -F /Applications/Xcode.app/Contents/SharedFrameworks-iphonesimulator -enforce-exclusivity=checked -DDEBUG -sdk /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator15.2.sdk -target arm64-apple-ios14.0-simulator -Xfrontend -serialize-debugging-options -enable-testing -swift-version 5 -I /Users/danuff/Library/Developer/Xcode/DerivedData/CAI-fpvdurwckhlgpoczgdolkzdvwcyr/Build/Intermediates.noindex/Previews/CAI/Products/Debug-iphonesimulator -F /Users/danuff/Library/Developer/Xcode/DerivedData/CAI-fpvdurwckhlgpoczgdolkzdvwcyr/Build/Intermediates.noindex/Previews/CAI/Products/Debug-iphonesimulator -c -j8 -serialize-diagnostics -Xcc -I/Users/danuff/Library/Developer/Xcode/DerivedData/CAI-fpvdurwckhlgpoczgdolkzdvwcyr/Build/Intermediates.noindex/Previews/CAI/Intermediates.noindex/CAI.build/Debug-iphonesimulator/CAI.build/swift-overrides.hmap -Xcc -iquote -Xcc /Users/danuff/Library/Developer/Xcode/DerivedData/CAI-fpvdurwckhlgpoczgdolkzdvwcyr/Build/Intermediates.noindex/Previews/CAI/Intermediates.noindex/CAI.build/Debug-iphonesimulator/CAI.build/CAI-generated-files.hmap -Xcc -I/Users/danuff/Library/Developer/Xcode/DerivedData/CAI-fpvdurwckhlgpoczgdolkzdvwcyr/Build/Intermediates.noindex/Previews/CAI/Intermediates.noindex/CAI.build/Debug-iphonesimulator/CAI.build/CAI-own-target-headers.hmap -Xcc -I/Users/danuff/Library/Developer/Xcode/DerivedData/CAI-fpvdurwckhlgpoczgdolkzdvwcyr/Build/Intermediates.noindex/Previews/CAI/Intermediates.noindex/CAI.build/Debug-iphonesimulator/CAI.build/CAI-all-target-headers.hmap -Xcc -iquote -Xcc /Users/danuff/Library/Developer/Xcode/DerivedData/CAI-fpvdurwckhlgpoczgdolkzdvwcyr/Build/Intermediates.noindex/Previews/CAI/Intermediates.noindex/CAI.build/Debug-iphonesimulator/CAI.build/CAI-project-headers.hmap -Xcc -I/Users/danuff/Library/Developer/Xcode/DerivedData/CAI-fpvdurwckhlgpoczgdolkzdvwcyr/Build/Intermediates.noindex/Previews/CAI/Products/Debug-iphonesimulator/include -Xcc -I/Users/danuff/Library/Developer/Xcode/DerivedData/CAI-fpvdurwckhlgpoczgdolkzdvwcyr/Build/Intermediates.noindex/Previews/CAI/Intermediates.noindex/CAI.build/Debug-iphonesimulator/CAI.build/DerivedSources-normal/arm64 -Xcc -I/Users/danuff/Library/Developer/Xcode/DerivedData/CAI-fpvdurwckhlgpoczgdolkzdvwcyr/Build/Intermediates.noindex/Previews/CAI/Intermediates.noindex/CAI.build/Debug-iphonesimulator/CAI.build/DerivedSources/arm64 -Xcc -I/Users/danuff/Library/Developer/Xcode/DerivedData/CAI-fpvdurwckhlgpoczgdolkzdvwcyr/Build/Intermediates.noindex/Previews/CAI/Intermediates.noindex/CAI.build/Debug-iphonesimulator/CAI.build/DerivedSources -Xcc -DDEBUG=1 -working-directory "/Users/danuff/Documents/CPS/iOS/iOS 15/Projects (Current)/iPhone : iPad/SwiftUI/General/CAI" /Users/danuff/Library/Developer/Xcode/DerivedData/CAI-fpvdurwckhlgpoczgdolkzdvwcyr/Build/Intermediates.noindex/Previews/CAI/Intermediates.noindex/CAI.build/Debug-iphonesimulator/CAI.build/Objects-normal/arm64/ContentView.1.preview-thunk.swift -o /Users/danuff/Library/Developer/Xcode/DerivedData/CAI-fpvdurwckhlgpoczgdolkzdvwcyr/Build/Intermediates.noindex/Previews/CAI/Intermediates.noindex/CAI.build/Debug-iphonesimulator/CAI.build/Objects-normal/arm64/ContentView.1.preview-thunk.o -module-name CAI_PreviewReplacement_ContentView_1 -Onone -Xfrontend -disable-modules-validate-system-headers -gline-tables-only

Yes, this is a common situation for me too. I reported it during the beta and the GM. I submitted error reports, and I still have problems. The problem happens when entering code. It just stops and hangs until I terminate Xcode via the Terminal and restart it at least 5 times a week (maybe more). It happens with Swift 5 and SwiftUI. Its annoying and inexcusable. Here's my setup: 2020 M1 Mac mini. 16GB RAM. MacOS 12.0.1 Xcode Version 13.1 (13A1030d). So YOU'RE NOT THE ONLY ONE and hope they get this resolved sooner rather than later.

Thank you, and it’s nice to know I’m not the only one who’s seeking an answer.

I did. He said that he didn’t know either.

This problem is NOT fixed. Using Xcode version 13.0 (13A233). Now it doesn't see my new iPhone 13 Pro Max all the time. When it does, the above problem exists. I even let it on for an hour and still have the same problem. Need to test a few apps on a device but can't!