Xcode 9 – failed to emit precompiled header [duplicate]
I found out that I accidentally opened the ProjectName.xcodeproj file rather than the ProjectName.xcworkspace file. Open the xcworkspace file, project will start working again!
xcode9
Missing CFBundleIconName in Xcode9 iOS11 app release
I struggled with this all day and into the night trying every permutation I could think of and finally found this solution – hopefully this will save someone from going through this nightmare. My app was not previously using an xcassets catalog so I had added one to the project when trying to address this … Read more
CredStore Perform Query error
This error occurs when trying to retrieve an URLCredential from URLCredentialStorage for an unknown URLProtectionSpace. e.g. let protectionSpace = URLProtectionSpace.init(host: host, port: port, protocol: “http”, realm: nil, authenticationMethod: nil) var credential: URLCredential? = URLCredentialStorage.shared.defaultCredential(for: protectionSpace) produces CredStore – performQuery – Error copying matching creds. Error=-25300, query={ class = inet; “m_Limit” = “m_LimitAll”; ptcl = http; … Read more
Xcode 9 Swift Language Version (SWIFT_VERSION)
Answer to your question: You can download Xcode 8.x from Apple Download Portal or Download Xcode 8.3.3 (or see: Where to download older version of Xcode), if you’ve premium developer account (apple id). You can install & work with both Xcode 9 and Xcode 8.x in single (mac) system. (Make sure you’ve Command Line Tools … Read more
What is TIC Read Status 1:57 in iOS11/Xcode 9?
Apple staff gave the following answer: TIC expands to “TCP I/O connection”, which is a subsystem within CFNetwork that runs a TCP connection 1 and 57 are the CFStreamError domain and code, respectively; a domain of 1 is kCFStreamErrorDomainPOSIX and, within that domain, 57 is ENOTCONN In short, a TCP read has failed with ENOTCONN. … Read more
How to resize the iPhone/iPad Simulator?
⌘+1 for 100% ⌘+2 for 75% ⌘+3 for 50%
How do you perform wireless debugging in Xcode 9 with iOS 11, Apple TV 4K, etc?
Set up a device for network debugging from help.apple.com Debug your app running on an iOS or tvOS device over a Wi-Fi or other network connection. Steps to set up iPhone, iPad, or iPod touch Check that your device has a passcode and add one if it doesn’t. Your device must have a passcode to … Read more
How to use swift 4 Codable in Core Data?
You can use the Codable interface with CoreData objects to encode and decode data, however it’s not as automatic as when used with plain old swift objects. Here’s how you can implement JSON Decoding directly with Core Data objects: First, you make your object implement Codable. This interface must be defined on the object, and … Read more
Seeing black bars at the top and bottom of the iPhone X Simulator
When using launch images (instead of the much easier Launch screen file), you need to provide the properly sized launch image for each device size you wish to support. Once you add the additional launch image, your app should take advantage of the new screen size. The new iPhone X requires a launch image sized … Read more
Safe Area of Xcode 9
Safe Area is a layout guide (Safe Area Layout Guide). The layout guide representing the portion of your view that is unobscured by bars and other content. In iOS 11+, Apple is deprecating the top and bottom layout guides and replacing them with a single safe area layout guide. When the view is visible onscreen, … Read more