Let us see an example TaskManager app using CoreData written in Swift Programming language. This app provides the following functionality Allow users to enter new task Update existing task delete task You can download source code for this project from Github. If you are familiar with user interface then move on to the Core Data […]
Storyboard, Scene and Segue
Storyboard in iOS is helps you to design the user interface of your App. A storyboard can contain one or more Scenes (View Controllers) and the connection or relationship between two scenes are known as Segue. This is how a typical storyboard with Scenes and Segue look. The above example storyboard contains two scenes, first […]
Get your current address in Swift (Swift 5)
In this Swift tutorial, we will see the steps required for using CoreLocation framework and retrieve the latitude and longitude of the location. Then use the CLGeocoder to reverse geocode the latitude and longitude details. This is a very basic tutorial that retrieves the location details on tap of a button and displays the information […]
NSUnknownKeyException – this class is not key value coding-compliant for the key
NSUnknownKeyException – this class is not key value coding-compliant for the key common error that most of the Swift beginners would face during the learning period. Terminating app due to uncaught exception ‘NSUnknownKeyException’, reason: ‘[<Handbook.StudentEntryController 0x78f948a0> setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key nametxt.’*** First throw call stack:( 0 CoreFoundation 0x02316a14 […]
Swift – WebView demo
Updated for Swift 5In this short tutorial, we will see an example in Swift programming language using UIWebView. The WebView will load a webpage and provide option to refresh, stop, go back and go forward. This tutorial should give a brief overview on how to declare IBAction, IBOutlets and use Objective-C classes (NSURL and NSURLRequest) […]
Value for SWIFT_VERSION cannot be empty.
This error occurs when the Swift version is not specified under Swift Compiler Languge for your project. All you need to do is, Navigate to Build Settings -> Swift Compiler Language, from the drop down specify the Swift version.
Unable to simultaneously satisfy constraints.
A common error that we would see when using Auto Layout is Unable to simultaneously satisfy constraints. Probably at least one of the constraints in the following list is one you don’t want. Debugging the verbose shown in the console might look difficult but if you closely go through the messages you should be able […]
Upload missing dSYMs to see crashes
If you are using Firebase Crasyltics in your app and if bitcode is enabled then you might see this message “Upload missing dSYMs to see crashes” when trying to view reported crash in Firebase Crashlytics. In order the see the stack trace, you can try uploading the dSYMs files. Compress .dSYMs files. Launch Xcode Organizer. […]