When I follow the article How To Create A Swift App Without Storyboard to learn how to create an iOS app without using the storyboard, after I remove the Main.storyboard file and run it. I meet an error message like this Could not find a storyboard named ‘Main’ in bundle NSBundle.
When using Xcode 11 to create a new iOS project, if you still create the root view controller in AppDelegate class’s – func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool function as usual, you will find there is a compile time error which said Value of type ‘AppDelegate’ has no member ‘window’. And
How To Set Application Root View Controller Programmatically In Xcode 11 Read More »
When you develop an iOS app use swift in Xcode, the project template commonly creates a default UIViewController class defined in ViewController.swift file. This UIViewController class is used as a controller of the MVC pattern to respond to the app’s main window view’s event.
How To Present / Dismiss UIView Controller Programmatically In Swift Read More »
If you are a beginner of iOS swift programming, you may be confused by some strange swift operator, such as _, !, ?, ??. This article will tell you what dose those strange swift operator means one by one.
What Does Operator _ , ! , ? , ?? Means In Swift Read More »
When you use Mac OS Finder to browse files, you will find it can not display hidden files. This is the Mac OS default settings. But this is not user-friendly when you need to select hidden files in the Mac OS Finder to submit the hidden files to a web server. So this article will
When you view pictures on Mac OS, you may find you can only view one picture at one time. If you want to view another image picture, you should close the first image viewer, and then click and open the second image in a new image preview viewer. This is not user-friendly. This article will
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When you develop an iOS app, you may want your app to support iPhone, iPad only, or support both of them. And in some cases, if your UI layout is very complex, you can make your iOS app layout fixed by showing the app only in one orientation ( for example Portrait or Landscape orientation
When you develop an iOS app, you may need to add some resource files ( such as image files, audio files, data files, etc) into it. And when you installed an iOS app binary file, you can open it in the macOS finder by right click the app binary file then click the Show Package
How To Add Resource Files Into Xcode Project And iOS App Read More »
Xcode build directory is used to save iOS app binary files when you build your Xcode app. Xcode provides you several ways to specify the build output directory location. It can be a unique subfolder or a shared subfolder in Xcode derived data directory ( in this case all the Xcode projects use one build
How To Configure Xcode Default, Workspace, Project Build Directory Location Read More »
When I use Xcode 10.3 to open an old Xcode project, I encounter the below error messages. The error message said unable to log in with the current apple account, and no profiles for the project were found. You can find the error message by clicking the project name in the Xcode project left side