The storyboard is a very easy-to-use feature in iOS app development. It is visual and user-friendly. But in some cases, we need to know the backend of the storyboard, we should know how the code executing logic at the storyboard backend. This article will show you an example of how to create a swift app […]
How To Create A Swift App Without Storyboard 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 we develop iOS applications use Xcode, we always need to get the help document of some iOS API library class or method which we do not remember. This article will tell you how to get the Xcode quick help document of the iOS library class or method.
How To Get Xcode Quick Help Document For iOS API Class Or Method Read More »
When you develop an iOS app, you sometimes need to simulate memory warning notifications to test your iOS app in high memory pressure conditions. Xcode simulator just provides such a tool for you to trigger memory warning notifications. Then you can test your source code in ViewController class’s didReceiveMemoryWarning function. This article will tell you
How To Simulate Memory Warning In Xcode 10 iOS Simulator Read More »
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
How To Set iOS App Supported Devices And Orientation In Xcode Target Or Programmatically Read More »
When you press the iOS device’s home button, you may want your iOS app to go to the background and resume running later, or you may want your iOS app to terminate and exit at once. This article will tell you how to implement it with examples. But first, you had better read the article
How To Make iOS App Run At Background Or Exit When Press Home Button Read More »
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
After I upgrade my Xcode to version 10.3, I found all the iOS simulators which I used before have lost. And when I build or run the iOS app in Xcode, it will use a Generic iOS Device only, but I do not have a real iOS device connected to my Mac computer at all,
How To Download iOS Simulator To Fix Xcode Error Can’t Select iOS Simulator Read More »
