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
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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
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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
When I develop iOS app use Xcode and build my iOS app, I suddenly meet an error which said failed to create provisioning profile. there are no devices registered in your account on the developer website. Plug in and select a device to have XCode register it. This error confused me a lot of times.
When i upgrade my Xcode to version 10.3 and build my iOS project, i meet an error message like this Failed to find or create execution context for description ‘<IBCocoaTouchPlatformToolDescription: 0x7fe0cfa54080> System content for IBCocoaTouchFramework-ElevenAndLater <IBScaleFactorDeviceTypeDescription: 0x7fe0cfa63cb0> scaleFactor=2x’. These intermediate objects were non-nil:. This error confused me a lot of time. But finally i find
I want to implement an effect that when the iOS app starts, it popup an alert dialog on the screen and displays some messages. But during the process, I meet an error message like below, and the alert dialog is not displayed as I want. This article will tell you how to fix this issue.
If you want to import objective-c class’s .h and .m file into the swift project, Xcode will create an Objective-C Bridging Header file in the swift project automatically. But sometimes you will find it does not create the objective-c bridging header file, so you need to create and configure it manually. This article will tell
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Xcode uses workspace and projects to manage swift source code. When you develop an iOS app, you should first create a workspace, and then create and add a new project into it. You can also add existing projects into the Xcode workspace. This article will tell you how to do it.
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When we define a swift function, we can provide function parameters to it, and each function parameter can have an external name and an internal name. External name is used by the caller to pass value to the parameter, internal name is used by the function body to get the parameter value. Below is a
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