How To Download iOS Simulator To Fix Xcode Error Can’t Select iOS Simulator
After i upgrade my Xcode to version 10.3, i found all the iOS simulator which i used before has lost. And when i build or run the iOS app in […]
iOS Tutorial
How To Fix Xcode Error Failed To Create Provisioning Profile. There Are No Devices Registered In Your Account On The Developer Website.
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 […]
How To Fix Xcode Error Failed To Find Or Create Execution Context For Description IBCocoaTouchPlatformToolDescription
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: […]
How To Fix Warning Attempt To Present UIAlertController On ViewController Whose View Is Not In The Window Hierarchy
I want to implement an effect that when the iOS app start, it popup an alert dialog in the screen and display some messages. But during the process, i meet […]
How To Fix Xcode Not Automatically Creating Bridging Header File Issue
If you want to import objective-c class’s .h and .m file into swift project, Xcode will create an Objective-C Bridging Header file in the swift project automatically. But sometimes you […]
How To Call Objective C Code From Swift Project
When you develop iOS app use swift, if you have some older function wrote by objective-c language, you can use Objective-C bridging header file to import your objective-c header files […]
How To Create Xcode Workspace And Add New / Exist Project Into It
Xcode use workspace and project to manage swift source code. When you develop an iOS app, you should first create a workspace, and then create and add new project into […]
iOS Swift Function External And Internal Parameter Name Example
When we define a swift function, we can provide function parameters to it, and each function parameter can has an external name and an internal name. External name is used […]
How To Add iOS App Icon, Image, Color Set To Xcode Project Assets Catalog Correctly
Xcode project organize project resource files use Asset Catalog. Each asset catalog can contain multiple asset sets, for example app icon set, image set, color set etc. When you create […]
How To Change Swift Constraints To Make Autolayout Programmatically
In previous article, we have learnt how to change swift constraints use auto layout tool bar visually ( How To Add Constraints In Xcode 10 To Implement Auto Layout ). […]
