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 […]
iOS Swift Function External And Internal Parameter Name Example Read More »
XAMPP is a software package that is a bundle of apache, MySQL, and FTP packages. You always need to use it when you develop a PHP + MySQL application. It is easy to use on Windows, but when I use it on Mac OS, I meet some errors, this article will tell you how to
How To Connect To MySQL Server After Install XAMPP On Mac OS Read More »
Xcode project organizes project resource files use Asset Catalog. Each asset catalog can contain multiple asset sets such as app icon set, image set, color set, etc. When you create an Xcode project use one project template such as Single View App, it will create a default asset catalog file Assets.xcassets in the project files
How To Add iOS App Icon, Image, Color Set To Xcode Project Assets Catalog Correctly Read More »
In the previous article, we have learned how to change swift constraints use the auto-layout toolbar visually ( How To Add Constraints In Xcode 10 To Implement Auto Layout ). In this article, I will show you an example of how to use class UIKit.NSLayoutConstraint, UIKit.NSLayoutAnchor and Visual Format Language to add constraints to the
How To Change Swift Constraints To Make Autolayout Programmatically Read More »
When i add swift constraints to button programmatically in source code, i meet an error message like this. [LayoutConstraints] Unable to simultaneously satisfy constraints. Probably at least one of the constraints in the following list is one you don’t want.
How To Fix Swift Error LayoutConstraints Unable To Simultaneously Satisfy Constraints Read More »
In the previous article How To Add Constraints In Xcode 10 To Implement Auto Layout, we have learned what is swift constraints, how to use swift constraints to pin a UI component on the screen and make it auto layout, how to use constraints to align multiple UI components. And we also show a demo
How To Make Swift Buttons Auto Layout To Full Fill Screen Width Responsively In iOS Read More »
When you develop an iOS app use swift, you can make the UI components fixed size. But iOS devices have different screen sizes, so the fixed size UI components will render differently on different iOS devices. Even when you change the same iOS device’s orientation from portrait to landscape, the fixed size UI design will
How To Add Constraints In Xcode 10 To Implement Auto Layout Read More »
UIKit.UIAlertController class is used to implement prompt alert dialog in iOS swift application. This example will show you how to display alert dialog when click a swift button.
How To Prompt Alert Dialog When Click A Button In Swift Read More »
When you develop the iOS app in swift, you can create and set UI component’s attributes both in swift source code and use Xcode attributes inspector. We have learned how to do it programmatically in the article How To Create Multiple Button And Add Button Action Function Programmatically In iOS Swift, this article will tell
We have learnt how to use one IBAction function to process multiple button click event in article How To Use One IBAction For Multiple Buttons In Swift. In that example, we set a tag attribute value for each swift button, and then use that tag attribute value to distinguish which button is clicked in one
How To Use One Function To Process Multiple Button Click Event Programmatically In Swift Read More »
