UIView Life Cycle In iOS Example
After you create a Xcode project use swift single view app template, it will create a AppDelegate.swift file and a ViewController.swift file. The AppDelegate.swift file contains this iOS app’s life […]
How To Present / Dismiss UIView Controller Programmatically In Swift
When you develop iOS app use swift in Xcode, the project template commonly create a default UIViewController class defined in ViewController.swift file. This UIViewController class is used as a controller […]
How To Create Custom Class In Xcode Project
How To Create A Swift App Without Storyboard
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 […]
What Does Operator _ , ! , ? , ?? Means In Swift
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 […]
How To Get Xcode Quick Help Document For iOS API Class Or Method
When we develop iOS application use Xcode, we always need to get help document of some iOS api library class or method which you do not remember. This article will […]
How To Show Hidden Files In Mac OS Finder And Select Hidden Files In Html Upload File Form
When you use Mac OS Finder to browse files, you will find it can not display hidden files. This is Mac OS default settings. But this is not user friendly […]
How To View Multiple Pictures On Mac Continuously
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 […]
How To Simulate Memory Warning In Xcode 10 iOS Simulator
When you develop iOS app, you sometimes need to simulate memory warning notification to test your iOS app in high memory pressure condition. Xcode simulator just provide such a tool […]
How To Set iOS App Supported Devices And Orientation In Xcode Target Or Programmatically
When you develop iOS app, you may want your app support iPhone, iPad only or support both of them. And in some cases, if your UI layout is very complex, […]
