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 […]
iOS Tutorial
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 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, […]
How To Make iOS App Run At Background Or Exit When Press Home Button
When you press iOS device’s home button, you may want your iOS app go to background and resume running later, or you may want your iOS app terminate and exit […]
How To Add Resource Files Into Xcode Project And iOS App
When you develop iOS app, you may need to add some resource files ( such as image file, audio file, data file etc) into it. And when you create iOS […]
