Swift iOS Development

Some tips and memos for developing an iOS app.

Customizing tabbar

What is "may only be called from the main thread"

swift string modification

swift how to current year, month, day

Creating Videos for App Previews

Energy Efficiency Guide for iOS Apps

How to change the text field placeholder color from storyboard

Swift on iOS13, UIView present

IOS Device Log

Disable Darkmode

Timezone list

Push notification test on simulator

sqlite intro

xcode packages

keypath examples

SwiftUI ploting tool

Other links

Developing Applications for iOS using SwiftUI

Xcode usage

How to turn to dark mode in ios Simulators, which must be upper ios version 13.

1.  go setting of iOS on the simulator  
2.  click developper 
3.  find the switch Dark Appearance and turn it on

Navigation step : storyboard 

UIViewController class:
show(_:sender:)
showDetailViewController(_:sender:)
present(_:animated:completion:)
dismiss(animated:completion:)

UINavigationController class:
pushViewController(_:animated:)
popViewController(animated:)
popToViewController(_:animated:)

popToRootViewController(animated:)

Free up Mac storage 

to clean simulter folder