Archive for February, 2016

[iPhone|iPad|iOS] Sales Tax & Discount – Zippy Calculator Free 4.1.0 was released.

Friday, February 12th, 2016

I’m happy to announce version 4.1.0 of zippy calculator release. It has new feature that is iPad’s layout position. You can select either left or right position of history view. See below.


Zippy Calculator Free – Sales Tax & Discount

Zippy Calculator – Sales Tax & Discount

[iOS] Dynamic Change AutoLayout’s NSConstraint

Saturday, February 6th, 2016

Zippy Calculator‘s Japanese user wrote review.

It’s more easier to use if calculate buttons and history area position are swapped.

Zippy Calculator’s layout is horizontal layout now.
I added new feature that can swap those position. I submitted new version to App Store. If they approve the app smoothly, it will update next week.


This post is how to implement this feature.


[iOS] NSDate Utility Extension in Swift

Monday, February 1st, 2016

I would like to make helper class for NSDate in Swift.
I created and pushed to github.

>> KinkumaDesign/SwiftNSDateUtilityExtension – Swift