Archive for the ‘iOS / iPhone Development’ Category

[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

[iOS] CSS3 animation is stopped when I scroll my safari on iPad.

Monday, December 26th, 2011

I wrote CSS3 animation code like this, and apply it to certain element.

@-webkit-keyframes flapping {
   0% {
   100% {

But CSS3 animation is stopped when I scroll my safari on iPad.
Accurately saying, it stops on 0% position of keyframes, and doesn’t progress further more.

I googled. Then I got a result which may resolve this problem.

>> GPUアクセラレーターが使える環境で強制的に有効にできるCSSの指定方法

It says that mobile safari is flickered when safari changes CPU render to GPU one.
If safari initially uses GPU rendering, it doesn’t flicker.
To do this, write this css property to target element.

-webkit-transform-style: preserve-3d;

Then I fixed the problem by this way.

I think that safari may change render method when it scrolls.

[iOS] Think Tactic and Animate

Wednesday, July 13th, 2011

An iPad app that I took in charge of the program has been released.

>> Here is iTunes preview

Below movie is sample of animation. It animates with 2D or 3D.

>> Here is support page.

What is this app?

It tries to do that you think sport’s tactic with pieces on a board.

If you want to grab the image, you watch the sample movie.
The tactic which you made, can take out from iPad.
And you can exchange the tactic with friends.

Please check a website.

[iOS] iPhone App, DrawTri Released

Monday, March 28th, 2011

I released iphone app DrawTri.
It is free app.

>> here is the iTunes preview

>> this app’s information page

iPhone draws Processing on Mac via socket from Tasuku Maeda on Vimeo.