B4i Library CADisplayLink - A Timer that ticks on each display refresh

narek adonts · Mar 30, 2016

Hi,

Please find attached a wrapper for iOS native CADisplayLink.

CADisplayLink is much better Timer for animations as it ticks on each display refresh rate.
(http://www.bigspaceship.com/ios-animation-intervals/)

I have added a function to add an Interval for each tick but if you don't need it just set Interval=0 and it will tick on each screen refresh rate.

see attached an example.

regards

Narek

tufanv · Mar 30, 2016

narek adonts said:
Hi,

Please find attached a wrapper for iOS native CADisplayLink.

CADisplayLink is much better Timer for animations as it ticks on each display refresh rate.
(http://www.bigspaceship.com/ios-animation-intervals/)

I have added a function to add an Interval for each tick but if you don't need it just set Interval=0 and it will tick on each screen refresh rate.

see attached an example.

regards

Narek

does making tmr.enabled=false also crashes at your example ? if i set to enable true there is no problem but if i set to false the app keeps on crashing on startup.

narek adonts · Mar 30, 2016

It is set to false by default.

Set enabled=True to start it. After you can set enabled=false

b4auser1 · Mar 30, 2016

Hi, Narek

I saw some interesting wrappers for B4i from you. Could you take a look to create wrapper for XlsxReaderWriter ? This is an Objective-C library for iPhone / iPad and Mac. It parses and writes MS Excel XLSX files.
https://github.com/renebigot/XlsxReaderWriter

narek adonts · Mar 30, 2016

b4auser1 said:
Hi, Narek

I saw some interesting wrappers for B4i from you. Could you take a look to create wrapper for XlsxReaderWriter ? This is an Objective-C library for iPhone / iPad and Mac. It parses and writes MS Excel XLSX files.
https://github.com/renebigot/XlsxReaderWriter

I dont have a Mac thus I can not wrap 3rd party libraries. Sorry

tufanv · Mar 30, 2016

narek adonts said:
Hi,

Please find attached a wrapper for iOS native CADisplayLink.

CADisplayLink is much better Timer for animations as it ticks on each display refresh rate.
(http://www.bigspaceship.com/ios-animation-intervals/)

I have added a function to add an Interval for each tick but if you don't need it just set Interval=0 and it will tick on each screen refresh rate.

see attached an example.

regards

Narek

the slide is very smooth now ! Thanks for your great module.

tufanv · Apr 25, 2016

narek adonts said:
Hi,

Please find attached a wrapper for iOS native CADisplayLink.

CADisplayLink is much better Timer for animations as it ticks on each display refresh rate.
(http://www.bigspaceship.com/ios-animation-intervals/)

I have added a function to add an Interval for each tick but if you don't need it just set Interval=0 and it will tick on each screen refresh rate.

see attached an example.

regards

Narek

Dear Narek,

I am successfuly using this in 2 of my apps. In a new app, I use the same codes but i am keep getting a log says : Subs not found: b4i_cadisplaylink
and i cant slide anything. Am i forgetting stg . You have an idea ?

edit: In realease mode , it works fine so i suppose it is a problem with a debug mode

Baris Karadeniz · May 12, 2016

narek adonts said:
Hi,

Please find attached a wrapper for iOS native CADisplayLink.

CADisplayLink is much better Timer for animations as it ticks on each display refresh rate.
(http://www.bigspaceship.com/ios-animation-intervals/)

I have added a function to add an Interval for each tick but if you don't need it just set Interval=0 and it will tick on each screen refresh rate.

see attached an example.

regards

Narek

I used your codes in my app but ı get an error; Unknown type: cadisplaylink Are you missing a library reference?

What can be the problem?

narek adonts · May 12, 2016

Did you added the class?

Baris Karadeniz · May 12, 2016

No I didn't add. What should I do?

narek adonts · May 12, 2016

there is a class attached in the first post

Baris Karadeniz · May 12, 2016

Here?
CADisplayLink\Objects\shell\bin\classes\com\adonts\ca\b4i_cadisplaylink.class

narek adonts · May 12, 2016

did you downloaded the Exemple project in the 1st post?

Baris Karadeniz · May 12, 2016

Yes. I downloaded and run. Class is this?

CADisplayLink\Objects\shell\bin\classes\com\adonts\ca\b4i_cadisplaylink.class

tman · Aug 11, 2017

I ran your example code ( Interval time set at 1000) and expected to get a 1 second timer. However the result was slightly shorter than 1 sec. I used it to increment a number counter (on a label) I was expecting it to count at once per second rate but it runs a little bit fast. I was wondering Why this value (1000) doesn't give me an accurate 1 second timer. I found that setting the interval value at 1017 (1.7% longer) works very well.
I also noticed that if the timer enabled = false and is set again to false your app will crash. Setting enabled to true more than once will not cause a crash.

B4i Library CADisplayLink - A Timer that ticks on each display refresh

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