Synchronize CAEAGLLayer with UIKit views

Originator:nskboy
Number:rdar://14147019 Date Originated:13-Jun-2013 01:48 PM
Status:Open Resolved:
Product:iPhone SDK Product Version:7.0
Classification:Improvement Reproducible:Always
 
13-Jun-2013 01:48 PM Roman Busyghin:
Summary:
Currently it is impossible to recreate vector maps on iOS the same way MobileMaps.app does because of lack of synchronization between CAEAGLLayer and UIKit views.

Steps to Reproduce:
1. Run the attached sample in the iOS simulator
2. Pan scroll main app view

Expected Results:
Centers of white and red squares are synchronized

Actual Results:
There is a lag between red square and white square

Regression:
n/a

Notes:
You can fix this problem by using private method  -[CAEAGLLayer setAsynchronous:]. Pass NO and everything will work fine.

Comments

Related discussion: http://stackoverflow.com/questions/12967340/how-to-synchronize-opengl-drawing-with-uikit-updates Sample code: https://www.dropbox.com/s/vznzccibhlf8bon/simple_sample.zip

By nskboy at June 13, 2013, 8:53 p.m. (reply...)

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