CAEmitterCell birthrate inaccurate in iOS 7

Originator:cfleser
Number:rdar://14413481 Date Originated:11-Jul-2013
Status:Open Resolved:
Product:iPhone SDK Product Version:7.0 (11A4414e)
Classification:UI/Usability Reproducible:YES
 
Summary:

Far too many emitter cells are being emitted when the emitterMode is set to kCAEmitterLayerOutline in iOS 7.

Steps to Reproduce:

Create an CAEmitterLayer / CAEmitterCell with the emitterMode set to kCAEmitterLayerOutline and note the difference in the number of particles emitted on iOS 7 versus iOS 6.

Expected Results:

Expect the number of particles emitted to be the same or nearly the same on iOS 7 as on iOS 6.

Actual Results:

Lots more particles are emitted on iOS 7. Really a lot.

Regression:

Problem does not occur on iOS 6.

Notes:

Note that I am also using an emitter layer elsewhere in the same application with the emitterMode left at the default value and the birthrate in that case seems correct. 

See also attached screenshots comparing explosions on iOS 6 versus iOS 7.

Comments


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