Question

I am perfoming image sequences animation is on main thread.
At the same time i want to take snapshot of device screen in back ground.
And by using that snapshots i want make video..

Thanks,
Keyur Prajapati

Answer 1

For taking the screenshots while running the image animations

use


[self.view.layer.presentationLayer renderInContext:UIGraphicsGetCurrentContext()];


instead of


[self.view.layer renderInContext:UIGraphicsGetCurrentContext()];


it will take screenshots while runing animations

iOS uses Core Animation as the rendering system. Each UIView is backed by a CALayer. Each visible layer tree is backed by a presentation tree. The layer tree contains the object model values for each layer, i.e., values you set when you assign a value to a layer property (A and B). The presentation tree contains the values that are currently being presented to the user as an animation takes place (interpolated values between A and B).