strange flickering in the simulator about gmgridview

[gmoledina]

Not anymore! I saw it a few days ago but looks perfect now. Do you still see it ?

[steipete]

It was there yesterday. Will check again. The Simulator is not perfectly framebuffer-synced. Thus, if you maybe add a view and change it's frame one loop later, you get flickering in the simulator, but it looks perfect on the device.

[dxclancy]

i see what may look like rogue cells popping visible and then invisible very quickly. I don't know if this is inherent in the core code or in my layout strategy, but it sounds like it may be similar to what you mention. i'll update if i have more info.

[aquarius]

I saw the same problem. I was able to track it down to the UIViewAnimation part in -newItemSubViewForPosition:. However as steipete mentioned, the problem only appears in the simulator. Works fine for me on the device.

[steipete]

There is more to this. As the device has a better view sync, you usually don't see the flickering; but it's still visible some times. We should fix the root problem on this, it's ugly.

[soleares]

I'm seeing a glitch in the simulator only when I call -reloadData. This looks like it's caused by one of the latest commits "Put back an animation block to fix a glitch" in -newItemSubViewForPosition. When I revert this change I don't see the issue anymore.

[soleares]

I think the issue is due to the following in -newItemSubViewForPosition:

// To make sure the frame is not animated
[UIView animateWithDuration:0 
                      delay:0 
                    options:UIViewAnimationOptionOverrideInheritedDuration 
                 animations:^{
                     cell.frame = frame;
                     cell.contentView.frame = cell.bounds;
                 } 
                 completion:nil];

If I replace it with the following I don't see the issue anymore:

[CATransaction begin];
[CATransaction setValue:(id)kCFBooleanTrue
                 forKey:kCATransactionDisableActions];
cell.frame = frame;
cell.contentView.frame = cell.bounds;
[CATransaction commit];

[steipete]

soleares, thank you, this is very clever!

Will try it and replace the 0-delay blocks with this; i'm sure this also improves performance.

[steipete]

Works like a charm --> 22ec389

[gmoledina]

Great !!