quickly select two or more GridCell

[achoura]

Dear,
in my app, when the user select a cell , a new viewcontroller get pushed by the navigationController ,,, but I noticed when i quickly select two or more cell before the animation of pushing, the app crash due to not support of pushing the same viewcontroller twice . how can I disable the userInteraction for all the cells when on is clicked, and enable it back when the user pop back to the grid ?

[achoura]

I correct this by adding a Flag , so when i GridCell get tapped , i prevent pushing the viewcontroller
//- (void)gridView:(MMGridView *)gridView didSelectCell:(MMGridViewCell *)cell
if (!isPushed) {
isPushed = YES;