UICollectionView with ContentInset is not Scrolling all the Way Down

Question

I am setting the content inset of a UICollectionView:

[_collectionView setContentInset:UIEdgeInsetsMake(0.f, 0.f, 100.f, 0.f)];

Then I am s

Answer 1

Possible Issue

You have set the collectionView below the toolbar and added constraints to bottom of superview for both views.

Solution

Set the constraints of the toolbar to bottom, leading and set the width and height to fixed size. For your collectionView set the constraints to top, to bottom with the toolbar, leading to the superview and (alternative) with fixed size of width

Update

CollectionView

Follow these steps to make it work:

Check your collection view, and don't put it below toolbar, and add these constraints by selecting your collectionView on Document Outline, click ctrl and drag it to your view, a popup will appear, hold shift and select these constraints.

Toolbar

Check the leading and bottom, by dragging with ctrl in view. And add fixed width and height for toolbar.

Dealing with scrolling before viewAppears

-(void)viewWillAppear:(BOOL)animated
{
    [collectionView reloadData];
    [self scrollToLastMessageAnimated:YES];
}