UICollectionView doesn't remove cells when the cell contains first responder

Originator:jnjosh
Number:rdar://13113345 Date Originated:30-Jan-2013 02:11 AM
Status:Open Resolved:
Product:iOS SDK Product Version:6.0/6.1
Classification:Bug Reproducible:Always
 
When using UICollectionView to display cells with a UITextField, there seems to be a problem with the dequeuing process where it will force the text field to resign and draw the cell multiple times. This only appears to happen when the cell has a subview with a first responder and that cell is scrolled off screen. The dequeue process seems to create a new cell but still adding the old view. You can see this if the cell has a partially transparent background view.

Sample Image:
http://f.cl.ly/items/412e233Z1q0O0y3b2821/Screen%20Shot%202013-01-29%20at%2011.54.16%20AM.png

Steps to Reproduce:

1. Create a project with a UICollectionView.
2. Add a cell with a text field
3. Set the cell to have a partially transparent image
4. Scroll the collection view forcing it do dequeue and reuse.

Expected Results:

Cells should be added once and not have mysterious cells in the background.

Actual Results:

It appears that multiple cells are stacked behind the current cell.

Regression:

n/a

Notes:

Sample code is available at: https://github.com/jnjosh/RadarSamples/tree/master/CollectionViewError

Comments


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