Transparent background in grouped UITableView - iPhone - iphone

Question

I want to make the grouped UITableView transparent. I partially succeded with the following code:
UIColor *bgColor = [[UIColor alloc] initWithWhite:1 alpha:0.0];
historyTable.backgroundColor = bgColor;
Unfortunately, black corners appeared in the rounded cells. How to get rid of them?

Answer 1

Instead of using
UIColor *bgColor = [[UIColor alloc] initWithWhite:1 alpha:0.0];
historyTable.backgroundColor = bgColor;
Just use:
historyTable.backgroundColor = [UIColor clearColor];
That also clears up the memory leak you were creating.

Answer 2

remove UITableView backgroundView
xxx.backgroundView = nil;
This is necessary on iPad builds. When compiling to run on iPad and iPhone, check the tableView responds to the selector with ...
if ([self.tableView respondsToSelector:#selector(setBackgroundView:)]) {
[self.tableView setBackgroundView:nil];
}

Answer 3

for me it worked finaly after setting both to nil/clear:
[myTableView setBackgroundView:nil];
[myTableView setBackgroundColor:[UIColor clearColor]];

Answer 4

I had this issue and found that there was no difference between using:
[[UIColor alloc] initWithWhite:1 alpha:0.0];
and using:
[UIColor clearColor];
I tried both of these and still had the little black corners on my table view.
I also tried setting the backgroundView to nil as suggested, but this didn't work either.
I solved this by setting the backgrounds of the individual cells to transparent in the cellForRowAtIndexPath method:
cell.backgroundColor = [UIColor clearColor];
Of course, this has the side effect that your cells themselves are transparent, which isn't ideal for everyone, but it ok for me in this case.