UITableView with transparent background has solid black border

I tried to set up a transparent background on my UITableView, b开发者_如何学JAVAut I have this black border.

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Any ideas?

[tableView setOpaque:NO];
[tableView setBackgroundColor:[UIColor clearColor]];

You just have to clear the background color.

tableView.backgroundColor = [UIColor clearColor];

Now you can see the background image behind the tableView.