IOS5: how to throw an exception for the rectForRowAtIndexPath method

Question

An exception:

error request for invalid pointer path

the code:

CGRect rect = [tableView rectForRowAtIndexPath:[NSIndexPath indexPathForRow:i inSection:0]];

Fix:

if ([tableView numberOfRowsInSection:0] <= i) {
    return;
}

Perhaps there is a better way

Answer 1

Normally, rectForRowAtIndexPath can treat invalid indexPaths as document states, but in iOS 7.1, it incorrectly processes an invalid index. Thus, passing to nil will fail and receive an error message:

error request if the pointer path is incorrect ({length = 2, path = 0 - 0})

In short, manually performing a nil check is necessary for rectForRowAtIndexPath.