Cannot show modal ViewController in iOS7

Question

I tried to show system defined viewcontrollers (MFMailComposeViewController, TWTweetComposeViewController,etc..) as a modal view.

But these viewcontrollers dosn\'t a

Answer 1

In My case, following code will cause the same issue on 64bit machine or simulator. Hope for helping someone met this issue.

if ([UITableViewCell instancesRespondToSelector:@selector(setSeparatorInset:)]) {
    [[UITableViewCell appearance] setSeparatorInset:UIEdgeInsetsZero];
}