IOS UISearchDisplayController click to search for a black bar Problem Solution

Recently, the project encountered a very strange problem.

When you click the button to start presentViewController, the following results are displayed:

Code:

1. AddFriendViewController * addFriendVC = [[AddFriendViewController alloc] init];
2. UINavigationController * nav = [[UINavigationController alloc] initWithRootViewController: addFriendVC];
3. [Self presentViewController: nav animated: YES completion: nil];
4. [AddFriendVC release];
5. [Nav release];

It was later discovered that the background color of UINavigationController was black;

 

To solve the problem of black lines in TableView click Search:

Code:

1. AddFriendViewController * addFriendVC = [[AddFriendViewController alloc] init];
2. UINavigationController * nav = [[UINavigationController alloc] initWithRootViewController: addFriendVC];
3. [Nav. view setBackgroundColor: UIColorFromRGB (0xC6C6CB)];
4. [Self presentViewController: nav animated: YES completion: nil];
5. [AddFriendVC release];
6. [Nav release];

Changed the background color of Nav:

 

[Nav. view setBackgroundColor: UIColorFromRGB (0xC6C6CB)];

Effect: