IOS 7中UINavigationBar下的白线

Question

I have a UITableViewController with a UISearchDisplayController and UISearchBar . I'm seeing a white line under the navbar when I present the view in a UITabBarController . When I present the view modally in a UINavigationController , the line is either gray or black (I can't tell) and it looks perfectly normal. Any ideas?

Answer 1

I had the same problem, couldn't figure out from where it did came from (it was present everywhere and it was NOT the shadowImage ), ended up with the following fix (in my UINavigationController subclass)

// Fixes strange line under NavigationBar
{
    UIView * view = [[UIView alloc] init];
    view.backgroundColor = self.navigationBar.barTintColor;
    CGRect rect = view.frame;
    rect.origin.x = 0.f;
    rect.origin.y = self.navigationBar.frame.size.height;
    rect.size.width = self.navigationBar.frame.size.width;
    rect.size.height = 1.f;
    view.frame = rect;
    [self.navigationBar addSubview:view];
}

Answer 2

I had the same problem too, after trying with a lot of methods,I find this way solved my problem

[[UISearchBar appearance] setBackgroundColor:[UIColor yourColor]];

write it in your viewDidLoad.

Answer 3

尝试将UISearchBar上的clipsToBounds属性设置为YES。

Answer 4

The white line is probably the shadowImage of navigation bar.

Try setting it as:

self.navigationController.navigationBar.shadowImage = [UIImage new];

Answer 5

Use following line of the code :

UIView *overlayView = [[UIView alloc] initWithFrame:CGRectMake(0, 43, 320, 1)];
[overlayView setBackgroundColor:[UIColor whiteColor]];   // set color accordingly
[navBar addSubview:overlayView]; // navBar is your UINavigationBar instance
[overlayView release];

here is my posted Answer : Horizontal Separator NavBar IOS 7

How to remove UINavigatonItem's border line

Answer 6

Swift version of Divya's answers

    let hideLineView = UIView(frame: CGRect(x: 0, y: navigationController!.navigationBar.frame.size.height, width: view.frame.size.width, height: 1))
    hideLineView.backgroundColor = UIColor.white
    navigationController!.navigationBar.addSubview(hideLineView)