Position of navigation bar for modal view - iOS7

The best way to overcome this in iOS 7 is by conforming to the new UIBarPositioningDelegate protocol.

You connect the delegate of your NavigationBar to your view controller (set your view controller as the delegate for the navigation bar either through storyboard or through code) and conform to that protocol and by implementing the method

-(UIBarPosition)positionForBar:(id<UIBarPositioning>)bar { return UIBarPositionTopAttached; }

You can remove the top gap in the view controller. You need to place the bar 20 points below the top edge

In Swift:

The best way to overcome this in iOS 8.1 and Swift is by conforming to the new UIBarPositioningDelegate protocol.

You connect the delegate of your NavigationBar to your view controller and conform to that protocol and by calling the method:

func positionForBar(bar: UIBarPositioning) -> UIBarPosition  {
    return UIBarPosition.TopAttached
}

You can remove the top gap in the view controller. You need to place the bar 20 points below the top edge.

Figured out the 3 options for solving this problem.

Option 1: Resize the Nav Bar

float currentVersion = 7.0;
if ([[[UIDevice currentDevice] systemVersion] floatValue] >= currentVersion) {
    // iOS 7
    self.navBar.frame = CGRectMake(self.navBar.frame.origin.x, self.navBar.frame.origin.y, self.navBar.frame.size.width, 64);
}

Option 2: Hide the Status Bar

For example, in the modal view where you want to hide the status bar

Add this method

- (BOOL)prefersStatusBarHidden
{
    return YES;
}

In viewDidLoad add

float currentVersion = 7.0;

if ([[[UIDevice currentDevice] systemVersion] floatValue] >= currentVersion) {
    [self prefersStatusBarHidden];
    [self performSelector:@selector(setNeedsStatusBarAppearanceUpdate)];
}
else {
    [[UIApplication sharedApplication] setStatusBarHidden:YES withAnimation:UIStatusBarAnimationSlide];
}

Now, when you dismiss the modal view, and you want your status bar back. Add this in viewWillAppear

    float currentVersion = 7.0;

if ([[[UIDevice currentDevice] systemVersion] floatValue] >= currentVersion) {
    [self prefersStatusBarHidden];
    [self performSelector:@selector(setNeedsStatusBarAppearanceUpdate)];
    NSLog(@"ios7");
}
else {
    [[UIApplication sharedApplication] setStatusBarHidden:NO withAnimation:UIStatusBarAnimationSlide];
}

and this, but return NO this time

- (BOOL)prefersStatusBarHidden
{
    return NO;
}

Option 3: Embed in Nav Controller

Select your modal view, just embed that in a Navigation Controller.

For Swift3 use following..

func position(for bar: UIBarPositioning) -> UIBarPosition{
    return .topAttached;
}