How to add a shadow effect for UINavigation bar - ios

Question

Hello, I want to add this kind of shadow for my NAvigationBar How can I do that.
This is how I tried to add shadow.
[self.navigationController.navigationBar setBackgroundImage:[UIImage new] forBarMetrics:UIBarMetricsDefault];
self.navigationController.navigationBar.shadowImage=[UIImage new];
self.navigationController.navigationBar.translucent=YES;
self.navigationController.navigationBar.topItem.titleView.tintColor=[UIColor whiteColor];
self.navigationController.navigationBar.titleTextAttributes=[NSDictionary dictionaryWithObject:[UIFont fontWithName:#"HelveticaNeue" size:15.0f] forKey:NSFontAttributeName];
self.navigationController.navigationBar.topItem.title=strNavigtionTitle;
self.navigationController.navigationBar.titleTextAttributes = [NSDictionary dictionaryWithObject:[UIColor whiteColor] forKey:NSForegroundColorAttributeName];
self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithImage:[UIImage imageNamed:#"backarrow"] style:UIBarButtonItemStylePlain target:self action:#selector(revealToggle :)];
[self.navigationController navigationBar].tintColor = [UIColor whiteColor];
[self.navigationController navigationBar].layer.shadowColor=[UIColor colorWithRed:53.0/255.0 green:108.0/255.0 blue:130.0/255.0 alpha:1.0f].CGColor;
[self.navigationController navigationBar].layer.shadowOffset=CGSizeMake(0, 20);
[self.navigationController navigationBar].layer.shadowOpacity=0.8;
[self.navigationController navigationBar].layer.shadowRadius=5.5;
But this only add a shadow for the arrow and my Apply Leave title. But I want to add a drop shadow like in this image.It should be between the NavigationBar and my main UIView How can I do this? Please help me.
Thanks

Answer 1

Here you'll need to import the QuartzCore framework.
self.navigationController.navigationBar.layer.borderColor = [[UIColor whiteColor] CGColor];
self.navigationController.navigationBar.layer.borderWidth = 2; //Set border you can see the shadow
self.navigationController.navigationBar.layer.shadowColor = [[UIColor blackColor] CGColor];
self.navigationController.navigationBar.layer.shadowOffset = CGSizeMake(1.0f, 1.0f);
self.navigationController.navigationBar.layer.shadowRadius = 3.0f;
self.navigationController.navigationBar.layer.shadowOpacity = 1.0f;
self.navigationController.navigationBar.layer.masksToBounds = NO;
Another thing
You have to
set self.layer.masksToBounds = NO;
The default value for this property is YES, which means that even though the shadow is rendered, it won't be rendered outside the bounds of the view, which means effectively that you don't see it at all.
If you're animating this view in any way, you should also add this line:
self.layer.shouldRasterize = YES;

Answer 2

self.navigationController.navigationBar.layer.shadowColor = [[UIColor blackColor] CGColor];
self.navigationController.navigationBar.layer.shadowOffset = CGSizeMake(2.0f, 2.0f);
self.navigationController.navigationBar.layer.shadowRadius = 4.0f;
self.navigationController.navigationBar.layer.shadowOpacity = 1.0f;

Answer 3

I could achieve that in this way. I removed adding a shadow to the Navigation bar. Instead of that I put a same size view under the navigation bar. Set the background color of it to to the navigation bar color. Then added the shadow for that view. This worked perfectly.
-(void)setupNavigationBar
{
[self.navigationController.navigationBar setBackgroundImage:[UIImage new] forBarMetrics:UIBarMetricsDefault];
self.navigationController.navigationBar.shadowImage=[UIImage new];
self.navigationController.navigationBar.translucent=YES;
self.navigationController.navigationBar.topItem.titleView.tintColor=[UIColor whiteColor];
self.navigationController.navigationBar.titleTextAttributes=[NSDictionary dictionaryWithObject:[UIFont fontWithName:#"HelveticaNeue" size:15.0f] forKey:NSFontAttributeName];
self.navigationController.navigationBar.topItem.title=strNavigtionTitle;
self.navigationController.navigationBar.titleTextAttributes = [NSDictionary dictionaryWithObject:[UIColor whiteColor] forKey:NSForegroundColorAttributeName];
self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithImage:[UIImage imageNamed:#"backarrow"] style:UIBarButtonItemStylePlain target:self action:#selector(revealToggle :)];
[self.navigationController navigationBar].tintColor = [UIColor whiteColor];
UIView *shadow=[[UIView alloc] initWithFrame:CGRectMake(0, 0, dm.screenWidth, 64)];
[shadow setBackgroundColor:[UIColor colorWithRed:62.0/255.0 green:81.0/255.0 blue:119.0/255.0 alpha:1.0]];
shadow.layer.shadowColor=[UIColor colorWithRed:51/255 green:76/255 blue:104/255 alpha:1.0].CGColor;
shadow.layer.shadowOffset=CGSizeMake(0, 15);
shadow.layer.shadowOpacity=0.12;
shadow.layer.shadowRadius=4.5;
[self.view addSubview:shadow];
}