Question

There are a few tutorial about showing how to add a shadow to a UINavigation bar, but is there any method which would best suit adding this shadow application wide, rather than in a single instance?

Or is my only option to simply have a sub-classed nab bar in every single view of my application? Thought there might be a quicker, easier way than doing that?

Thanks.

Answer 1

Create a category of UINavigationBar called UINavigationBar+dropshadow.m and put this in the file

#import <QuartzCore/QuartzCore.h>

@interface UINavigationBar (dropshadow)

-(void) applyDefaultStyle;

@end

@implementation UINavigationBar (dropshadow)

-(void)willMoveToWindow:(UIWindow *)newWindow{
    [super willMoveToWindow:newWindow];
    [self applyDefaultStyle];
}

- (void)applyDefaultStyle { 
    // add the drop shadow
    self.layer.shadowColor = [[UIColor blackColor] CGColor];
    self.layer.shadowOffset = CGSizeMake(0.0, 3.0);
    self.layer.shadowOpacity = 0.25;
    self.layer.shouldRasterize = YES;
}
@end