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POChanging UIButton backgroundImage when selected on a UITabBar
 

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  1. POChanging UIButton backgroundImage when selected on a UITabBar
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    <p>So I have a UIButton in the middle of my UITabBar in order to mimic, instagram's UITabBar Here's the code (code can also be taken from github <a href="https://github.com/boctor/idev-recipes/tree/master/RaisedCenterTabBar" rel="nofollow">here</a>).</p> <pre><code>@interface BaseViewController : UITabBarController { } // Create a view controller and setup it's tab bar item with a title and image -(UIViewController*) viewControllerWithTabTitle:(NSString*)title image:(UIImage*)image; // Create a custom UIButton and add it to the center of our tab bar -(void) addCenterButtonWithImage:(UIImage*)buttonImage highlightImage:(UIImage*)highlightImage; @end #import "BaseViewController.h" @implementation BaseViewController // Create a view controller and setup it's tab bar item with a title and image -(UIViewController*) viewControllerWithTabTitle:(NSString*) title image:(UIImage*)image { UIViewController* viewController = [[[UIViewController alloc] init] autorelease]; viewController.tabBarItem = [[[UITabBarItem alloc] initWithTitle:title image:image tag:0] autorelease]; return viewController; } // Create a custom UIButton and add it to the center of our tab bar -(void) addCenterButtonWithImage:(UIImage*)buttonImage highlightImage:(UIImage*)highlightImage { UIButton* button = [UIButton buttonWithType:UIButtonTypeCustom]; button.autoresizingMask = UIViewAutoresizingFlexibleRightMargin | UIViewAutoresizingFlexibleLeftMargin | UIViewAutoresizingFlexibleBottomMargin | UIViewAutoresizingFlexibleTopMargin; button.frame = CGRectMake(0.0, 0.0, buttonImage.size.width, buttonImage.size.height); [button setBackgroundImage:buttonImage forState:UIControlStateNormal]; [button setBackgroundImage:highlightImage forState:UIControlStateHighlighted]; [button setBackgroundImage:highlightImage forState:UIControlStateSelected]; CGFloat heightDifference = buttonImage.size.height - self.tabBar.frame.size.height; if (heightDifference &lt; 0) button.center = self.tabBar.center; else { CGPoint center = self.tabBar.center; center.y = center.y - heightDifference/2.0; button.center = center; } [self.view addSubview:button]; } - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation { return YES; } @end </code></pre> <p>If you fork the github link above and run the DailyBoothViewController example, pressing the middle button will have it highlighted. Now what I want is that for the highlight to stay when the button is pressed, in other words I want to change the backgroundImage of the button when the state of the button is selected. I did do that via code, however it isn't changing the button image. Why is this?</p>
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