UITabBar selection indicator image is not taking whole size of tabBar height in ObjectiveC

Question

I am changing setSelectionIndicatorImage and when I run app on iOS 8, I get spacing between image and regular width of tabBar. Is there a way that I can match height of tab bar with setSelectionIndicatorImage? Also I get margin of few pixels on left side of first tab and right side of last tab, and I need to cover that with image too when tab is selected.

Answer 1

on didFinishLaunchingWithOptions put this code:

UITabBarController *tabBarContr = (UITabBarController *)self.window.rootViewController;

CGFloat tabBarItemWidth = self.window.rootViewController.view.bounds.size.width / tabBarContr.tabBar.items.count;
CGFloat tabBarItemHeight = CGRectGetHeight(tabBarContr.tabBar.frame);

UIView *selectedBottomView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, tabBarItemWidth, tabBarItemHeight)];

 CAGradientLayer *gradient = [CAGradientLayer layer];

gradient.colors = [NSArray arrayWithObjects:
                   (id)[UIColor blueButton].CGColor,
                   (id)[UIColor colorWithRed:0.08 green:0.54 blue:1 alpha:1].CGColor,
                   nil];

gradient.frame = selectedBottomView.bounds;

[selectedBottomView.layer insertSublayer:gradient atIndex:0];

UIGraphicsBeginImageContext(selectedBottomView.bounds.size);
[selectedBottomView.layer renderInContext:UIGraphicsGetCurrentContext()];

UIImage *image = UIGraphicsGetImageFromCurrentImageContext();

UIGraphicsEndImageContext();

tabBarContr.tabBar.selectionIndicatorImage = image;
tabBarContr.tabBar.translucent = YES;
tabBarContr.tabBar.tintColor = [UIColor whiteColor];

Note:take imageview instead of gradient