自定义标签栏背景图片 - 在iOS 4.x中

Question

I have made a tab bar iOS project, when I received the request to change the tab bar's background image to a custom image. The project is developed for iOS 4.x, so the iOS5's [tabBar setTabBarBackgroundImage:[UIImage imageNamed:@"custom.jpg"]] does not work. Can you suggest me some simple solutions (if there is any possibility, I would not like to change the entire project)?

Edit: Only three lines of code can resolve all:

UIImageView *imageView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"customImage.png"]];
[self.tabBarController.tabBar insertSubview:imageView atIndex:0];
[imageView release];

Answer 1

A possible solution would be to put an UIView with your background image exactly behind the UITabBar . Then lower the opacity of your tabbar to 0.5 so you can see the background-image coming through.

UIView *bckgrndView = [[UIView alloc] initWithFrame:CGRectMake(tabbar.frame.coords.x, tabbar.frame.coords.y, tabbar.frame.size.width, tabbar.frame.size.height)];
[bckgrndView setBackgroundImage:[UIImage imageNamed:@"custom.jpg"]];
[tabbar.superView insertSubView:bckgrndView belowSubview:tabbar];
tabbar.alpha = 0.5;
[bckgrndView release];

Sorry if my code contains some errors. I tried doing this by heart... But you'll catch the drift.

Answer 2

查看NGTabBarController ，一个带有可自定义背景图像的开源标签栏替换。

Answer 3

I have answered similar kind of question here . Hope it will help.