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UITabBarItem 更改图像的高度和宽度

解决方法:

从苹果文档的最大大小的一张图片在 TabBar 是 30 x 30 (60 x 60 的视网膜显示器）。 我不认为它是可能采取整个 TabBar 不拉伸图像的高度。我认为最好的解决办法是中心中使用 imageInset TabBar 的图像

tabBarItem1.imageInsets = UIEdgeInsetsMake(6, 0, -6, 0);

img

否则你可以玩这 imageInset 和拉伸图像像在截图中

tabBarItem1.imageInsets = UIEdgeInsetsMake(0, -10, -6, -10);

img

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions  {


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

 UITabBar *tabBar = tabBarController.tabBar;
 UITabBarItem *tabBarItem1 = [tabBar.items objectAtIndex:0];
 UITabBarItem *tabBarItem2 = [tabBar.items objectAtIndex:1];
 UITabBarItem *tabBarItem3 = [tabBar.items objectAtIndex:2];

 //add image to tabbarItems

 tabBarItem1.imageInsets = UIEdgeInsetsMake(0, -10, -6, -10);
}