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好了，所以，我想創建一個自定義標籤欄。我讀過一百篇教程，並下載了一半的示例代碼項目，這個問題似乎仍然存在於所有這些項目中。
我真的不想要一個自定義背景，我真正想要的按鈕佔據整個區域，所以沒有背景顯示。爲什麼當使用大小爲49像素（視網膜爲98像素）的圖像作爲背景和按鈕...標籤欄本身被放大並且蘋果增加的醜陋光芒是可見的？
這是我使用的代碼（在這裏發現棧）：
UIImage *selectedImage0 = [UIImage imageNamed:@"transactions_tab_btn_active"];
UIImage *unselectedImage0 = [UIImage imageNamed:@"transactions_tab_btn"];
UIImage *selectedImage1 = [UIImage imageNamed:@"bills_tab_btn_active"];
UIImage *unselectedImage1 = [UIImage imageNamed:@"bills_tab_btn"];
UIImage *selectedImage2 = [UIImage imageNamed:@"messages_tab_btn_active"];
UIImage *unselectedImage2 = [UIImage imageNamed:@"messages_tab_btn"];
UIImage *selectedImage3 = [UIImage imageNamed:@"reports_tab_btn_active"];
UIImage *unselectedImage3 = [UIImage imageNamed:@"reports_tab_btn"];
UITabBar *tabBar = self.tabBarController.tabBar;
UITabBarItem *item0 = [tabBar.items objectAtIndex:0];
UITabBarItem *item1 = [tabBar.items objectAtIndex:1];
UITabBarItem *item2 = [tabBar.items objectAtIndex:2];
UITabBarItem *item3 = [tabBar.items objectAtIndex:3];
UIImageView *tabBarImageView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"tab_bar"]];
if ([[[UIDevice currentDevice] systemVersion] floatValue] < 5) {
[tabBar insertSubview:tabBarImageView atIndex:0];
}else{
[tabBar insertSubview:tabBarImageView atIndex:1];
}
[item0 setFinishedSelectedImage:selectedImage0 withFinishedUnselectedImage:unselectedImage0];
[item1 setFinishedSelectedImage:selectedImage1 withFinishedUnselectedImage:unselectedImage1];
[item2 setFinishedSelectedImage:selectedImage2 withFinishedUnselectedImage:unselectedImage2];
[item3 setFinishedSelectedImage:selectedImage3 withFinishedUnselectedImage:unselectedImage3];
同樣，我可以刪除背景圖片，因爲它是對我沒有用的，但是沒有它，默認的黑色背景的標籤酒吧是可見的。兩者都不好。請幫助。