寫一個控制器繼承自UITabBarController，
在該控制器的ViewDidLoad方法中加入如下代碼
// tabBarItem的圖片名稱
NSArray *images = @[@"tabBarItem_allTest_normal.png",@"tabBarItem_allTest_selected.png",@"tabBarItem_oneStation_normal.png",@"tabBarItem_oneStation_selected.png",@"tabBarItem_testResult_normal.png",@"tabBarItem_testResult_selected.png",@"tabBarItem_userCenter_normal.png",@"tabBarItem_userCenter_selected.png"];
for(int i= 0;i< 8;){
// 分別給tabBarItem設置圖片，圖片模式為源圖片
UITabBarItem *item = [self.tabBar.items objectAtIndex:i/2];
UIImage *normalImage = [UIImage imageNamed:images[i+1]];
normalImage = [normalImage imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
UIImage *selectImage = [UIImage imageNamed:images[i]];
selectImage = [selectImage imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
[item setFinishedSelectedImage:normalImage
withFinishedUnselectedImage:selectImage];
i+=2;
}
// 設置tabbar的選中和未選中的字體顏色
[[UITabBarItem appearance] setTitleTextAttributes:@{
NSForegroundColorAttributeName:[UIColor lightGrayColor]
} forState:UIControlStateNormal];
[[UITabBarItem appearance] setTitleTextAttributes:@{
NSForegroundColorAttributeName:[UIColor lightGrayColor]
} forState:UIControlStateSelected];