Setting custom UITabBarItem programmatically?

问题

In iOS, the TabBar property in the TabBarController is read only. How can I associate a custom item with a particular view controller? How do I access the UITabBarItems inside the tabBar?

Like this

CustomView *custom = [[CustomView alloc] init];
UITabBarItem *customTab = [[UITabBarItem alloc] initWithTitle:@"Custom" image:[UIImage imageNamed:@"custom.png"] tag:0];
SecondView *second = [[SecondView alloc] init];
UITabBarItem *secondTab = [[UITabBarItem alloc] initWithTitle:@"Next" image:[UIImage imageNamed:@"next.png"] tag:1];
NSArray *views = [NSArray arrayWithObjects:custom,second,nil];
[tabBarController setViewControllers:views];
//how do I set the individual TabBarItems (customTab,secondTab) to be associated
//with the views in question?  tabBarController.tabBar is read only

回答1:

Inside each view controller, you can set a tabBarItem property. If the view controller is owned by a UITabBarViewController the associated item on the tab bar will be updated accordingly.

Something like this

-(void)viewDidLoad {
    [super viewDidLoad];
    UITabBarItem *tbi = [[UITabBarItem alloc] initWithTitle:yourTitle image:yourIcon tag:yourTag];
    [self setTabBarItem:tbi]
    [tbi release];
}

You are not restricted to perform this operation in the viewDidLoad method, obviously.

来源：https://stackoverflow.com/questions/3907926/setting-custom-uitabbaritem-programmatically