替代子類化UITabBarController

Question

似乎UITabBarController不應該被子類化。你會如何推薦我在可旋轉的DetailView中實現TabBarController？

謝謝！

Answer 1

您可以將委託添加到您的控制器<UITabBarDelegate>，

創建的TabBar編程

UITabBar * aTabBar;

與UITabBarItems 填充它，然後實現這個功能來處理選項卡上的觸摸切換視圖

- (void)tabBar:(UITabBar *)tabBar didSelectItem:(UITabBarItem *)item 
{ 
} 

這是代碼的簡要部分

@interface yourTabsViewController : UIViewController <UITabBarDelegate> 
{ 
    UITabBar * mTabBar; 
    NSMutableDictionary * mControllerPerTab; 
} 
@end 

在您的實現：

- (void)viewDidLoad 
{ 
    mControllerPerTab = [[NSMutableDictionary alloc] init]; 
    [mControllerPerTab setValue:controller forKey:@"aKey"]; 
     UIImage *bImage = /*icon of tab*/; 
     UITabBarItem *item = [[UITabBarItem alloc] initWithTitle:@"title" image:bImage tag:/*a tag for your tab*/]; 
     [tabBarItems addObject:item]; 
    } 

    mTabBar = [[UITabBar alloc] initWithFrame:CGRectMake(0, self.view.bounds.size.height - 49/*tabbbar lenght*/ - 44/*navigationbar length if it exists*/, self.view.bounds.size.width ,49)]; 
    [mTabBar setItems:tabBarItems]; 
    mTabBar.delegate = self; 
    mTabBar.selectedItem = [tabBarItems objectAtIndex:0]; 
    [self tabBar:mTabBar didSelectItem:[tabBarItems objectAtIndex:0]]; 
    // Finally, add the tab controller view to the parent view 
    [self.view addSubview:mTabBar]; 
    [super viewDidLoad]; 
} 

然後你添加這個m方法來處理標籤的切換

- (void)tabBar:(UITabBar *)tabBar didSelectItem:(UITabBarItem *)item 
{ 
    int tag = [item tag]; 

    /*I'm using the tag to identify wich coltroller to open*/ 
    UIViewController * controller = [mControllerPerTab objectForKey:[NSString stringWithFormat:@"%d", tag]]; 
    controller.view.frame = CGRectMake(0,0,self.view.bounds.size.width,self.view.bounds.size.height - 49); 
    [self.view addSubview:controller.view]; 
    [self.view addSubview:mTabBar]; 
    [self.view autoresizesSubviews]; 
}