![](/img/trans.png)
[英]Adding UITabBarItem to UITabBar programmatically, and set action to it
[英]Adding UITabBarItem to a UITabBar in a UIViewController
所以我有一個UIViewController
在視圖中有一個UITabBar
。 我想下拉JSON並確定我想要添加到選項卡欄的選項卡,所以我需要能夠在運行時選擇選項卡。 我想使用UITabBarController setViewControllers:animated:
方法向其中添加一個視圖控制器列表。 但是,由於我在視圖控制器中執行此操作,因此我不知道如何訪問選項卡欄的視圖控制器。 這是我的代碼......
頭
#import <UIKit/UIKit.h>
@interface HealthTicketTabController : UIViewController <UITabBarDelegate, UITabBarControllerDelegate> {
NSArray *viewControllers;
IBOutlet UITabBar *tabBar;
UIViewController *selectedViewController;
// How do I link this the the tabBar's view controller???
UITabBarController *tabBarController;
}
@property (nonatomic, retain) NSArray *viewControllers;
@property (nonatomic, retain) IBOutlet UITabBar *tabBar;
@property (nonatomic, retain) IBOutlet UITabBarController *tabBarController;
@property (nonatomic, retain) UIViewController *selectedViewController;
@end
資源
- (id)init
{
self = [super initWithNibName:@"HealthTicketTabView" bundle:nil];
if (self)
{
//Controllers for the tab view
HealthCardController *card = [[HealthCardController alloc] init];
MedicalExpensesController *medical = [[MedicalExpensesController alloc] init];
//Tab bar items to be displayed in the tab bar
card.tabBarItem = [[UITabBarItem alloc] initWithTabBarSystemItem:UITabBarSystemItemMostViewed tag:0];
medical.tabBarItem = [[UITabBarItem alloc] initWithTabBarSystemItem:UITabBarSystemItemMostViewed tag:1];
NSArray *array = [[NSArray alloc] initWithObjects:card, medical, nil];
//Set the tab bar's view controllers to the list
tabBarController.viewControllers = [NSArray arrayWithObjects:card, medical, nil];
[array release];
[card release];
[medical release];
}
return self;
}
UIViewController已經有一個tabBarController屬性。 您的頭文件中不需要一個。 這是您可以訪問UITabBarController的方法。
發現由於我使用UIViewController
來控制UITabBar
我需要將標簽欄的委托設置為當前的UIViewController
並處理當前控制器中的tab事件。
將TabBarItems添加到TabBar
[self.tabBar setItems: tabBarItems animated:TRUE];
在ViewControllers之間切換
- (void)tabBar:(UITabBar *)tabBar didSelectItem:(UITabBarItem *)item
{
UIViewController *temp = [viewControllers objectAtIndex:item.tag];
[self.selectedViewController.view removeFromSuperview];
[self.view addSubview:temp.view];
self.selectedViewController = temp;
}
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.