对于iPhone应用程序,如何以编程方式创建标签视图,最好是在Objective-C?
答案 0 :(得分:10)
通过UITabBarController创建UITabBar非常简单。以下示例应在AppDelegate类中起作用。
App代理接口
首先,在界面中,我们将定义UITabBarController。
UITabBarController *tabBarController;
应用代表实施
然后,在实现文件的application:didFinishLaunchingWithOptions:
方法中,我们将初始化我们的标签栏控制器。
// Initialise our tab bar controller
UITabBarController *tabBarController = [[UITabBarController alloc] init];
接下来,您需要创建要添加到选项卡栏控制器的视图控制器。我们需要在这些中添加一些信息来设置标签的标题/图标,但最后我会再回过头来看。
// Create your various view controllers
UIViewController *testVC = [[TestViewController alloc] init];
UIViewController *otherVC = [[OtherViewController alloc] init];
UIViewController *configVC = [[ConfigViewController alloc] init];
由于setViewControllers:animated:方法需要一组视图控制器,我们将视图控制器添加到数组中,然后释放它们。 (因为NSarray将保留它们。)
// Put them in an array
NSArray *viewControllers = [NSArray arrayWithObjects:testVC, otherVC, configVC, nil];
[testVC release];
[otherVC release];
[configVC release];
然后简单地为UITabBarController提供视图控制器数组并将其添加到我们的窗口。
// Attach them to the tab bar controller
[tabBarController setViewControllers:viewControllers animated:NO];
// Put the tabBarController's view on the window.
[window addSubview:[tabBarController view]];
最后,请务必在[tabBarController release];
方法中致电dealloc
。
查看控制器实施
在每个视图控制器中,您还需要在init方法中为选项卡设置标题和图标,如下所示:
// Create our tab bar item
UITabBarItem *tabBarItem = [self tabBarItem];
UIImage *tabBarImage = [UIImage imageNamed:@"YOUR_IMAGE_NAME.png"];
[tabBarItem setImage:tabBarImage];
[tabBarItem setTitle:@"YOUR TITLE"];
答案 1 :(得分:-1)
这就是我们必须以编程方式创建tabbar的方法
UINavigationController *BandNavigationController3;
AudienceSettingsViewController *audienceSettingsViewView =[[AudienceSettingsViewController alloc]initWithNibName:@"AudienceSettingsViewController" bundle:nil];
BandNavigationController3 = [[UINavigationController alloc]initWithRootViewController:audienceSettingsViewView];
BandNavigationController3.tabBarItem.title = @"Settings";
BandNavigationController3.tabBarItem.image = [UIImage imageNamed:@"settings.png"];
[BandNavigationController3.tabBarItem initWithTabBarSystemItem:UITabBarSystemItemFavorites tag:4];
BandNavigationController3.navigationBar.hidden = YES;
[bandTabBarArray addObject:BandNavigationController3];
[BandNavigationController3 release];
[audienceSettingsViewView release];
[tabBarController setViewControllers:bandTabBarArray];
[bandTabBarArray release];