很多程序需要开场动画,但仅仅用Default.png又满足不了自己的需求,如时间太短.解决其最好的办法就是加一个ViewController,我这起名为OpeningViewController.
在AppDelegate.h里面声明:
OpeningViewController *openingViewController;... @property (nonatomic, retain) OpeningViewController *openingViewController;
在AppDelegate.m中如下:
- (void)applicationDidFinishLaunching:(UIApplication *)application { if(openingViewController == nil) openingViewController = [[OpeningViewController alloc] initWithNibName:@"OpeningViewController" bundle:nil]; [window addSubview:openingViewController.view]; [window makeKeyAndVisible]; NSAutoreleasePool *pool=[[NSAutoreleasePool alloc] init]; [self performSelectorInBackground:@selector(removeOpeningView) withObject:nil]; [pool release]; return YES;}-(void) removeOpeningView{ NSAutoreleasePool *pool=[[NSAutoreleasePool alloc] init]; [NSThread sleepForTimeInterval:3]; //[[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleBlackTranslucent animated:YES]; [self setupUI]; [[UIApplication sharedApplication] setStatusBarHidden:NO animated:YES]; [pool release]; }在-(void) setupUI;中设置界面的UI.我这里是初始化一个带有导航(UINavigationController)的标签栏控制器(UITabBarController),如下:
-(void) setupUI { UIColor *titleBarColor=[UIColor colorWithRed:0.0/255.0 green:173.0/255.0 blue:238.0/255.0 alpha:1.0]; //TabBar Item 1 mainDirectoryViewController = [[MainDirectoryViewController alloc] initWithNibName:@"MainDirectoryViewController" bundle:nil]; if (mainDirNavController == nil) mainDirNavController = [[UINavigationController alloc] initWithRootViewController:mainDirectoryViewController]; mainDirNavController.navigationBar.tintColor = titleBarColor; //TabBar Item 2 bookmarkViewController = [[BookmarkViewController alloc] initWithNibName:@"BookmarkViewController" bundle:nil]; if (bookmarkNavController == nil) bookmarkNavController = [[UINavigationController alloc] initWithRootViewController:bookmarkViewController]; bookmarkNavController.navigationBar.tintColor = titleBarColor; //TabBar Item 3 aboutViewController = [[AboutViewController alloc] initWithNibName:@"AboutViewController" bundle:nil]; if (aboutNavController == nil) aboutNavController = [[UINavigationController alloc] initWithRootViewController:aboutViewController]; aboutNavController.navigationBar.tintColor = titleBarColor; UITabBarItem *customItem1 = [[UITabBarItem alloc] initWithTitle:@"学习" image:[UIImage imageNamed:@"some.png"] tag:0]; UITabBarItem *customItem2 = [[UITabBarItem alloc] initWithTitle:@"书签" image:[UIImage imageNamed:@"some.png"] tag:1]; UITabBarItem *customItem3 = [[UITabBarItem alloc] initWithTitle:@"关于" image:[UIImage imageNamed:@"some.png"] tag:2]; mainTabBar = [[UITabBarController alloc] init]; mainTabBar.delegate = self; mainTabBar.viewControllers = [NSArray arrayWithObjects:mainDirNavController, bookmarkNavController, aboutNavController, nil]; mainDirNavController.tabBarItem = customItem1; bookmarkNavController.tabBarItem = customItem2; aboutNavController.tabBarItem = customItem3; [customItem1 release]; [customItem2 release]; [customItem3 release]; [window addSubview:mainTabBar.view];}