我需要实现以下内容,我想知道正确的方法.
当iPhone应用程序启动时,我需要显示2秒的徽标图像,然后显示允许此人登录或创建帐户的登录屏幕.一旦有人登录,我需要显示tabbarcontroller菜单选项.
这就是我目前正在做的事情:
在AppDelegate中:
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
LoginViewController *viewController0 = [[LoginViewController alloc] initWithNibName:@"LoginViewController" bundle:nil];
UINavigationController *aNavigationController0 = [[UINavigationController alloc] initWithRootViewController:viewController0];
self.window.rootViewController = aNavigationController0;
// I also implement an iVar of the UITabBarController here...
// ....
}
@implementation:
@implementation LoginViewController
- (IBAction)createNewAccountButtonClicked:(id)sender {
AppDelegate *delegate = [[UIApplication sharedApplication] delegate];
delegate.window.rootViewController = delegate.tabBarController;
}
所以,我的问题是:
>这是为我的目的显示标签栏的正确方法吗?
>在这个方案中,我无法显示动画徽标.有关如何做到这一点的任何指示?
最佳答案 下面的代码假设您正在使用ARC,如果您不使用ARC,则需要使用ARC.
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
// Override point for customization after application launch.
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
self.tabBarController = [[UITabBarController alloc] initWithNibName:nil bundle:nil];
self.window.rootViewController = self.tabBarController;
LoginViewController *loginViewController= [[LoginViewController alloc] initWithNibName:nil bundle:nil];
loginViewController.delegate = self;
UINavigationController *loginNavCont = [[UINavigationController alloc] initWithRootViewController:loginViewController];
[self.tabBarController presentModalViewController:loginNavCont animated:NO];
UIImageView *splashScreen = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"Default"]];
[self.window addSubview:splashScreen];
[UIView animateWithDuration:0.5
delay:2.0
options:0
animations:^{
splashScreen.alpha = 0.0;
}
completion:^(BOOL finished) {
[splashScreen removeFromSuperview];
}];
[self.window makeKeyAndVisible];
return YES;
}
- (void)loginViewControllerShouldBeDismissed:(UIViewController *)viewController
{
[self.tabBarController dismissModalViewControllerAnimated:YES];
}