我希望首次启动我的应用程序。
我肯定会使用一些NSUserDefaults
。但我使用的是storyboards
,我想加载不同的viewControllers
来加载。
if(firstTime)
Load TourController
else
Load mainScreen
如何在appdelegate
?
答案 0 :(得分:1)
if (firstTime) {
self.window.rootViewController = self.fisrtController;
} else {
self.window.rootViewController = self.mainController;
}
答案 1 :(得分:1)
我在我的应用中首次启动时有不同的行为,但我没有在app delegate中实现它。我在委托中使用代码来跟踪启动次数。然后,由于主视图控制器需要位于视图树的顶部,因此我从那里以模态方式推送第一个启动行为。
- (void)applicationDidBecomeActive:(UIApplication *)application {
// the following forces new behaviour on 1st launch.
int launches;
launches = [[NSUserDefaults standardUserDefaults] integerForKey:LAUNCH_NUMBER_KEY];
// note: uninitialised user default returns 0.
if (!launches) {
// view did load will check again and push the first load tour.
// by returning here, the launch value is not incremented.
[self.viewController viewDidLoad];
return;
}
}
然后,在MainViewController viewDidLoad
中,我再次检查该值并以模态方式推送firstLoad视图。
- (void)viewDidLoad {
//... more code here.
BOOL disclaimerAccepted = [[NSUserDefaults standardUserDefaults] boolForKey:DISCLAIMER_ACCEPT_KEY];
if (!disclaimerAccepted) {
[self showFirstLoadView];
return;
}
}
和
-(void) showDisclaimerView {
// Display the nav controller modally.
FirstLoadVC *firstLoadVC = [[FirstLoadVC alloc] initWithNibName:@"firstload" bundle:[NSBundle mainBundle]];
[firstLoadVC autorelease];
UINavigationController* firstLoadNavController = [[UINavigationController alloc]initWithRootViewController:firstLoadVC];
[self presentModalViewController:firstLoadNavController animated:YES];
[firstLoadNavController release];
}