Question

我想首次打开应用时才显示屏幕教程。但问题是当我第一次导航到我的应用程序并返回rootviewcontroller所有时间显示教程屏幕。我想显示“菜单”屏幕。

如何在教程屏幕后将RootViewController设置为我的MenuViewController？

谢谢！

我在appdelegate.m中有这段代码：

self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
if ([[[NSUserDefaults standardUserDefaults] valueForKey:@"ISFIRSTTIME"] isEqualToString:@"NO"]) {
    controller = [[MenuViewController alloc] initWithNibName:@"MenuViewController" bundle:nil];
}
else {
    controller = [[TutorialViewController alloc] initWithNibName:@"TutorialViewController" bundle:nil];
}
_navController = [[UINavigationController alloc] initWithRootViewController:controller];
[self.window setRootViewController:_navController];

[self.window makeKeyAndVisible];

Answer 1

设置为else条件，

[[NSUserDefaults standardUserDefaults]setValue:@"NO" forKey:@"ISFIRSTTIME"];
[[NSUserDefaults standardUserDefaults] synchronize];

Answer 2

我在这个项目中这样做，

NSString *identifier;
BOOL isSaved = [[NSUserDefaults standardUserDefaults] boolForKey:@"loginSaved"];
if (isSaved)
{
    identifier=@"home1";

}
else
{
    identifier=@"dis1";
}
UIStoryboard *    storyboardobj=[UIStoryboard storyboardWithName:@"Main" bundle:nil];
UIViewController *screen = [storyboardobj instantiateViewControllerWithIdentifier:identifier];


[self.window setRootViewController:screen];

希望这会有所帮助：）

Answer 3

做类似的事情，

self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
if ([[[NSUserDefaults standardUserDefaults] valueForKey:@"ISFIRSTTIME"] isEqualToString:@"NO"]) {
    controller = [[MenuViewController alloc] initWithNibName:@"MenuViewController" bundle:nil];
}
else {
    controller = [[TutorialViewController alloc] initWithNibName:@"TutorialViewController" bundle:nil];
}
_navController = [[UINavigationController alloc] initWithRootViewController:controller];
[self.window setRootViewController:_navController];

[self.window makeKeyAndVisible];

//Setting "ISFIRSTTIME" to "NO" : it will be "NO" after first time you open the app

[[NSUserDefaults standardUserDefaults]setValue:@"NO" forKey:@"ISFIRSTTIME"];
[[NSUserDefaults standardUserDefaults] synchronize];

Answer 4

在其他情况下将NO设置为Nsuserdefault对象
将它与对象进行比较而不是方法。就像拿bool isfirsttime =你的NSuserdefault方法一样。使用 if（isfirsttime）

{} 其他 {}

第一次打开应用程序将所有时间转到教程屏幕

4 个答案: