Ios 如何根据条件设置初始视图控制器?
根据用户是否登录到服务器的条件显示不同的模板。如果用户未登录到应用程序服务器,则需要显示LoginViewController[Ios 如何根据条件设置初始视图控制器?,ios,objective-c,iphone,storyboard,Ios,Objective C,Iphone,Storyboard,根据用户是否登录到服务器的条件显示不同的模板。如果用户未登录到应用程序服务器,则需要显示LoginViewController[UIViewController],否则显示选项卡BarViewController[UITabBarViewController] 因为我是第一次使用故事板。有谁能建议我在情节提要中处理这种情况吗?您可以通过情节提要名称选择ViewController: UIStoryboard *yourStoryboard = [UIStoryboard storyboardW
UIViewController
],否则显示选项卡BarViewController[UITabBarViewController
]
因为我是第一次使用故事板。有谁能建议我在情节提要中处理这种情况吗?您可以通过情节提要名称选择ViewController:
UIStoryboard *yourStoryboard = [UIStoryboard storyboardWithName:@"yourstoryboard"
bundle:nil];
YourViewController *vc = [yourStoryboard instantiateViewControllerWithIdentifier:@"yourViewControllerIdentifier"];
然后显示
vc
在应用程序代理的应用程序中创建窗口和所需的初始视图控制器:didFinishLaunchingWithOptions:
方法:
self.window = [[UIWindow alloc] initWithFrame:UIScreen.mainScreen.bounds];
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"Main" bundle:nil];
if ([self isUserLoggedIn]) {
// Show the dashboard
self.window.rootViewController = [storyboard instantiateViewControllerWithIdentifier:@"TabBarViewcontroller"];
} else {
// Login
self.window.rootViewController = [storyboard instantiateViewControllerWithIdentifier:@"LoginViewController"];
}
[self.window makeKeyAndVisible];
我是这样做的
首先,创建名为LoginViewController的东西。它实现了您的登录逻辑。您的根控制器是uitabarcontroller
现在在AppDelegate中:
- (void) doLogin:(NSDictionary *)dict
{
TransactionsViewController *transactions;
BalancesViewController *balances;
ProfileViewController *profile;
UINavigationController *navi;
UITabBarController *root;
root = (UITabBarController *)self.window.rootViewController;
navi = [root.viewControllers objectAtIndex:0];
transactions = [navi.viewControllers objectAtIndex:0];
transactions.delegate = self;
navi = [root.viewControllers objectAtIndex:1];
balances = [navi.viewControllers objectAtIndex:0];
balances.delegate = self;
navi = [root.viewControllers objectAtIndex:2];
profile = [navi.viewControllers objectAtIndex:0];
profile.delegate = self;
[transactions loadDataFromLogin:dict];
[balances loadDataFromLogin:dict];
[profile loadDataFromLogin:dict];
}
- (void) showLoginView
{
assert(loginController == nil);
assert(activityView == nil);
UITabBarController *tabbar = (UITabBarController *)self.window.rootViewController;
loginController = [tabbar.storyboard instantiateViewControllerWithIdentifier:@"LoginViewController"];
loginController.delegate = self;
[tabbar presentModalViewController:loginController animated:YES];
}
- (void) loginWithLogin:(NSDictionary *)dict relogin:(BOOL)relogin
{
NSString *_login = [dict valueForKey:@"email"];
NSString *_pass = [dict valueForKey:@"pass"];
NetworkOperation *op = [NetworkOperation operationLogin:_login pass:_pass];
[NetworkOperation enqueueOperation:op observer:self];
if (!relogin && !loginController)
[self doLogin:dict];
}
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
session = nil;
loginController = nil;
return YES;
}
- (void)applicationDidBecomeActive:(UIApplication *)application
{
// Restart any tasks that were paused (or not yet started) while the application was inactive. If the application was previously in the background, optionally refresh the user interface.
NSString *login = [[NSUserDefaults standardUserDefaults] stringForKey:@"email"];
NSString *pass = [[NSUserDefaults standardUserDefaults] stringForKey:@"pass"];
NSString *name = [[NSUserDefaults standardUserDefaults] stringForKey:@"name"];
if ((login == nil || login.length == 0) ||
(pass == nil || pass.length == 0) ||
(name == nil || name.length == 0)) {
if (!loginController) {
[self.window makeKeyAndVisible];
[self performSelector:@selector(showLoginView) withObject:nil afterDelay:0.1];
}
} else {
NSDictionary *dict = [NSDictionary dictionaryWithObjectsAndKeys:login, @"email",
pass, @"pass", name, @"name", nil];
[self loginWithLogin:dict relogin:(session != nil)];
}
}
因此,您的应用程序代理会检查您是否存储了通行证和登录名。如果是,则使用它们登录并切换到根视图控制器。在我的例子中,它是选项卡式的,显示带有余额、交易等的两个选项卡
如果没有登录并通过,则在根视图控制器的顶部显示登录视图控制器
这里@session是您当前的会话。登录正在使用您在代码中看到的排队操作
如果您需要更多详细信息,只需ping我即可。UIStoryboard*storyboard=[UIStoryboard storyboard with name:@“Main”bundle:nil]; 如果([self isUserLoggedIn]){
//显示仪表板 self.window.rootViewController=[storyboard InstanceDeviceController WithiIdentifier:@“first”]; }否则{ //登录 self.window.rootViewController=[storyboard InstanceDeviceController WithiIdentifier:@“second”]; }可能重复的可能重复的