当前视图控制器不使用ios 9

当前视图控制器不能与ios 9一起使用，当我按下按钮时它没有重定向到当前视图控制器。

为什么会这样？

我曾尝试过以下代码

RegistrationViewController * viewController =[[UIStoryboard storyboardWithName:@"Registration" bundle:nil] instantiateViewControllerWithIdentifier:@"RegistrationViewController"]; [self presentViewController:viewController animated:YES completion:nil]; 

我也试过下面的代码

  UIStoryboard* storyboard = [UIStoryboard storyboardWithName:@"Registration" bundle:nil]; RegistrationViewController *add = [storyboard instantiateViewControllerWithIdentifier:@"RegistrationViewController"]; [self presentViewController:add animated:YES completion:^{ dispatch_async(dispatch_get_main_queue(), ^{ [self presentViewController:add animated:YES completion:nil]; }); }]; 

编辑

我的完整代码在这里。 我正在使用Xcode 7并使用ios 9运行它

 #import "LoginViewController.h" #import "RegistrationViewController.h" @interface LoginViewController () @end @implementation LoginViewController - (void)viewDidLoad { [super viewDidLoad]; // Do any additional setup after loading the view. } - (void)didReceiveMemoryWarning { [super didReceiveMemoryWarning]; // Dispose of any resources that can be recreated. } - (IBAction)actionRegistrationClicked:(id)sender { RegistrationViewController * viewController =[[UIStoryboard storyboardWithName:@"Registration" bundle:nil] instantiateViewControllerWithIdentifier:@"RegistrationViewController"]; [self presentViewController:viewController animated:YES completion:nil]; } @end 

注册视图控制器

 #import "RegistrationViewController.h" @interface RegistrationViewController () @end @implementation RegistrationViewController - (void)viewDidLoad { [super viewDidLoad]; // Do any additional setup after loading the view. } - (void)didReceiveMemoryWarning { [super didReceiveMemoryWarning]; // Dispose of any resources that can be recreated. } @end 

Answer 1

确保presentViewController为零。 如果presentViewController不是nil，则将代码更改为以下内容。

 RegistrationViewController * viewController =[[UIStoryboard storyboardWithName:@"Registration" bundle:nil] instantiateViewControllerWithIdentifier:@"RegistrationViewController"]; if ([self presentedViewController]) { [[self presentedViewController] dismissViewControllerAnimated:NO completion:^{ dispatch_async(dispatch_get_main_queue(), ^{ [self presentViewController:viewController animated:YES completion:nil]; }); }]; } else { [self presentViewController:viewController animated:YES completion:nil]; } 

Answer 2

有时主循环会出现错误，尝试以这种方式呈现

 RegistrationViewController *viewController = [[UIStoryboard storyboardWithName:@"Registration" bundle:nil] instantiateViewControllerWithIdentifier:@"RegistrationViewController"]; dispatch_async(dispatch_get_main_queue(), ^{ [self presentViewController:viewController animated:YES completion:nil]; }); 

Answer 3

尝试viewDidAppear in

  -(void)viewDidAppear:(BOOL)animated{ [self presentViewController:viewController animated:YES completion:nil]; } 

Answer 4

请尝试以下代码：

 RegistrationViewController * viewController = [[self.storyboard instantiateViewControllerWithIdentifier:@"RegistrationViewController"]; [self presentViewController:viewController animated:YES completion:nil];