某些視圖控制器的固定方向

Question

在我的應用程序中，我既有tabbar也有navigationBar。 rootview控制器的tabbar和tabbar有4個導航控制器。

我想讓一些viewcontrollers只是肖像。這可能是一個常見的問題，但我已經嘗試過了，但我無法解決這個問題。

如何使一些視圖控制器的縱向方向？

Answer 1

我已經解決了這個問題並回答了，如果有人遇到同樣的問題，他們可以得到幫助。

shouldAutorotate, supportedInterfaceOrientations, preferredInterfaceOrientationForPresentation 

如果上述方法位於navigationcontroller的任何tabbarcontroller中，則不會調用viewcontroller。如果這些方法在tabbarcontroller或導航控制器內部聲明，那麼它們將被調用。在我的例子中，viewcontrollers在navigationcontroller裏面，導航控制器在tabbarcontroller裏面。

爲了解決這個問題，我創建了一個類FixedOrientationTab，它是UITabBarController的一個子類，以及導航類OrientationEnabledNavigation，它是UINavigationController的一個子類。然後我在FixedOrientationTab和OrientationEnabledNavigation中實現了shouldAutorotate, supportedInterfaceOrientations, preferredInterfaceOrientationForPresentation方法。

OrientationEnabledNavigation.h

#import <UIKit/UIKit.h> 

@interface OrientationEnabledNavigation : UINavigationController 

@end 

OrientationEnabledNavigation.m

#import "OrientationEnabledNavigation.h" 

@interface OrientationEnabledNavigation() 

@end 

@implementation OrientationEnabledNavigation 

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil 
{ 
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]; 
    if (self) { 
     // Custom initialization 
    } 
    return self; 
} 

- (void)viewDidLoad 
{ 
    [super viewDidLoad]; 
    // Do any additional setup after loading the view. 
} 

- (BOOL)shouldAutorotate 
{ 
    return [self.topViewController shouldAutorotate]; 
// return NO; 
} 

- (NSUInteger)supportedInterfaceOrientations 
{ 
    return [self.topViewController supportedInterfaceOrientations]; 
} 

- (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation 
{ 
    return [self.topViewController preferredInterfaceOrientationForPresentation]; 
} 

- (void)didReceiveMemoryWarning 
{ 
    [super didReceiveMemoryWarning]; 
    // Dispose of any resources that can be recreated. 
} 

@end 

FixedOrientationTab.h

#import <UIKit/UIKit.h> 

@interface FixedOrientationTab : UITabBarController 

@end 

FixedOrientationTab.m

#import "FixedOrientationTab.h" 

@interface FixedOrientationTab() 

@end 

@implementation FixedOrientationTab 

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil 
{ 
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]; 
    if (self) { 
     // Custom initialization 
    } 
    return self; 
} 

- (void)viewDidLoad 
{ 
    [super viewDidLoad]; 
    // Do any additional setup after loading the view. 
} 

- (BOOL)shouldAutorotate 
{ 
    return [self.selectedViewController shouldAutorotate]; 
    // return NO; 
} 

- (NSUInteger)supportedInterfaceOrientations 
{ 
    return [self.selectedViewController supportedInterfaceOrientations]; 
} 

- (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation 
{ 
    return [self.selectedViewController preferredInterfaceOrientationForPresentation]; 
} 


- (void)didReceiveMemoryWarning 
{ 
    [super didReceiveMemoryWarning]; 
    // Dispose of any resources that can be recreated. 
} 

@end 

然後，如果你想在你的項目中使用導航控制器，然後使用OrientationEnabledNavigation和的TabBar FixedOrientationTab。之後，如果您在視圖控制器中實現了shouldAutorotate, supportedInterfaceOrientations, preferredInterfaceOrientationForPresentation這些方法，那麼它們將被調用。

希望這會有所幫助.. :)