如何更改 Xcode 中特定 ViewController 的方向

Question

我想更改 Xcode 中特定 ViewController 的方向。

我制作 a,b,cViewController 并仅将方向 cViewController 更改为 LandscapeRight。（a和b的方向是纵向）

但如果我改变 cViewController 的方向并将 ViewController 从 c 移动到 b，b 的方向也会更改为 LandscapeRight。（屏幕转换为推送）

代码：

a 和 bViewController 的 DidLoad

NSNumber *value = [NSNumber numberWithInt:UIInterfaceOrientationPortrait]; 
[[UIDevice currentDevice] setValue:value forKey:@"orientation"];

cViewController 的 DidLoad

NSNumber *value = [NSNumber numberWithInt:UIInterfaceOrientationLandscapeRight]; 
[[UIDevice currentDevice] setValue:value forKey:@"orientation"];

如何只改变方向 cViewController?

Answer 1

第 1 步

在您的 appdelegate 中创建一个 bool 属性，例如，这个

@property () BOOL restrictRotation;

并调用函数

-(UIInterfaceOrientationMask)application:(UIApplication *)application supportedInterfaceOrientationsForWindow:(UIWindow *)window
{
if(self.restrictRotation)
    return UIInterfaceOrientationMaskLandscape ;
else
    return UIInterfaceOrientationMaskPortrait;
}

第 2 步

并在 C VC

中导入 appdelegate #import "AppDelegate.h"

在你的C VC View 会出现，call like

-(void)viewWillAppear:(BOOL)animated{
// for rotate the VC to Landscape
[self restrictRotationwithNew:YES];
}

(void)viewWillDisappear:(BOOL)animated{
   // rotate the VC to Portait
  [self restrictRotationwithNew:NO];

[super viewWillDisappear:animated];
}


-(void) restrictRotationwithNew:(BOOL) restriction
{
AppDelegate* appDelegate = (AppDelegate*)[UIApplication sharedApplication].delegate;
appDelegate.restrictRotation = restriction;

}

选择2

在你的 C VC 上使用 UIDeviceOrientationDidChangeNotification

的委托函数检查方向

 [[NSNotificationCenter defaultCenter] addObserver:self  selector:@selector(orientationChanged:) name:UIDeviceOrientationDidChangeNotification  object:nil];



 - (void)orientationChanged:(NSNotification *)notification{


     [self adjustViewsForOrientation:[[UIApplication sharedApplication] statusBarOrientation]];


}

- (void) adjustViewsForOrientation:(UIInterfaceOrientation) orientation    {

UIDeviceOrientation deviceOrientation = [[UIDevice currentDevice] orientation];

switch (deviceOrientation) {
    case UIDeviceOrientationPortrait:

        NSLog(@"orientationPortrait");
       ;

        break;
    case UIDeviceOrientationPortraitUpsideDown:

        NSLog(@"UIDeviceOrientationPortraitUpsideDown");
        break;
    case UIDeviceOrientationLandscapeLeft:

        NSLog(@"OrientationLandscapeLeft");



        break;
    case UIDeviceOrientationLandscapeRight:

        NSLog(@"OrientationLandscapeRight");

        break;
    default:
        break;
}
}

如何更改 Xcode 中特定 ViewController 的方向

How to change the orientation of specific ViewController in Xcode

xcode

objective-c

orientation

ios