在Ios7中處理特定ViewController的方向

Question

我正在創建一個電子書應用程序，在該應用程序中，我僅將所有方向都賦予了兩個ViewController。

我很想成功地將方向設置為兩個ViewController並第一次執行Rotation。但是后來當我用新書加載View Controller時，旋轉無法正常工作。

我用的方法：

  -(void)willRotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation
                           duration:(NSTimeInterval)duration{
  if(toInterfaceOrientation == UIInterfaceOrientationLandscapeLeft || toInterfaceOrientation == UIInterfaceOrientationLandscapeRight )    {
  //code for landscape
  }
  else{
   //code for protrait.
  }
  }

  - (BOOL)shouldAutorotate{
    return YES;
  } 
 - (NSUInteger)supportedInterfaceOrientations{
    return (UIInterfaceOrientationMaskAll);
 }

Answer 1

嘗試處理UINavigationControllers上的旋轉，UINavigationController子類上的確切代碼是正確的。 並確保將UIViewControllers設置為新UINavigationControllers的childViewControllers。 請記住，您需要在info.plist上使用鍵“支持的界面方向”來設置支持的方向。

Answer 2

創建UINavigationController的子類

@interface BaseNavigationController：UINavigationController

@結束

@implementation BaseNavigationController

    - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
        BOOL shouldAutorotateBool = NO;
        if ([self isRotate]) {
            if([[self.viewControllers lastObject] respondsToSelector:@selector(shouldAutorotate)])
                shouldAutorotateBool =  [[self.viewControllers lastObject] shouldAutorotate];
        }
        return shouldAutorotateBool;
    }


    // iOS6/7 support
    - (NSUInteger) supportedInterfaceOrientations {


        NSUInteger interfaceOrientation = UIInterfaceOrientationMaskPortrait;

        if ([self isRotate]) {
            if([[self.viewControllers lastObject] respondsToSelector:@selector(preferredInterfaceOrientationForPresentation)]) {
                interfaceOrientation = [[self.viewControllers lastObject]  preferredInterfaceOrientationForPresentation];
            }
        }
        return interfaceOrientation;
    }

    - (UIInterfaceOrientation) preferredInterfaceOrientationForPresentation {

        UIInterfaceOrientation interfaceOrientation = UIInterfaceOrientationPortrait;

        if ([self isRotate]) {
            if([[self.viewControllers lastObject] respondsToSelector:@selector(preferredInterfaceOrientationForPresentation)]) {
                interfaceOrientation = [[self.viewControllers lastObject]  preferredInterfaceOrientationForPresentation];
            }
        }
        return interfaceOrientation;

    }
    -(BOOL)shouldAutorotate
    {
        BOOL shouldAutorotateBool = NO;
        if ([self isRotate]) {
            if([[self.viewControllers lastObject] respondsToSelector:@selector(shouldAutorotate)])
                shouldAutorotateBool =  [[self.viewControllers lastObject] shouldAutorotate];
        }

        return shouldAutorotateBool;
    }

    -(BOOL) isRotate
    {
        if ([[self.viewControllers lastObject] isMemberOfClass:NSClassFromString(@"VideoVC")]) {
            return YES;
        }
        return NO;
    }
@end

在那個特定的viewController中：

#import "VideoVC.h"

@interface VideoVC ()

@end

@implementation VideoVC
#pragma mark- Methods for device orientation handling
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
    return YES;
}

- (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation {
    return UIInterfaceOrientationLandscapeLeft;
}
- (NSUInteger)supportedInterfaceOrientations
{
    return UIInterfaceOrientationMaskLandscapeLeft;
}
- (BOOL)shouldAutorotate
{
    return YES;
}

@end