UIInterfaceOrientation over iOS6 (应用旋转屏幕)

typedef NS_ENUM(NSInteger, UIInterfaceOrientation) {
    UIInterfaceOrientationUnknown            = UIDeviceOrientationUnknown,
    UIInterfaceOrientationPortrait           = UIDeviceOrientationPortrait,
    UIInterfaceOrientationPortraitUpsideDown = UIDeviceOrientationPortraitUpsideDown,
    UIInterfaceOrientationLandscapeLeft      = UIDeviceOrientationLandscapeRight,
    UIInterfaceOrientationLandscapeRight     = UIDeviceOrientationLandscapeLeft
};

UIInterfaceOrientation enum

使App支持旋转

有两种方法：

1.选择Project->Target->General->Deployment Info->Device Orientation，勾选需要支持的屏幕方向，比如

Portrait

Upside Down

Landscape Left

Landscape Right

2.在AppDelegate.m文件中，添加方法

- (NSUInteger)application:(UIApplication *)application supportedInterfaceOrientationsForWindow:(UIWindow *)window
{
    return UIInterfaceOrientationMaskPortrait|UIInterfaceOrientationMaskLandscape;
}

以上面中的设置为例

启动画面的方向取决于方法一，启动画面之后的Window方向取决于方法二，如果未实现方法二，则取决于方法一

大部分页面为Portrait，个别页面为Landscape

例如AppDelegate中的window的rootViewController为TabBarController，则TabBarController的ViewControllers的旋转方向都取决于TabBarController，因此需要在TabBarController中实现以下方法

#import "TYSXTabBarController.h"

#define kTabBarColor [UIColor colorWithRed:0.953f green:0.953f blue:0.953f alpha:1.00f]
#define kTintColor [UIColor colorWithRed:0.914f green:0.000f blue:0.294f alpha:1.00f]

@implementation TYSXTabBarController

- (void)viewDidLoad
{
    [super viewDidLoad];
    self.tabBar.translucent = NO;
    [self.tabBar setBarTintColor:kTabBarColor];
    self.tabBar.tintColor = kTintColor;
}

- (NSUInteger)supportedInterfaceOrientations
{
    return UIInterfaceOrientationMaskPortrait;
}

- (BOOL)shouldAutorotate
{
    return YES;
}

- (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation
{
    return UIInterfaceOrientationPortrait;
}
@end

TabBarController.m

这样，TabBarController下的所有页面就都只能是竖向了。

如何让某个页面只能是横向的呢？

以全屏播放页面(FullScreenViewController)为例，Present显示该页面，如此，播放页面就与TabBarController独立开了，在FullScreenViewController.m中实现以下方法

@implementation FullScreenViewController

- (NSUInteger)supportedInterfaceOrientations
{
    return UIInterfaceOrientationMaskLandscape;
}

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation
{
    return UIInterfaceOrientationIsLandscape(toInterfaceOrientation);
}

@end

FullScreenViewController.m