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