问题解决：iOS6下UIWebView嵌vedio标签播放视频屏幕不旋转

项目默认为竖屏，在iOS6下UIWebView嵌Vedio标签播放视频屏幕不旋转，iOS5没有问题。

一、版本判断宏

// iOS版本===
#define SYSTEM_VERSION_EQUAL_TO(v) ([[[UIDevice currentDevice] systemVersion] compare:v options:NSNumericSearch] == NSOrderedSame)
#define SYSTEM_VERSION_GREATER_THAN(v) ([[[UIDevice currentDevice] systemVersion] compare:v options:NSNumericSearch] == NSOrderedDescending)
#define SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(v) ([[[UIDevice currentDevice] systemVersion] compare:v options:NSNumericSearch] != NSOrderedAscending)
#define SYSTEM_VERSION_LESS_THAN(v) ([[[UIDevice currentDevice] systemVersion] compare:v options:NSNumericSearch] == NSOrderedAscending)
#define SYSTEM_VERSION_LESS_THAN_OR_EQUAL_TO(v) ([[[UIDevice currentDevice] systemVersion] compare:v options:NSNumericSearch] != NSOrderedDescending)
// ===iOS版本

二、首先，在UIWebView所在controller下面开启屏幕旋转支持，iOS5点击UIWebView中vedio标签，播放器可以自动旋转；iOS6不行

#pragma mark - Rotation
// IOS5支持的屏幕方向
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
    return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown);
}

// IOS6开启旋转
- (BOOL)shouldAutorotate {
    return YES;
}
// IOS6支持的屏幕方向
- (NSUInteger)supportedInterfaceOrientations {
    return UIInterfaceOrientationMaskAllButUpsideDown;
}
// IOS6默认支持竖屏
- (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation {
    return UIInterfaceOrientationPortrait;
}

三、接着，为了解决iOS6下点击UIWebView中vedio标签，播放器可以不旋转的问题，需要注册播放器进入全屏和退出全屏的通知

if (SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(@"6")) {
        [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(vedioStarted:) name:@"UIMoviePlayerControllerDidEnterFullscreenNotification" object:nil];// 播放器即将播放通知
        [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(vedioFinished:) name:@"UIMoviePlayerControllerDidExitFullscreenNotification" object:nil];// 播放器即将退出通知
    }

四、再接着，通知事件处理，手工旋转屏幕，播放设为横屏左，退出设为竖屏——这里使用了私有api，有审核不过风险。

- (void)vedioStarted:(NSNotification *)notification {// 播放器即将播放处理
    [[UIDevice currentDevice] performSelector:@selector(setOrientation:) withObject:(id)UIDeviceOrientationLandscapeLeft];// iOS6只能选择一个横屏方向，暂时实现不了检测屏幕旋转而旋转
}
- (void)vedioFinished:(NSNotification *)notification {// 视频
    [[UIDevice currentDevice] performSelector:@selector(setOrientation:) withObject:(id)UIDeviceOrientationPortrait];// 屏幕方向回复默认的竖屏
}

五、最后，记得移除通知的观察者

- (void)dealloc {
    if (SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(@"6")) {
        [[NSNotificationCenter defaultCenter] removeObserver:self name:@"UIMoviePlayerControllerDidEnterFullscreenNotification" object:nil];
        [[NSNotificationCenter defaultCenter] removeObserver:self name:@"UIMoviePlayerControllerDidExitFullscreenNotification" object:nil];
    }
}

参考： http://www.cocoachina.com/bbs/read.php?tid=137339&keyword=UIWebView%7Cvideo和 http://stackoverflow.com/a/8554040/966127

完整代码：里面用到UIWebView开源浏览器SVWebViewController(下载地址：https://github.com/samvermette/SVWebViewController)

BLWebVC.h

#import <UIKit/UIKit.h>

@class SVWebViewController;

@interface BLWebVC : UINavigationController
- (id)initWithAddress:(NSString*)urlString;
- (id)initWithURL:(NSURL *)URL;
@property (nonatomic, retain) UIColor *barsTintColor;
@end

BLWebVC.m

//
//  BLWebVC.m
//  XXX
//
//  Created by yhw on 13-3-29.
//
//

#import "BLWebVC.h"
#import "SVWebViewController.h"

@interface BLWebVC ()
@property (nonatomic, retain) SVWebViewController *webViewController;
@end

@implementation BLWebVC

- (void)dealloc {
    if (SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(@"6")) {
        [[NSNotificationCenter defaultCenter] removeObserver:self name:@"UIMoviePlayerControllerDidEnterFullscreenNotification" object:nil];
        [[NSNotificationCenter defaultCenter] removeObserver:self name:@"UIMoviePlayerControllerDidExitFullscreenNotification" object:nil];
    }
    [_barsTintColor release];
    //
    [_webViewController release];
    [super dealloc];
}

- (void)loadView {
    [super loadView];
    //
//    self.view.backgroundColor = [UIColor whiteColor];
}

- (void)viewDidLoad
{
    if (SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(@"6")) {
        [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(vedioStarted:) name:@"UIMoviePlayerControllerDidEnterFullscreenNotification" object:nil];// 播放器即将播放通知
        [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(vedioFinished:) name:@"UIMoviePlayerControllerDidExitFullscreenNotification" object:nil];// 播放器即将退出通知
    }
}

- (void)vedioStarted:(NSNotification *)notification {// 播放器即将播放处理
    [[UIDevice currentDevice] performSelector:@selector(setOrientation:) withObject:(id)UIDeviceOrientationLandscapeLeft];// iOS6只能选择一个横屏方向，暂时实现不了检测屏幕旋转而旋转
}
- (void)vedioFinished:(NSNotification *)notification {// 视频
    [[UIDevice currentDevice] performSelector:@selector(setOrientation:) withObject:(id)UIDeviceOrientationPortrait];// 屏幕方向回复默认的竖屏
}
#pragma mark - Initialization
- (id)initWithAddress:(NSString*)urlString {
    return [self initWithURL:[NSURL URLWithString:urlString]];
}

- (id)initWithURL:(NSURL *)URL {
    self.webViewController = [[[SVWebViewController alloc] initWithURL:URL] autorelease];
    if (self = [super initWithRootViewController:self.webViewController]) {
        self.webViewController.navigationItem.leftBarButtonItem = [[[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemDone target:webViewController action:@selector(doneButtonClicked:)] autorelease];
    }
    return self;
}
#pragma mark - Setters
- (void)setBarsTintColor:(UIColor *)barsTintColor {
    if (_barsTintColor != barsTintColor) {
        [_barsTintColor release];
        _barsTintColor = [barsTintColor retain];
    }
    self.navigationBar.tintColor = _barsTintColor;
}
#pragma mark - Rotation
// IOS5支持的屏幕方向
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
    return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown);
}

// IOS6开启旋转
- (BOOL)shouldAutorotate {
    return YES;
}
// IOS6支持的屏幕方向
- (NSUInteger)supportedInterfaceOrientations {
    return UIInterfaceOrientationMaskAllButUpsideDown;
}
// IOS6默认支持竖屏
- (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation {
    return UIInterfaceOrientationPortrait;
}
- (void)willRotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration {
    [super willRotateToInterfaceOrientation:toInterfaceOrientation duration:duration];

}

- (void)didRotateFromInterfaceOrientation:(UIInterfaceOrientation)fromInterfaceOrientation
{
    [super didRotateFromInterfaceOrientation:fromInterfaceOrientation];
}

- (void)handleOrientationChangeNotification:(NSNotification *)notification
{
    
}
@end