Safari会自动进入全局播放的情况
//禁止Safari自动全屏播放 webView.allowsInlineMediaPlayback = YES;
iOS 全局禁止横屏，但UIWebView 全屏播放视频，横屏，解决办法
UIWebview在播放网页视频的时候我们需要进行是否全屏状态的监听。
一般的需求是在播放视频时候需要横屏，退出全屏的时候不能横屏，但是UIWebview没有给出响应的方法
1，在APPDelegate.h文件中增加属性：是否支持横屏
/*** 是否允许横屏的标记 */
@property (nonatomic,assign)BOOL allowRotation;
在APPDelegate.m文件中增加方法，控制全部不支持横屏
-(NSUInteger)application:(UIApplication *)application supportedInterfaceOrientationsForWindow:(UIWindow *)window {
if (self.allowRotation) {
return UIInterfaceOrientationMaskAll;
}
return UIInterfaceOrientationMaskPortrait;
}
2，在需要实现webView横屏的界面上添加通知
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(begainFullScreen) name:UIWindowDidBecomeVisibleNotification object:nil];//进入全屏
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(endFullScreen) name:UIWindowDidBecomeHiddenNotification object:nil];//退出全屏
在退出全屏时，增加逻辑让其强制编程竖屏，这样当全屏播放的时候，点击down("完成")时，就会自动变成竖屏了。
// 进入全屏
-(void)begainFullScreen
{
AppDelegate *appDelegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];
appDelegate.allowRotation = YES;
}
// 退出全屏
-(void)endFullScreen
{
AppDelegate *appDelegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];
appDelegate.allowRotation = NO;
//强制归正：
if ([[UIDevice currentDevice] respondsToSelector:@selector(setOrientation:)]) {
SEL selector = NSSelectorFromString(@"setOrientation:");
NSInvocation *invocation = [NSInvocation invocationWithMethodSignature:[UIDevice instanceMethodSignatureForSelector:selector]];
[invocation setSelector:selector];
[invocation setTarget:[UIDevice currentDevice]];
int val =UIInterfaceOrientationPortrait;
[invocation setArgument:&val atIndex:2];
[invocation invoke];
}
}