iOS強(qiáng)制橫屏或強(qiáng)制豎屏

原文鏈接https://my.oschina.net/huqiji/blog/3031940第一種方法會出現(xiàn)無法轉(zhuǎn)屏的問題肥橙，我就沒有列出來镰绎，大家想看的話就去原文里自己去試吧为肮，我這邊用的是第二種初烘，親測有效口注，廢話不多說直接上代碼变擒。

第一種解決方案（不推薦，直接跳過看第二種解決方案）：

//強(qiáng)制轉(zhuǎn)屏

- (void)interfaceOrientation:(UIInterfaceOrientation)orientation{

if([[UIDevicecurrentDevice] respondsToSelector:@selector(setOrientation:)]) {??

? ? SEL selector? =NSSelectorFromString(@"setOrientation:");

NSInvocation*invocation = [NSInvocationinvocationWithMethodSignature:[UIDeviceinstanceMethodSignatureForSelector:selector]];??

?? [invocation setSelector:selector];? ?

? ? [invocation setTarget:[UIDevicecurrentDevice]];intval = orientation;// 從2開始是因?yàn)? 1 兩個(gè)參數(shù)已經(jīng)被selector和target占用

[invocation setArgument:&val atIndex:2];??

? ? [invocation invoke];?

? }}

強(qiáng)制橫屏：

[self interfaceOrientation:UIInterfaceOrientationLandscapeRight];

強(qiáng)制豎屏：

[self interfaceOrientation:UIInterfaceOrientationPortrait];

只在某一個(gè)界面提供轉(zhuǎn)屏的解決方法如下AppDelegate.m下操作

-(UIInterfaceOrientationMask)application:(UIApplication*)application supportedInterfaceOrientationsForWindow:(UIWindow*)window {

NSLog(@"0000000---------%@",NSStringFromClass([[selftopViewController]class]));

if([NSStringFromClass([[selftopViewController]class]) isEqualToString:@"想要提供轉(zhuǎn)屏的控制器的名字"])

{

//橫屏

returnUIInterfaceOrientationMaskLandscapeRight;? ?

}

//豎屏

returnUIInterfaceOrientationMaskPortrait;

}

/獲取界面最上層的控制器

- (UIViewController*)topViewController {

return[selftopViewControllerWithRootViewController:[UIApplicationsharedApplication].keyWindow.rootViewController];

}

//一層一層的進(jìn)行查找判斷

- (UIViewController*)topViewControllerWithRootViewController:(UIViewController*)rootViewController {

if([rootViewController isKindOfClass:[UITabBarControllerclass]]) {UITabBarController* tabBarController = (UITabBarController*)rootViewController;return[selftopViewControllerWithRootViewController:tabBarController.selectedViewController];? ?

}elseif([rootViewController isKindOfClass:[UINavigationControllerclass]]) {

UINavigationController* nav = (UINavigationController*)rootViewController;return[selftopViewControllerWithRootViewController:nav.visibleViewController];? ? }elseif(rootViewController.presentedViewController) {

UIViewController* presentedViewController = rootViewController.presentedViewController;

return[selftopViewControllerWithRootViewController:presentedViewController];?

? }else{

returnrootViewController;?

? }

}

如果你的應(yīng)用的根控制器是Nav就把下面這段代碼放到Nav根控制器下疆导，如果是TabVC放到TabVC的下面

- (BOOL)shouldAutorotate{returnYES;}- (UIInterfaceOrientationMask)supportedInterfaceOrientations{returnUIInterfaceOrientationMaskPortrait;}

然后在你想橫屏的控制器加上這段代碼赁项，基本上橫屏問題就可以搞定了，前提是你的這個(gè)控制器是moda出來的澈段，如果是push的話就要使用上文提到的強(qiáng)制橫豎屏的方法悠菜，下面這段代碼是不起作用的

- (BOOL) shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation {

return(toInterfaceOrientation ==UIInterfaceOrientationLandscapeRight);

}

- (UIInterfaceOrientationMask)supportedInterfaceOrientations {

returnUIInterfaceOrientationMaskLandscapeRight;

}

第二種解決方案：

靈活設(shè)置橫豎屏，不用區(qū)分Push還是Present,都是可以設(shè)置败富。

第一步：

在AppDelegate.h中添加旋轉(zhuǎn)屬性/**

* 是否允許轉(zhuǎn)向

*/@property(nonatomic,assign)BOOLallowRotation;

在AppDelegate.m中添加轉(zhuǎn)屏的代理方法

- (UIInterfaceOrientationMask)application:(UIApplication*)application supportedInterfaceOrientationsForWindow:(nullableUIWindow*)window{

if(self.allowRotation ==YES)

{

//橫屏

returnUIInterfaceOrientationMaskLandscape;? ? ? ? ? ?

}else{

//豎屏

returnUIInterfaceOrientationMaskPortrait;?

? ? ? ? ? }?

? }

第二步：

設(shè)置橫豎屏的核心方法悔醋，我是直接把這個(gè)方法添加到了UIDevice的分類中，代碼如下：

UIDevice+TFDevice.h :

#import<UIKit/UIKit.h>@interfaceUIDevice(TFDevice)/**

* @interfaceOrientation 輸入要強(qiáng)制轉(zhuǎn)屏的方向

*/+ (void)switchNewOrientation:(UIInterfaceOrientation)interfaceOrientation;@end

UIDevice+TFDevice.m :

#import"UIDevice+TFDevice.h"

@implementationUIDevice(TFDevice)

+ (void)switchNewOrientation:(UIInterfaceOrientation)interfaceOrientation{

NSNumber*resetOrientationTarget = [NSNumbernumberWithInt:UIInterfaceOrientationUnknown];? ? ? ? ? ? ? ? [[UIDevicecurrentDevice] setValue:resetOrientationTarget forKey:@"orientation"];NSNumber*orientationTarget = [NSNumbernumberWithInt:interfaceOrientation];? ? ? ? ? ?

? ? [[UIDevicecurrentDevice] setValue:orientationTarget forKey:@"orientation"];?

? }

@end

第三步：

在需要設(shè)置橫屏的控制器的ViewDidLoad中添加下面代碼：

- (void)viewDidLoad {?

? [superviewDidLoad];? ?

AppDelegate * appDelegate = (AppDelegate *)[UIApplicationsharedApplication].delegate;//允許轉(zhuǎn)成橫屏

appDelegate.allowRotation =YES;//調(diào)用橫屏代碼[UIDeviceswitchNewOrientation:UIInterfaceOrientationLandscapeRight];

}

第四步 (針對Push出的控制器來說)：

需要注意的是push過去的時(shí)候變成橫屏兽叮，pop出去的時(shí)候在設(shè)置豎屏芬骄，此時(shí)最好禁用系統(tǒng)的側(cè)滑返回手勢猾愿。

-(void)viewWillAppear:(BOOL)animated{?

? [superviewWillAppear:animated];//禁用側(cè)滑手勢方法self.navigationController.interactivePopGestureRecognizer.enabled =NO;

}

-(void)viewWillDisappear:(BOOL)animated{? ?

[superviewWillDisappear:animated];//禁用側(cè)滑手勢方法self.navigationController.interactivePopGestureRecognizer.enabled =YES;

}

第五步：

push控制器：

//點(diǎn)擊導(dǎo)航欄返回按鈕的時(shí)候調(diào)用，所以Push出的控制器最好禁用側(cè)滑手勢：

AppDelegate * appDelegate = (AppDelegate *)[UIApplicationsharedApplication].delegate;appDelegate.allowRotation =NO;//關(guān)閉橫屏僅允許豎屏//切換到豎屏[UIDeviceswitchNewOrientation:UIInterfaceOrientationPortrait];? [self.navigationController popViewControllerAnimated:YES];

present控制器：

AppDelegate * appDelegate = (AppDelegate *)[UIApplicationsharedApplication].delegate;appDelegate.allowRotation =NO;//關(guān)閉橫屏僅允許豎屏//切換到豎屏[UIDeviceswitchNewOrientation:UIInterfaceOrientationPortrait];? ? [selfdismissViewControllerAnimated:YEScompletion:nil];

第六步: 上圖