iOS 屏幕横竖屏转换的方法

首先选择支持的旋转方向（两种方法，推荐第二种）

(1)修改Info.plist文件，见图1

(2)直接上图，（勾选即可）

2.在AppDelegate中添加属性方法

在.h中添加一个属性allowRotation

@interfaceAppDelegate: UIResponder@property(strong, nonatomic) UIWindow *window;@property(nonatomic,assign)BOOL allowRotation;//是否允许转向@end

.m中添加下面的方法

- (UIInterfaceOrientationMask)application:(UIApplication*)application supportedInterfaceOrientationsForWindow:(nullableUIWindow*)window{if(_allowRotation ==YES) {returnUIInterfaceOrientationMaskLandscapeRight;    }else{return(UIInterfaceOrientationMaskPortrait);    }}

3.在你需要旋转的控制器.m中添加一下方法

- (void)setNewOrientation:(BOOL)fullscreen{if(fullscreen) {NSNumber*resetOrientationTarget = [NSNumbernumberWithInt:UIInterfaceOrientationUnknown];        [[UIDevicecurrentDevice] setValue:resetOrientationTarget forKey:@"orientation"];NSNumber*orientationTarget = [NSNumbernumberWithInt:UIInterfaceOrientationLandscapeRight];        [[UIDevicecurrentDevice] setValue:orientationTarget forKey:@"orientation"];    }else{NSNumber*resetOrientationTarget = [NSNumbernumberWithInt:UIInterfaceOrientationUnknown];        [[UIDevicecurrentDevice] setValue:resetOrientationTarget forKey:@"orientation"];NSNumber*orientationTarget = [NSNumbernumberWithInt:UIInterfaceOrientationPortrait];        [[UIDevicecurrentDevice] setValue:orientationTarget forKey:@"orientation"];    }}

4.点击旋转按钮调用- (void)setNewOrientation:(BOOL)fullscreen方法

//横竖屏切换按钮方法-(void)screen{//记着#import "AppDelegate.h"AppDelegate * appDelegate = (AppDelegate *)[UIApplicationsharedApplication].delegate;if(_fullScreen ) {//横屏情况下，点击此按钮变为竖屏appDelegate.allowRotation =NO;//设置竖屏[selfsetNewOrientation:NO];//调用转屏代码self.navigationController.navigationBar.hidden =NO;//navbar消失[selfsetViewFrame:NO];//竖屏布局}else{//竖屏情况下，点击此按钮变为横屏appDelegate.allowRotation =YES;////设置横屏[selfsetNewOrientation:YES];////调用转屏代码self.navigationController.navigationBar.hidden =YES;//navbar出现[selfsetViewFrame:YES];//横屏布局}}

3.获取当前屏幕是竖屏还是横屏

#import"AppDelegate.h"

@interfaceJGCameraViewController()

@property(nonatomic,assign)UIInterfaceOrientationinterfaceOrientation;

@end

- (void)viewWillAppear:(BOOL)animated {

[superviewWillAppear:animated];//改变AppDelegate的appdelegete.allowRotation属性AppDelegate*appdelegete = (AppDelegate*)[UIApplicationsharedApplication].delegate;appdelegete.allowRotation=YES;self.interfaceOrientation=1;

}

- (void)willAnimateRotationToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation duration:(NSTimeInterval)duration {

self.interfaceOrientation= interfaceOrientation;switch(interfaceOrientation) {caseUIInterfaceOrientationPortrait://home健在下break;

caseUIInterfaceOrientationPortraitUpsideDown:

//home健在上

break;

caseUIInterfaceOrientationLandscapeLeft:

//home健在左

break;

caseUIInterfaceOrientationLandscapeRight://home健在右

break;

default:

break;

}

}