本项目只是个别页面需要横屏，所以不需要勾选方向，默认竖屏即可。
注意：
1、iOS16以下版本：只支持present跳转页面，并且是要设置scanVC.modalPresentationStyle = UIModalPresentationFullScreen;才会进入页面自动横屏生效
2、iOS16版本：push,present都可以（亲测iOS16.4）
1.创建单例（RotationManager）用于管理界面横竖屏状态
.h代码
//单例类
+(instancetype)shareInstance;
//是否横屏
@property(nonatomic,assign)BOOL isRotation;
//当前屏幕状态
+(UIInterfaceOrientationMask)supportedInterfaceOrientationsType;
.m代码
static RotationManager*_manager;
//单例方法
+(instancetype)shareInstance{
staticdispatch_once_t onceToken;
dispatch_once(&onceToken,^{
_manager=[[RotationManager alloc]init];
_manager.isRotation=NO;
});
return_manager;
}
//查询需要的屏幕状态
+(UIInterfaceOrientationMask)supportedInterfaceOrientationsType{
if(_manager.isRotation){
returnUIInterfaceOrientationMaskLandscape;
}
returnUIInterfaceOrientationMaskPortrait;
}
2.vc页调用
记得在哪页需要，就在哪页引入头文件 #import "RotationManager.h"
-(void)viewDidLoad{
[superviewDidLoad];
//开启横屏状态
[RotationManager shareInstance].isRotation=YES;
}
-(void)viewWillDisappear:(BOOL)animated{
[superviewWillDisappear:animated];
//一定要记得关闭横屏状态，不然退出界面后依旧是横屏
[RotationManager shareInstance].isRotation=NO;
}
-(BOOL)shouldAutorotate{
returnYES;
}
-(UIInterfaceOrientationMask)supportedInterfaceOrientations{
return UIInterfaceOrientationMaskLandscapeRight|UIInterfaceOrientationMaskLandscapeLeft;
}
-(UIInterfaceOrientation)preferredInterfaceOrientationForPresentation{
return UIInterfaceOrientationLandscapeRight;
}
3.AppDelegate
-(UIInterfaceOrientationMask)application:(UIApplication*)application supportedInterfaceOrientationsForWindow:(UIWindow*)window{
return [RotationManager supportedInterfaceOrientationsType];
}
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