iOS 代码强制横屏, pop,push后恢复竖屏

很多时候有强制横屏的需求. 首先要明确一个东西

Xnip2020-05-07_16-46-40.png

项目里面必须要勾选可以旋转的方向, 如果不勾选, 代码无效!

直接上代码,按照我的步骤来,包你实现功能
第一:

#import "AppDelegate.h"
在AppDelegate 添加下面的属性以及方法. 

/**
 * 是否允许转向
 */
@property(nonatomic,assign)BOOL allowRotation;
- (UIInterfaceOrientationMask)application:(UIApplication *)application supportedInterfaceOrientationsForWindow:(nullable UIWindow *)window

{
    
    if (self.allowRotation == YES) {
        //横屏
        return UIInterfaceOrientationMaskLandscape;
        
    }else{
        //竖屏
        return UIInterfaceOrientationMaskPortrait;
        
    }
    
}

第二: 添加分类
.h 文件

#import <UIKit/UIKit.h>

NS_ASSUME_NONNULL_BEGIN

@interface UIDevice (TFDevice)
/**
 * @interfaceOrientation 输入要强制转屏的方向
 */
+ (void)switchNewOrientation:(UIInterfaceOrientation)interfaceOrientation;
@end

NS_ASSUME_NONNULL_END

.m 文件

#import "UIDevice+TFDevice.h"

@implementation UIDevice (TFDevice)
+ (void)switchNewOrientation:(UIInterfaceOrientation)interfaceOrientation
{
        
        NSNumber *resetOrientationTarget = [NSNumber numberWithInt:UIInterfaceOrientationUnknown];
        
        [[UIDevice currentDevice] setValue:resetOrientationTarget forKey:@"orientation"];
        
        NSNumber *orientationTarget = [NSNumber numberWithInt:interfaceOrientation];
        
        [[UIDevice currentDevice] setValue:orientationTarget forKey:@"orientation"];
    
}
@end

第三:到需要旋转的控制器

-(void)viewWillAppear:(BOOL)animated
{
    [super viewWillAppear:animated];
    [self.navigationController.navigationBar setHidden:YES];
    //禁用侧滑手势方法
    self.navigationController.interactivePopGestureRecognizer.enabled = NO;
}
-(void)viewWillDisappear:(BOOL)animated
{
    [super viewWillDisappear:animated];
    [self.navigationController.navigationBar setHidden:NO];
    //开启侧滑手势方法
     self.navigationController.interactivePopGestureRecognizer.enabled = YES;
}

- (void)viewDidLoad {
    [super viewDidLoad];
//设置横屏
       AppDelegate * appDelegate = (AppDelegate *)[UIApplication sharedApplication].delegate;
       //允许转成横屏
       appDelegate.allowRotation = YES;
       //调用横屏代码
       [UIDevice switchNewOrientation:UIInterfaceOrientationLandscapeRight];
}
//如果 push 和 pop 之后需要强制竖屏
//push和 pop 代码前加上下面的代码
     //点击导航栏返回按钮的时候调用，所以Push出的控制器最好禁用侧滑手势：
    AppDelegate * appDelegate = (AppDelegate *)[UIApplication sharedApplication].delegate;
    appDelegate.allowRotation = NO;//关闭横屏仅允许竖屏
    //切换到竖屏
    [UIDevice switchNewOrientation:UIInterfaceOrientationPortrait];
    push,pop...代码