前言
在开发中有时会碰到旋转屏幕的需求，例如直播时横竖屏推流，这里我使用的一种方法时用纯代码强制翻转，其他晚上方法也都使用过，但是效果并不好，目前这个方法还可以。
步骤
- 1.AppDelegate中配置
//AppDelegate.h
#import <UIKit/UIKit.h>
@interface AppDelegate : UIResponder <UIApplicationDelegate>
//允许横屏
@property (nonatomic, assign) BOOL allowLandscapeRight;
@end
//AppDelegate.m 增加此方法
//横竖屏切换使用
- (UIInterfaceOrientationMask)application:(UIApplication *)application supportedInterfaceOrientationsForWindow:(UIWindow *)window
{
if (self.allowLandscapeRight) {
return UIInterfaceOrientationMaskLandscapeRight;
}
return UIInterfaceOrientationMaskPortrait;
}
- 2.在要跳转的界面
AppDelegate *appDelegate = (AppDelegate *)[UIApplication sharedApplication].delegate;
appDelegate.allowLandscapeRight = YES;
//强制旋转成全屏
NSNumber *value = [NSNumber numberWithInt:UIDeviceOrientationLandscapeLeft];
[[UIDevice currentDevice]setValue:value forKey:@"orientation"];
[UIViewController attemptRotationToDeviceOrientation];
[self.navigationController pushViewController:[[YouVC alloc] init] animated:YES];
- 3.在退出的时候
- (void)viewWillDisappear:(BOOL)animated{
[super viewWillDisappear:animated];
AppDelegate *appDelegate = (AppDelegate *)[UIApplication sharedApplication].delegate;
appDelegate.allowLandscapeRight = NO;
//强制旋转成竖屏
NSNumber *value = [NSNumber numberWithInt:UIDeviceOrientationPortrait];
[[UIDevice currentDevice]setValue:value forKey:@"orientation"];
[UIViewController attemptRotationToDeviceOrientation];
}
问题
可能会碰到状态栏不显示的问题，详见我的上一篇文章 iOS 状态栏更改颜色、适配等
