iOS開(kāi)發(fā)設(shè)置指定頁(yè)面橫屏顯示屈暗，其余頁(yè)面豎屏顯示

假設(shè)跳轉(zhuǎn)邏輯為：從A頁(yè)面跳轉(zhuǎn)至B頁(yè)面，B頁(yè)面需要始終橫屏顯示脂男，其余頁(yè)面使用豎屏顯示养叛；

• 配置AppDelegate.m

  #import "BViewController.h"
  
  // 配置頁(yè)面方向
  - (UIInterfaceOrientationMask)application:(UIApplication *)application supportedInterfaceOrientationsForWindow:(UIWindow *)window {
      UIViewController *currentVC = [self getCurrentVC];
      if (currentVC && [currentVC isKindOfClass:[BViewController class]]) {
          return UIInterfaceOrientationMaskLandscapeRight;
      }
      return UIInterfaceOrientationMaskPortrait;
  }
  
  // 獲取當(dāng)前顯示的ViewController
  - (UIViewController *)getCurrentVC {
      UIViewController *rootVC = self.window.rootViewController;
      if (!rootVC || ![rootVC isKindOfClass:[UINavigationController class]]) {
          return nil;
      }
      UINavigationController *rootNav = (UINavigationController *)rootVC;
      UITabBarController *tab = (UITabBarController *)rootNav.topViewController;
      if (!tab || ![tab isKindOfClass:[UITabBarController class]]) {
          return nil;
      }
      UINavigationController *nav = tab.selectedViewController;
      if (!nav || ![nav isKindOfClass:[UINavigationController class]]) {
          return nil;
      }
      UIViewController *currentVC = nav.topViewController;
      return currentVC;
  }
  

  說(shuō)明： getCurrentVC方法用于獲取當(dāng)前顯示的ViewController, 我這里使用的導(dǎo)航結(jié)構(gòu)為：

  • UINavigationController
    • UITabBarController
      • UINavigationController

  這里需要根據(jù)具體的導(dǎo)航結(jié)構(gòu)修改getCurrentVC方法實(shí)現(xiàn)；

• 配置AViewController.m

  - (void)viewWillAppear:(BOOL)animated {
      [super viewWillAppear:animated];
      NSNumber *orientationTarget = [NSNumber numberWithInt:UIInterfaceOrientationPortrait];
      [[UIDevice currentDevice] setValue:orientationTarget forKey:@"orientation"];
  }
  
  // 重要：必須加此方法
  - (UIInterfaceOrientationMask)supportedInterfaceOrientations {
      return UIInterfaceOrientationMaskPortrait;
  }
  

  說(shuō)明： 如果不添加supportedInterfaceOrientations方法可能會(huì)導(dǎo)致從B頁(yè)面返回A頁(yè)面時(shí)A頁(yè)面橫屏顯示宰翅，需要旋轉(zhuǎn)下屏幕才會(huì)恢復(fù)一铅，此處期望的是返回A頁(yè)面時(shí)豎屏顯示；

• 配置BViewController.m

  - (void)viewWillAppear:(BOOL)animated {
      [super viewWillAppear:animated];
      NSNumber *orientationTarget = [NSNumber numberWithInt:UIInterfaceOrientationLandscapeRight];
      [[UIDevice currentDevice] setValue:orientationTarget forKey:@"orientation"];
  }
  

到這里就已經(jīng)配置完成了堕油，B頁(yè)面會(huì)始終橫屏顯示潘飘，其余頁(yè)面始終豎屏顯示；

• 調(diào)試中遇到的坑
  錯(cuò)誤配置： 勾選Device Orientation:
  
  在這里插入圖片描述

說(shuō)明： 這里是否勾選掉缺，對(duì)屏幕橫豎屏顯示沒(méi)有影響卜录，但是會(huì)影響啟動(dòng)頁(yè)顯示；如果這里勾選了橫屏顯示眶明，當(dāng)手機(jī)橫屏放置時(shí)啟動(dòng)App艰毒，啟動(dòng)頁(yè)會(huì)橫屏顯示；解決辦法就是取消此處的橫屏勾選搜囱。