如果开关打开，如何强制所有屏幕的方向处于纵向模式？如果用户旋转它不应该改变它的方向

Question

这是一个超级class文件名Apporientationviewcontroller.h/m。我在所有其他子 class 中调用这个超级 class。所以如果“isPortraitModeONN”是“ON” 那么所有的屏幕都只能在纵向模式下工作。如果用户尝试将设备更改为横向，则不应旋转。如果开关是“ON”，它应该始终处于纵向模式。在我的情况下，当应用程序笑时它处于纵向模式。但如果我旋转屏幕，它就会变成横向。但在将设置中的开关关闭之前，它不应该改变方向..

  if(isPortraitModeONN)
   {
    [[UIDevice currentDevice] setOrientation:UIInterfaceOrientationPortrait];
   }
   else
   {
    if ([[UIDevice currentDevice] orientation] == UIDeviceOrientationLandscapeLeft){
        [[UIDevice currentDevice] setOrientation:UIInterfaceOrientationLandscapeRight];
    }
    else if([[UIDevice currentDevice] orientation] == UIDeviceOrientationLandscapeRight)
    {
        [[UIDevice currentDevice] setOrientation:UIInterfaceOrientationLandscapeLeft];
    }
    else{
        [[UIDevice currentDevice] setOrientation:UIInterfaceOrientationLandscapeRight];
    }
}

Answer 1

转到目标 -> 部署信息 -> 将设备方向设置为仅纵向

作为你的问题，如果你想通过点击按钮来做到这一点请试试这段代码，我不确定它是否适用于你的项目，但它适用于我的虚拟项目请试一试

[[UIDevice currentDevice] setValue:
                      [NSNumber numberWithInteger: UIInterfaceOrientationPortrait]
                            forKey:@"orientation"];

更改两个按钮的设备方向

Answer 2

你的代码应该是这样的，

AppDelegate.h

@property () BOOL restrictRotation;
-(UIInterfaceOrientationMask)application:(UIApplication *)application supportedInterfaceOrientationsForWindow:(UIWindow *)window;

AppDelegate.m

-(UIInterfaceOrientationMask)application:(UIApplication *)application supportedInterfaceOrientationsForWindow:(UIWindow *)window
{
   if(self.restrictRotation)
   return UIInterfaceOrientationMaskLandscape; //you can change upsidedown etc
else  
   return UIInterfaceOrientationMaskPortrait; // you can change landscape right or left only

 //this should be your initial app orientation because by default value of bool is false
}

SettingsViewController（您要从中更改整个应用的方向）

-(void) restrictRotation:(BOOL) restriction
{
   AppDelegate* appDelegate = (AppDelegate*)[UIApplication sharedApplication].delegate;
   appDelegate.restrictRotation = restriction;
   [appDelegate application:[UIApplication sharedApplication] supportedInterfaceOrientationsForWindow:self.view.window];
}

别忘了导入 appdelegate.h ;)

最后从你改变方向的开关，

[self restrictRotation:YES]; // or NO

您可以根据需要操作 supportedInterfaceOrientationsForWindow，就像您可以将属性设置为 int 而不是 bool，并且可以为不同的 int 值设置多个方向。

希望这会有所帮助:)

Answer 3

你可以这样做-

在 AppDelegate.h class 中添加 - @property () BOOL isPortraitModeONN;。

现在在 AppDelegate.m -

中编码

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {

     self.isPortraitModeONN=YES;

     return YES;
 }

-(UIInterfaceOrientationMask)application:(UIApplication *)application supportedInterfaceOrientationsForWindow:(UIWindow *)window
    {

        if(self.isPortraitModeONN)
            return UIInterfaceOrientationMaskPortrait;
        else
            return UIInterfaceOrientationMaskLandscape;

    }

现在添加 IBAction 共 UIButton 用于在 Apporientationviewcontroller.m--

中更改方向

- (IBAction)changeOrientation:(id)sender {

    if (allowedToRotate) {

        allowedToRotate=NO;

        AppDelegate* appDelegate = (AppDelegate*)[UIApplication sharedApplication].delegate;

        appDelegate.isPortraitModeONN = NO;

        NSNumber *value = [NSNumber numberWithInt:UIInterfaceOrientationLandscapeLeft];

        [[UIDevice currentDevice] setValue:value forKey:@"orientation"];

       }else{

        allowedToRotate=YES;

        AppDelegate* appDelegate = (AppDelegate*)[UIApplication sharedApplication].delegate;

        appDelegate.isPortraitModeONN = YES;

        NSNumber *value = [NSNumber numberWithInt:UIInterfaceOrientationPortrait];

        [[UIDevice currentDevice] setValue:value forKey:@"orientation"];

    }
   }

在Apporientationviewcontroller.m中定义BOOL allowedToRotate;默认值为YES；

Answer 4

这段代码对我有点用..

 -(void)viewWillTransitionToSize:(CGSize)size withTransitionCoordinator:   (id<UIViewControllerTransitionCoordinator>)coordinator
 {
///if isPortraitMode On then force the orientation to portrait if it's other than Portrait
///else force the orientation to landscape

if (isPortraitModeONN)
{
    [coordinator animateAlongsideTransition:^(id<UIViewControllerTransitionCoordinatorContext> context)
     {
         // do whatever
         UIInterfaceOrientation orientation = [[UIApplication sharedApplication] statusBarOrientation];
         if (UIInterfaceOrientationIsLandscape(orientation)) {
             ///App is rotating to landscape, force it to portrait
             NSNumber *value = [NSNumber numberWithInt:UIInterfaceOrientationPortrait];
             [[UIDevice currentDevice] setValue:value forKey:@"orientation"];
         }
     } completion:^(id<UIViewControllerTransitionCoordinatorContext> context)
     {

     }];
}
else{

    [coordinator animateAlongsideTransition:^(id<UIViewControllerTransitionCoordinatorContext> context)
     {
         // do whatever
         UIInterfaceOrientation orientation = [[UIApplication sharedApplication] statusBarOrientation];
         if (UIInterfaceOrientationIsPortrait(orientation)) {
             ///App is rotating to portrait, force it to landscape
             NSNumber *value = [NSNumber numberWithInt:UIInterfaceOrientationLandscapeRight];
             [[UIDevice currentDevice] setValue:value forKey:@"orientation"];
         }
     } completion:^(id<UIViewControllerTransitionCoordinatorContext> context)
     {
     }];
    }
[super viewWillTransitionToSize:size withTransitionCoordinator:coordinator];
 }

如果开关打开，如何强制所有屏幕的方向处于纵向模式？如果用户旋转它不应该改变它的方向

How to force orientation of all screen to be in portrait mode if switch is on ?? if user rotate it should not change its orientation

ios

objective-c

device-orientation