ios - 如何确定方向？

Question

我需要像 Youtube 全屏那样修复纵向或横向左方向。 当用户单击按钮时，它会更改为纵向或横向左。 并被修复。 用户只能通过按钮进行控制。

接受设备方向 纵向、横向 一般为左 这是我的代码

应用委托(delegate)

-(UIInterfaceOrientationMask)application:(UIApplication *)application supportedInterfaceOrientationsForWindow:(UIWindow *)window 
{
        if(restrictRotation)
            return UIInterfaceOrientationMaskPortrait;
        else
            return UIInterfaceOrientationMaskLandscapeLeft;
}

View Controller

-(void) restrictRotation:(BOOL) restriction
{
    AppDelegate* appDelegate = (AppDelegate*)[UIApplication sharedApplication].delegate;
    appDelegate->restrictRotation = restriction;
}

- (IBAction)rotateOrientationAction:(id)sender 
    {
        [self restrictRotation:NO];
        if(isPortrait){
            [[UIDevice currentDevice] setValue:@(UIInterfaceOrientationLandscapeLeft) forKey:@"orientation"];
            self.myNewScrollViewHeight.constant = self.view.frame.size.height - self.naviBar.frame.size.height - self.horizMenu.frame.size.height;
            self.portraitMenuView.hidden = YES;

        }else{

            [[UIDevice currentDevice] setValue:@(UIInterfaceOrientationPortrait) forKey:@"orientation"];
            self.myNewScrollViewHeight.constant = self.view.frame.size.height * 0.5;
            self.portraitMenuView.hidden = NO;
        }
        isPortrait = !isPortrait;
       [self restrictRotation:YES];
    }

如果我单击该按钮，它会更改为向左横向，但不会再次更改为纵向。

谢谢

Answer 1

您的条件不满足restrictRotation，请检查以下代码以获得所需结果。

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    isPortrait = YES;
}

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

- (IBAction)rotateOrientationAction:(id)sender
{
    if (isPortrait) {
        [self restrictRotation:NO];
        [[UIDevice currentDevice] setValue:@(UIInterfaceOrientationLandscapeLeft) forKey:@"orientation"];
    } else {
        [self restrictRotation:YES];
        [[UIDevice currentDevice] setValue:@(UIInterfaceOrientationPortrait) forKey:@"orientation"];
    }

    isPortrait = !isPortrait;
}

更新:

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    isPortrait = YES;
}


- (IBAction)rotateOrientationAction:(id)sender
{
    AppDelegate* appDelegate = (AppDelegate*)[UIApplication sharedApplication].delegate;
    appDelegate.restrictRotation = NO;
    [[UIDevice currentDevice] setValue:@(UIInterfaceOrientationPortrait) forKey:@"orientation"];

    if (isPortrait)
    {
        [[UIDevice currentDevice] setValue:@(UIInterfaceOrientationLandscapeLeft) forKey:@"orientation"];
    }
    else
    {
        [[UIDevice currentDevice] setValue:@(UIInterfaceOrientationPortrait) forKey:@"orientation"];
    }

    isPortrait = !isPortrait;
}