Question

我创建了两个用于纵向模式的.xib文件，另一个用于横向模式，

在每次轮换时我想加载相应的.xib文件，

这是我的代码段，

ViewAppDelegate.m类

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];

    if ([UIApplication sharedApplication].statusBarOrientation==UIInterfaceOrientationPortrait | [UIApplication sharedApplication].statusBarOrientation==UIInterfaceOrientationPortraitUpsideDown)
    {
        self.viewController = [[OrientationViewController alloc] initWithNibName:@"PortraitController" bundle:nil];
        UINavigationController *navigationController=[[UINavigationController alloc] initWithRootViewController:self.viewController];
        self.window.rootViewController = navigationController;
    }
    else{
        self.viewController = [[OrientationViewController alloc] initWithNibName:@"LandscapeController" bundle:nil];
        UINavigationController *navigationController=[[UINavigationController alloc] initWithRootViewController:self.viewController];
        self.window.rootViewController = navigationController;
    }

    [self.window makeKeyAndVisible];
    return YES;
}

ViewController.m类

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

}

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation{
    return YES;
}


-(void)viewWillLayoutSubviews{

    if ([UIApplication sharedApplication].statusBarOrientation==UIInterfaceOrientationPortrait | [UIApplication sharedApplication].statusBarOrientation==UIInterfaceOrientationPortraitUpsideDown) 
    {
        [[NSBundle mainBundle] loadNibNamed:@"PortraitController" owner:self options:nil];
    }
    else{
        [[NSBundle mainBundle] loadNibNamed:@"LandscapeController" owner:self options:nil];
    }

}

写完这么多代码后，我的应用程序什么都没显示......它只显示黑屏。

请提出一些解决方法。

Answer 1

一旦尝试这样

[[UIDevice currentDevice] beginGeneratingDeviceOrientationNotifications];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(changeOrientation) name:UIDeviceOrientationDidChangeNotification object:nil];

将此方法添加到应用视图控制器中以获取通知。

-(void)changeOrientation {
    UIDeviceOrientation orientation = [UIDevice currentDevice].orientation;
    if (orientation == UIDeviceOrientationPortrait || orientation == UIDeviceOrientationPortraitUpsideDown) {
        [[NSBundle mainBundle] loadNibNamed:@"Portrait" owner:self options:nil];
    }
    else {
        [[NSBundle mainBundle] loadNibNamed:@"Landscape" owner:self options:nil];
    }

}

Answer 2

您可以在viewController.m中使用willRotateToInterfaceOrientation来实现此目标

-(void)willRotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation  duration:(NSTimeInterval)duration
{
    if( UIInterfaceOrientationIsLandscape(toInterfaceOrientation) )
    {
        [[NSBundle mainBundle] loadNibNamed: [NSString stringWithFormat:@"%@-landscape", NSStringFromClass([self class])]
                                      owner: self
                                    options: nil];
        [self viewDidLoad];
    }
    else
    {
        [[NSBundle mainBundle] loadNibNamed: [NSString stringWithFormat:@"%@", NSStringFromClass([self class])]
                                      owner: self
                                    options: nil];
        [self viewDidLoad];
    }
}

您可以检查viewwillAppear方法的方向，如下所示，并分别加载xib：

-(void)viewWillAppear:(BOOL)animated{
    [super viewWillAppear:YES];

    if (UIInterfaceOrientationIsPortrait(self.interfaceOrientation)){
        [[NSBundle mainBundle] loadNibNamed: [NSString stringWithFormat:@"%@", NSStringFromClass([self class])]
                                      owner: self
                                    options: nil];
        [self viewDidLoad];
    }
    else
    {
        [[NSBundle mainBundle] loadNibNamed: [NSString stringWithFormat:@"%@-landscape", NSStringFromClass([self class])]
                                      owner: self
                                    options: nil];
        [self viewDidLoad];
    }
}

在这里，我有像xibs这样的名字
人像：viewControllerName
横向：viewControllerName-landscape

我再次调用viewDidload方法再次加载新的xib。

实现这一目标的另一种方法是： GPOrientationKit
这也是一个很好的!!

或者，

您可以通过创建2个xib来创建旋转控件的更改框架，所有控件具有相同的标记名称，并使一个LayoutManager class映射标记并获取帧并分配相应的横向/纵向帧（通过从中获取） xibs）。

Answer 3

-(void)setFramesForPotrait
{

// set frames here

}

-(void)setFramesForLandscaeMode
{

// set frames here

}

-(bool)shouldAutorotate.....
{
return Yes
}

-()willAutoRotate......
{
if(orientation = uiinterfaceOrientationPotrait)
{
[self setFramesForPotrait];
}
else
{
[self setFramesForLandscape];
}

为什么不在单视图控制器中为横向和纵向设置框架

在iOS中的Orientation上加载不同的xib文件

3 个答案: