Question

我正在尝试这样做：在我家的应用程序中，如果我将设备置于横向模式，我将显示帮助视图。到目前为止它似乎工作正常，但如果我按下按钮去另一个视图，然后我回到家里并将设备置于风景中...我看到一切都是错误的。

以下是两张试图解释问题的图片：

这是我的ViewController.m代码：

#import "ViewController.h"

@implementation ViewController
@synthesize portraitView, landscapeView;

- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Release any cached data, images, etc that aren't in use.
}

#pragma mark - View lifecycle

- (void)viewDidLoad
{
[super viewDidLoad];
[[UIDevice currentDevice] beginGeneratingDeviceOrientationNotifications];
[[NSNotificationCenter defaultCenter] addObserver:self      
selector:@selector(orientationChanged:)name:@"UIDeviceOrientationDidChangeNotification"   
object:nil ];


// Do any additional setup after loading the view, typically from a nib.
}


-(void)orientationChanged:(NSNotification *)object{
UIDeviceOrientation deviceOrientation = [[object object] orientation];

    if (deviceOrientation == UIInterfaceOrientationPortrait )
{
    self.view = self.portraitView;        
}
else if (deviceOrientation == UIInterfaceOrientationLandscapeLeft || deviceOrientation ==    
UIInterfaceOrientationLandscapeRight)
{
    self.view = self.landscapeView;    
}
}

- (void)viewDidUnload
{
[super viewDidUnload];
// Release any retained subviews of the main view.
// e.g. self.myOutlet = nil;
}

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

- (void)viewDidAppear:(BOOL)animated
{
[super viewDidAppear:animated];
}

- (void)viewWillDisappear:(BOOL)animated
{
[super viewWillDisappear:animated];
}

- (void)viewDidDisappear:(BOOL)animated
{
[super viewDidDisappear:animated];
}


- (BOOL)shouldAutorotateToInterfaceOrientation:   
(UIInterfaceOrientation)interfaceOrientation
{
// Return YES for supported orientations
if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPhone) {
    return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown);
} else {
    return YES;
}  
}

@end

我希望你能帮助我

Answer 1

您可以在viewDidAppear中对当前方向进行额外检查，并相应地更改视图。您始终可以将设备的当前方向设为

[[UIDevice currentDevice] orientation];

编辑：尝试将此方法添加到您的课程中：

-(void)viewDidAppear{
UIDeviceOrientation deviceOrientation = [[UIDevice currentDevice] orientation];

 if (deviceOrientation == UIInterfaceOrientationPortrait )
 {
   self.view = self.portraitView;        
 }
 else if (deviceOrientation == UIInterfaceOrientationLandscapeLeft || deviceOrientation ==    
 UIInterfaceOrientationLandscapeRight)
 {
 self.view = self.landscapeView;    
 }
}

EDIT2 - 尝试手动将方向设置为：

- (void)viewDidAppear:(BOOL)animated
{
  [super viewDidAppear:animated];
  UIDeviceOrientation deviceOrientation = [[UIDevice currentDevice] orientation];

  [[UIDevice currentDevice] setOrientation:deviceOrientation];
  if (deviceOrientation == UIInterfaceOrientationPortrait )
   {
      self.view = self.portraitView;        
   }
  else if (deviceOrientation == UIInterfaceOrientationLandscapeLeft || deviceOrientation ==    
 UIInterfaceOrientationLandscapeRight)
   {
      self.view = self.landscapeView;    
   }
}

根据设备方向切换视图

1 个答案: