SplitViewController錯誤？

Question

我設置了一個非常簡單的iOS splitView控制器項目，它有一個非常奇怪的錯誤。如果以橫向模式啓動應用程序，請點擊按鈕以打開另一個視圖，旋轉到縱向，然後返回到開始視圖 - 左側的表格菜單不應該是可見的，但它是..奇怪的是，您不能與它互動，這導致我相信它不是真的存在，而是某種神器。

請注意，這隻會在您第一次使用它時發生，然後再也不會發生，直到您在橫向啓動應用程序爲止。

MasterViewController：

#import "MasterViewController.h" 

#import "DetailViewController.h" 


@interface MasterViewController() { 
    NSMutableArray *_objects; 
} 

@property (nonatomic, strong)UITableView *menu; 

@end 

@implementation MasterViewController 

- (void)awakeFromNib 
{ 
    self.clearsSelectionOnViewWillAppear = NO; 
    self.contentSizeForViewInPopover = CGSizeMake(320.0, 600.0); 
    [super awakeFromNib]; 
} 

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

    UIBarButtonItem *addButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAdd target:self action:@selector(insertNewObject:)]; 
    self.navigationItem.rightBarButtonItem = addButton; 
    self.detailViewController = (DetailViewController *)[[self.splitViewController.viewControllers lastObject] topViewController]; 

} 


- (void)didReceiveMemoryWarning 
{ 
    [super didReceiveMemoryWarning]; 
    // Dispose of any resources that can be recreated. 
} 

- (void)insertNewObject:(id)sender 
{ 
    if (!_objects) { 
     _objects = [[NSMutableArray alloc] init]; 
    } 
    [_objects insertObject:[NSDate date] atIndex:0]; 
    NSIndexPath *indexPath = [NSIndexPath indexPathForRow:0 inSection:0]; 
    [self.tableView insertRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationAutomatic]; 
} 

#pragma mark - Table View 

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView 
{ 
    return 1; 
} 

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section 
{ 
    return _objects.count; 
} 

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath 
{ 
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"Cell" forIndexPath:indexPath]; 

    NSDate *object = _objects[indexPath.row]; 
    cell.textLabel.text = [object description]; 
    return cell; 
} 

- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath 
{ 
    // Return NO if you do not want the specified item to be editable. 
    return YES; 
} 

- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath 
{ 
    if (editingStyle == UITableViewCellEditingStyleDelete) { 
     [_objects removeObjectAtIndex:indexPath.row]; 
     [tableView deleteRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationFade]; 
    } else if (editingStyle == UITableViewCellEditingStyleInsert) { 
     // Create a new instance of the appropriate class, insert it into the array, and add a new row to the table view. 
    } 
} 

/* 
// Override to support rearranging the table view. 
- (void)tableView:(UITableView *)tableView moveRowAtIndexPath:(NSIndexPath *)fromIndexPath toIndexPath:(NSIndexPath *)toIndexPath 
{ 
} 
*/ 

/* 
// Override to support conditional rearranging of the table view. 
- (BOOL)tableView:(UITableView *)tableView canMoveRowAtIndexPath:(NSIndexPath *)indexPath 
{ 
    // Return NO if you do not want the item to be re-orderable. 
    return YES; 
} 
*/ 

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath 
{ 
    NSDate *object = _objects[indexPath.row]; 
    self.detailViewController.detailItem = object; 
} 

@end 

DetailViewController：

#import "DetailViewController.h" 
#import "StandardViewViewController.h" 


@interface DetailViewController() 
@property (strong, nonatomic) UIPopoverController *masterPopoverController; 

-(IBAction)buttonTapped:(id)sender; 

- (void)configureView; 
@end 

@implementation DetailViewController 

#pragma mark - Managing the detail item 

- (void)setDetailItem:(id)newDetailItem 
{ 
    if (_detailItem != newDetailItem) { 
     _detailItem = newDetailItem; 

     // Update the view. 
     [self configureView]; 
    } 

    if (self.masterPopoverController != nil) { 
     [self.masterPopoverController dismissPopoverAnimated:YES]; 
    }   
} 

- (void)configureView 
{ 
    // Update the user interface for the detail item. 

    if (self.detailItem) { 
     self.detailDescriptionLabel.text = [self.detailItem description]; 
    } 
} 

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

    [self configureView]; 
} 

- (void)didReceiveMemoryWarning 
{ 
    [super didReceiveMemoryWarning]; 
    // Dispose of any resources that can be recreated. 
} 

#pragma mark - Split view 

- (void)splitViewController:(UISplitViewController *)splitController willHideViewController:(UIViewController *)viewController withBarButtonItem:(UIBarButtonItem *)barButtonItem forPopoverController:(UIPopoverController *)popoverController 
{ 
    barButtonItem.title = NSLocalizedString(@"Master", @"Master"); 
    [self.navigationItem setLeftBarButtonItem:barButtonItem animated:YES]; 
    self.masterPopoverController = popoverController; 
} 

- (void)splitViewController:(UISplitViewController *)splitController willShowViewController:(UIViewController *)viewController invalidatingBarButtonItem:(UIBarButtonItem *)barButtonItem 
{ 
    // Called when the view is shown again in the split view, invalidating the button and popover controller. 
    [self.navigationItem setLeftBarButtonItem:nil animated:YES]; 
    self.masterPopoverController = nil; 
} 

-(IBAction)buttonTapped:(id)sender 
{ 
    StandardViewViewController *sv = [[StandardViewViewController alloc]initWithNibName:@"StandardViewViewController" bundle:nil]; 
    [self.splitViewController presentViewController:sv animated:YES completion:nil]; 

} 

@end 

這是一個已知的bug？有沒有解決方案？

Answer 1

雖然不夠漂亮，但解決方案建議使用here。 這是你將如何實施解決方案：

-(IBAction)buttonTapped:(id)sender 
{ 
    StandardViewViewController *sv = [[StandardViewViewController alloc] initWithNibName:nil bundle:nil]; 
    sv.modalPresentationStyle = UIModalPresentationPageSheet; // <-- Add this 
    [self.splitViewController presentViewController:sv animated:YES completion:nil]; 
} 

在StandardViewController.m補充一點：

-(void)viewWillLayoutSubviews { 
    self.view.bounds = [StandardViewViewController screenBoundsForCurrentOrientation]; 
    [super viewWillLayoutSubviews]; 
} 

+(CGRect)screenBoundsForCurrentOrientation { 
    return [self screenBoundsForOrientation:[UIApplication sharedApplication].statusBarOrientation]; 
} 

+(CGRect)screenBoundsForOrientation:(UIInterfaceOrientation)orientation { 

    UIScreen *screen = [UIScreen mainScreen]; 
    CGRect fullScreenRect = screen.bounds; //implicitly in Portrait orientation. 

    if(orientation == UIInterfaceOrientationLandscapeRight || orientation == UIInterfaceOrientationLandscapeLeft){ 
     CGRect temp = CGRectZero; 
     temp.size.width = fullScreenRect.size.height; 
     temp.size.height = fullScreenRect.size.width; 
     fullScreenRect = temp; 
    } 

    return fullScreenRect; 
} 

爲了使它更漂亮，你可以把對StandardViewController代碼到一個新的類，它的StandardViewController可以擴展。

而且，是的，這看起來像一個錯誤。