ios导航栏的后退按钮在弹出窗口中没有响应

Question

我维护基于xib文件的旧代码。 一切工作正常，但最近，弹出窗口中导航栏的后退按钮不再响应。 我从使用UIPopoverController更改为使用UIModalPresentationPopover样式呈现导航控制器，但没有任何更改。 下面是我在做什么：

navController = [[UINavigationController alloc] initWithRootViewController:instrusRootVC]; 
navController.modalPresentationStyle = UIModalPresentationPopover; 
navController.preferredContentSize = CGSizeMake(400.0, 600.0); 
navController.popoverPresentationController.sourceView = self.view; 
navController.popoverPresentationController.sourceRect = sender.frame; 
navController.popoverPresentationController.permittedArrowDirections = UIPopoverArrowDirectionUp; 
navController.popoverPresentationController.delegate = self; 

[self presentViewController:navController animated:YES completion:nil]; 

其中instrusRootVC是initWithNibName

在instrusRootVC

初始化表视图控制器，然后我打电话

[[self navigationController] pushViewController:secondVC animated:YES]; 

其中secondVC是一个新的表视图控制器初始化与initWithNibName

一切工作正常，除了导航栏的后退按钮不respo ND。

（如果我在secondVC叫

[[self navigationController] popViewControllerAnimated:YES]; 

的地方，它工作正常。）

我在做什么错？

完整的代码太长的意见去的，所以在这里它是：

UINavigationController *navController; 

if (APPTYPE == kTypeMultiInstruWithLevel) { 

    InstrusNamesVC *instrusRootVC = [[InstrusNamesVC alloc] 
      initWithTabInstruTypeNames: myPartitionInfos.partTabInstruNames 
       WithTabAllInstrusModel: myPartitionInfos.partTabInstrus 
      WithTabAllAnnPartByInstru: tabAnnotationsPartitionByInstru]; 
    navController = [[UINavigationController alloc] initWithRootViewController:instrusRootVC]; 

} else { 

    if ([myPartitionInfos.partTabInstrus count] > 1) 
    { 
     InstrusViewController *instrusRootVC = [[InstrusViewController alloc] initWithTabInstrusModel:myPartitionInfos.partTabInstrus WithTabAnnPartByInstru:tabAnnotationsPartitionByInstru]; 
     navController = [[UINavigationController alloc] initWithRootViewController:instrusRootVC]; 

    } 
    // We only have one instru, we skip the instru selection step 
    else 
    { 
     InstruPartitionVersionsVC *instrusRootVC = [[InstruPartitionVersionsVC alloc] initWithIndexInstru: 0 
       WithTabAnnPartByInstru: tabAnnotationsPartitionByInstru]; 

     navController = [[UINavigationController alloc] initWithRootViewController:instrusRootVC]; 
    } 
} 

navController.modalPresentationStyle = UIModalPresentationPopover; 
navController.preferredContentSize = CGSizeMake(400.0, 600.0); 
navController.popoverPresentationController.sourceView = self.view; 
navController.popoverPresentationController.sourceRect = sender.frame; 
navController.popoverPresentationController.permittedArrowDirections = UIPopoverArrowDirectionUp; 
navController.popoverPresentationController.delegate = self; 

navController.navigationBar.translucent = NO; 
navController.navigationBar.tintColor = SCROLL_COLOR_MMR; 
if(APPDESIGN== kDesignPinkPanther){ 
    navController.navigationBar.barTintColor = [UIColor colorWithRed:240/255.0 green:138/255.0 blue:177/255.0 alpha:1.0]; 
    navController.popoverPresentationController.backgroundColor = [UIColor colorWithRed:240/255.0 green:138/255.0 blue:177/255.0 alpha:1.0]; 
} else if (APPDESIGN== kDesignCarmen){ 
    navController.navigationBar.barTintColor = [UIColor colorWithRed:193/255.0 green:38/255.0 blue:67/255.0 alpha:1.0]; 
    navController.popoverPresentationController.backgroundColor = [UIColor colorWithRed:193/255.0 green:38/255.0 blue:67/255.0 alpha:1.0]; 
} else { 
    navController.navigationBar.barTintColor = BROWN_COLOR_MMR; 
    navController.popoverPresentationController.backgroundColor = BROWN_COLOR_MMR; 
} 

[self presentViewController:navController animated:YES completion:nil]; 

在instruViewController

例如代码如下：

- (id)initWithTabInstrusModel: (NSArray *)pTabInstru 
    WithTabAnnPartByInstru: (NSArray *)pTabAnn 
{ 
self = [super initWithNibName:@"InstrusViewController" bundle:[NSBundle mainBundle]]; 

if (self != nil) 
{ 
    tabInstrusModel = pTabInstru; 
    tabAnnPartByInstru = pTabAnn; 
} 

return self; 
} 

- (void)viewDidLoad 
{ 
[super viewDidLoad]; 

// init properties 
self.tabInstrusItems = [NSMutableArray array]; 

// Init tabInstruItems 
for (int i = 0; i < [tabInstrusModel count]; i++) 
{ 
    InstrumentPartitionModel *instruTMP = [tabInstrusModel objectAtIndex:i]; 
    [tabInstrusItems addObject:locStr(instruTMP.instruName)]; 
} 

// let selection done before 
self.clearsSelectionOnViewWillAppear = NO; 

// set background custom 
self.tableView.backgroundColor = [UIColor clearColor]; 
UIImage *backgroundImage = [UIImage imageNamed:@"bg_popup.png"]; 
UIImageView *backgroundImageView = [[UIImageView alloc]initWithImage:backgroundImage]; 
backgroundImageView.frame = self.tableView.frame; 
self.tableView.backgroundView = backgroundImageView; 

self.tableView.separatorColor = [UIColor clearColor]; 

self.tableView.rowHeight = 50.0; 

// Set navigation bar title 
UILabel *label = [[UILabel alloc] init]; 
[label formatAsTitlePopover:@""]; 
[self.navigationItem setTitleView:label]; 

然后我用 1试验）没有指定任何东西self.navigationItem.backBarButtonItem 2）使用此：

self.navigationItem.backBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"" style:UIBarButtonItemStylePlain target:self.navigationController action:@selector(popViewControllerAnimated:)]; 

使用该

3）：

self.navigationItem.backBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"" style:UIBarButtonItemStylePlain target:nil action:nil]; 

但这不会改变任何东西（除了当我不指定任何东西，返回按钮显示“回”）：按钮仍然无效。 我甚至试图把

self.navigationItem.backBarButtonItem.enabled = YES; 

没有任何成功。

然后didSelectRowAtIndexPath方法如下：

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath 
{ 
[(CustomUITableView *)tableView updateCellSelect : indexPath]; 

InstruPartitionVersionsVC *versionsVC = [[InstruPartitionVersionsVC alloc] 
     initWithIndexInstru: indexPath.row 
    WithTabAnnPartByInstru: tabAnnPartByInstru]; 

// In case of MultiInstruWithLevel, tabAnnPartByInstru only contains partitions for the selected instr type: 
if (APPTYPE == kTypeMultiInstruWithLevel) { 
    NSArray * tabAnnPartTMP = [tabAnnPartByInstru objectAtIndex:indexPath.row]; 
    AnnotationsPartitionModel *annPartTMP = [tabAnnPartTMP objectAtIndex:0]; 
    versionsVC.indexGlobal = annPartTMP.annPartInstruDisplay; 
} else { 
    versionsVC.indexGlobal = indexPath.row; 
} 

// Display new Controller 
[[self navigationController] pushViewController:versionsVC animated:YES]; 
} 

等了下一TableViewControllers ...

我检查了把堆栈上的所有表视图控制器具有相同的大小。现在

，我真的不知道我可以检查....

Answer 1

我还是不明白，为什么默认后退按钮突然停止响应，但我发现了一个周转使用左边栏按钮的工作原理好，我想分享它。

我所做的是增加在每个的viewController的viewDidLoad方法以下行旨在由呈现为酥料饼的导航控制器被推：

if (self != [self.navigationController.viewControllers objectAtIndex:0]) 
{ 
    self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] 
           initWithImage:[UIImage imageNamed:@"ico_back_popover.png"] 
             style:UIBarButtonItemStylePlain 
             target:self 
             action:@selector(leftBtnPressed:)]; 
} 

其中leftBtnPressed如下：

-(IBAction)leftBtnPressed:(id)sender 
{ 
    [self.navigationController popViewControllerAnimated:YES]; 
}