Iphone NavigationController未显示在UIViewController上以模式显示

有一个mainviewcontroller，上面有一个UIToolbar，其中有一个UIBarButtonim信息，它以模式显示UIViewcontroller

#import "ModalViewController.h"
#import <QuartzCore/QuartzCore.h>

@implementation ModalViewController

@synthesize textView;
@synthesize navBar;
@synthesize navigationController;
@synthesize delegate;

-(void)dealloc
{
  [textView release];
[navBar release];
[navigationController release];
[super dealloc];
 }

- (void) viewDidLoad
{
    [super viewDidLoad];

self.title = @"Info";

UINavigationController *navigationController = [[UINavigationController alloc]init];
                                                 //initWithRootViewController:viewController];

self.navigationController.navigationBar.tintColor = [UIColor brownColor];

self.navigationItem.leftBarButtonItem = [[[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemDone target:self action:@selector(Done:)] autorelease];

self.textView = [[[UITextView alloc] initWithFrame:CGRectMake(0, 0, 320, 416)]autorelease];

self.textView.textColor = [UIColor whiteColor];

self.textView.font = [UIFont fontWithName:@"Georgia-BoldItalic" size:14];

//self.textView.delegate = self;

self.textView.backgroundColor = [UIColor brownColor];

self.textView.layer.borderWidth = 1;

self.textView.layer.borderColor = [[UIColor whiteColor] CGColor];

self.textView.layer.cornerRadius = 1;

self.textView.textAlignment =  UITextAlignmentCenter;

self.textView.text = @"This is UITextView presenting modally.\nThis is UITextView presenting modally.\nThis is UITextView presenting modally.\nThis is UITextView presenting modally.\nThis is UITextView presenting modally.\nThis is UITextView presenting modally.

self.textView.editable = NO;

 //[self.view addSubview:navigationController.view];

[self.view addSubview: self.textView]; 

//[navigationController release];

现在，当按下Infobutton时，它会以模式显示UIViewController，其中包含UIExtView，但不会显示带有Done按钮的UINavigationController

我无法找出代码中缺少的内容

这就是我如何在UIViewController中显示UITextView和NavigationController的方式

#import "ModalViewController.h"
#import <QuartzCore/QuartzCore.h>

@implementation ModalViewController

@synthesize textView;
@synthesize navBar;
@synthesize navigationController;
@synthesize delegate;

-(void)dealloc
{
  [textView release];
[navBar release];
[navigationController release];
[super dealloc];
 }

- (void) viewDidLoad
{
    [super viewDidLoad];

self.title = @"Info";

UINavigationController *navigationController = [[UINavigationController alloc]init];
                                                 //initWithRootViewController:viewController];

self.navigationController.navigationBar.tintColor = [UIColor brownColor];

self.navigationItem.leftBarButtonItem = [[[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemDone target:self action:@selector(Done:)] autorelease];

self.textView = [[[UITextView alloc] initWithFrame:CGRectMake(0, 0, 320, 416)]autorelease];

self.textView.textColor = [UIColor whiteColor];

self.textView.font = [UIFont fontWithName:@"Georgia-BoldItalic" size:14];

//self.textView.delegate = self;

self.textView.backgroundColor = [UIColor brownColor];

self.textView.layer.borderWidth = 1;

self.textView.layer.borderColor = [[UIColor whiteColor] CGColor];

self.textView.layer.cornerRadius = 1;

self.textView.textAlignment =  UITextAlignmentCenter;

self.textView.text = @"This is UITextView presenting modally.\nThis is UITextView presenting modally.\nThis is UITextView presenting modally.\nThis is UITextView presenting modally.\nThis is UITextView presenting modally.\nThis is UITextView presenting modally.

self.textView.editable = NO;

 //[self.view addSubview:navigationController.view];

[self.view addSubview: self.textView]; 

//[navigationController release];

如果您能找出我在代码中做错了什么或遗漏了什么，我将不胜感激

非常感谢

@synthesize navigationController;

因此，

navigationController

是您的类成员变量

在函数中

- (void) viewDidLoad

您声明了一个局部变量

UINavigationController *navigationController

请注意，第二个

navigationController

与您的成员变量

navigationController

不同

因此，在

viewDidLoad

中，您需要创建成员变量

navigationController

的对象。不是本地变量

navigationController

不要在

viewDidLoad

中重新声明

navigationController

。而是使用成员变量创建对象，如：

navigationController = [[UINavigationController alloc]init];

---

这似乎是一种显示新控制器的不必要的复杂方式。在我的应用程序中，我是这样做的：

//此函数显示嵌套在导航控制器中的视图控制器（模式）

- (void) showModalController
{
    YourViewController * ecreator = [[YourViewController alloc] initWithNibName:@"YourViewController" bundle:nil];

    UINavigationController * navcontrol = [[UINavigationController alloc] initWithRootViewController: ecreator];

    [self presentModalViewController: navcontrol animated:YES];
    [navcontrol release];
    [ecreator release];
}

---

现在，您想在YourViewController的initWithNib和/或viewDidLoad功能中进行图形设置（导航栏颜色等）。

试试这个，它对我来说非常有用。我也有同样的问题

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
    if([segue.identifier isEqualToString:@“segue_name"])
    {
        UINavigationController *nav = [segue destinationViewController];
        ExampleViewController *exampleVC = (ExampleViewController *) nav.topViewController;

        //Setup any properties here and segue
    }
}

---

你能告诉我如何用代码在ViewEddLoad中创建成员变量的对象吗？我现在没有MAC。然而，它应该像我上面写的那样。不过，您可能需要使用不同的init方法。我正在以编程方式处理它。