ViewController已加载，但视图未显示

Question

我有一个视图，其控制器正在实例化（NSLog这样说），但视图没有显示。如果我将其加载为模态视图，则会显示，但如果我将其分配则不会。

我有这种结构（MenuView是没有出现的视图）：

// ViewController.h

#import "MenuViewController.h"
@class MenuViewController;
@interface ViewController : UIViewController<ASIHTTPRequestDelegate>{
    ...
    IBOutlet MenuViewController         *menuView;
}
...
@property(nonatomic, retain) MenuViewController *menuView;
@end

// ViewController.m

#import "MenuViewController.h"

@implementation ViewController

@synthesize menuView;

- (void)loadMenu{
  // THIS WORKS
  // [self presentModalViewController:menuView animated:YES];

  // THIS DOESN'T (VIEWCONTROLLER IS INSTANTIATED BUT VIEW DOESN'T APPEAR

  menuView = [[[MenuViewController alloc] initWithNibName:@"MenuView" bundle:Nil] autorelease];
  [self.navigationController pushViewController:menuView animated:YES];
}

Answer 1

一些想法：

在分配时尝试使用self.menuView：

self.menuView = [[MenuViewController alloc] initWithNibName:@"MenuView" bundle:Nil];

此外，可能不应该自动释放property。在dealloc中将其释放，并在nil中将其设置为viewDidUnload。

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确保self (ViewController)有navigationController。被ViewController

推出/提出navigationController

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是否从MainThread调用- (void)loadMenu{？查看[NSThread mainThread]

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查看一些教程/示例：

Adding a Navigation Controller by Hand

NavigationController Application in iPhone

Tutorial: Introducing UINavigationController Part 1

iPhone View Switching Tutorial

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