iphone - ViewController 已加载，但 View 未显示

Question

我有一个 View ，它的 Controller 正在被实例化(NSLog 是这么说的)，但是 View 没有显示出来。如果我将它加载为模态视图，它会出现，但如果我分配它则不会。

我有这样的结构(MenuView是没有出现的 View ):

//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:

分配时尝试使用 self.menuView:

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

另外，可能不应该自动释放一个属性。在dealloc中释放，在viewDidUnload中设置为nil。

---

确保 self (ViewController) 有一个 navigationController。 ViewController 是否由 navigationController 推送/呈现？

---

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

---

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

---