模拟器中的黑屏问题

Question

我正在为 iPad 开发一款游戏，我让它以菜单屏幕启动。有一段时间，菜单屏幕在模拟器中显示得很好。我在启动基于视图的应用程序时使用 xcode 提供的主视图控制器。但是，不幸的是，我不小心切断了界面生成器中 UIView 和视图控制器之间的连接，重新连接后，屏幕现在显示为空白。当我在界面生成器中模拟屏幕时它工作得很好，但在 xcode 中运行时却不行。这是视图控制器的代码：

//
//  FunctionMachineViewController.h
//  FunctionMachine
//
//  Created by Kameron Schadt on 5/24/11.
//  Copyright 2011 Willamette University. All rights reserved.
//

#import <UIKit/UIKit.h>

@interface FunctionMachineViewController : UIViewController {

IBOutlet UITextField* equation;
IBOutlet UISlider* startLevel;
IBOutlet UITextView* startLevelNumber;

}

- (IBAction) startOnePlayer:(id)sender;
- (IBAction) startTwoPlayer:(id)sender startingEquation:(NSString*)equationUsed;
- (IBAction) sliderValueChanged:(UISlider*)sender;

@property(nonatomic, retain) IBOutlet UISlider* startLevel;
@property(nonatomic, retain) IBOutlet UITextField* equation;
@property(nonatomic, retain) IBOutlet UITextView* startLevelNumber;

@end


//
//  FunctionMachineViewController.m
//  FunctionMachine
//
//  Created by Kameron Schadt on 5/24/11.
//  Copyright 2011 Willamette University. All rights reserved.
//

#import "FunctionMachineViewController.h"
#import "GameViewController.h"

@implementation FunctionMachineViewController

@synthesize equation, startLevel, startLevelNumber;

- (IBAction)sliderValueChanged:(UISlider*)sender {
[startLevelNumber setText:[NSString stringWithFormat:@" %.1f", [sender value]]];
}

-(IBAction)startOnePlayer:(id)sender
{
GameViewController* GameView = [[GameViewController alloc] initWithNibName:nil bundle:nil];
[GameView isOnePlayer:YES];
[self presentModalViewController:GameView animated:YES];
}

-(IBAction)startTwoPlayer:(id)sender startingEquation:(NSString*)equationUsed
{
GameViewController* GameView = [[GameViewController alloc] initWithNibName:nil bundle:nil];
[GameView isOnePlayer:NO];
[self presentModalViewController:GameView animated:YES];
}

- (void)viewDidLoad {
[super viewDidLoad];
}


// Override to allow orientations other than the default portrait orientation.
- (BOOL)shouldAutorotateToInterfaceOrientation:    (UIInterfaceOrientation)interfaceOrientation {
return YES;
}

- (void)didReceiveMemoryWarning {
// Releases the view if it doesn't have a superview.
[super didReceiveMemoryWarning];

// Release any cached data, images, etc that aren't in use.
}

- (void)viewDidUnload {
// Release any retained subviews of the main view.
// e.g. self.myOutlet = nil;
}


- (void)dealloc {
[super dealloc];
}

@end

我在这里没有真正看到任何问题，所以我假设它与我将视图控制器重新连接到视图有关。我没有正在使用的实际视图文件，只有视图控制器。有人可以帮忙吗？

Answer 1

检查“Supporting Files”文件夹中 [YourApp]-info.plist 中“Main nib file base name”的设置 - 如果您更改了根视图控制器的名称，则可能需要将此处的名称更改为出色地。

Answer 2

由于某些奇怪的原因，我的应用程序委托的引用插座已断开连接。

尝试使用应用程序委托的连接检查器（最右侧菜单）创建从委托到文件所有者的引用出口。