在 MainWindow.xib 中加载视图 .xib

Question

这可能是一个非常愚蠢的错误，但我已经花了 4 多天的时间寻找解决方案。

这很简单，我有我的 MainView.xib 和一个名为 FirstViewController (h/m/xib) 的视图。

在 MainWindow.xib 中，我添加了一个 UIViewController 并将类名更改为 FirstViewController 并设置了 Nib 名称（尽管我尝试了两种方式）。

我想这与插座有关，但我不能说清楚，因为我是一个为 iOS 开发的新手，任何帮助都会有很大帮助。

我使用 XCode 3.2 和界面生成器，以及 SDK 4.3

AppDelegate

#import <UIKit/UIKit.h>
#import <CoreLocation/CoreLocation.h>


@interface iPadTerritorioV2AppDelegate : NSObject <UIApplicationDelegate> {

    IBOutlet UIWindow *window;
    IBOutlet UIViewController *navigationController;

    NSString *devToken;

    NSString *matricula;
    NSString *campus;

        NSMutableArray *materiasAlumno; //para CCM
        NSMutableArray *busqDir; //para CCM

    NSInteger agendaBadgeNumber;
    NSInteger intramurosBadgeNumber;
    NSInteger notificacionesBadgeNumber;
    NSInteger mapaBadgeNumber;

    NSMutableData *receivedData;
    NSMutableDictionary *listData;

    BOOL yaSeHizoElPrimerFetchBadges;

}

@property (nonatomic, retain) IBOutlet UIWindow *window;
@property (nonatomic, retain) IBOutlet UIViewController *navigationController;


@property (nonatomic, retain) NSString *devToken;

@property (nonatomic, retain) NSString *matricula;
@property (nonatomic, retain) NSString *campus;

@property (nonatomic, retain) NSMutableArray *materiasAlumno;
@property (nonatomic, retain) NSMutableArray *busqDir;

@property NSInteger agendaBadgeNumber;
@property NSInteger intramurosBadgeNumber;
@property NSInteger notificacionesBadgeNumber;
@property NSInteger mapaBadgeNumber;

@property (nonatomic, retain) NSMutableData *receivedData;
@property (nonatomic, retain) NSMutableDictionary *listData;


@property BOOL yaSeHizoElPrimerFetchBadges;

- (void)fetchBadges;

@end

FirstViewController.h

#import <UIKit/UIKit.h>
#import "Constants.h"
#import "StringDecoding.h"

#define kConnectionBadgeNotifications   0
#define kConnectionLogin                1
#define kConnectionDevToken             2

#define kCCMindex   0
#define kCSFindex   1
#define kMTYindex   2

@interface FirstViewController : UIViewController {

    IBOutlet UISegmentedControl *segmentedCampus;
    IBOutlet UITextField *usernameField;
    IBOutlet UITextField *passwordField;
    IBOutlet UISwitch *remembermeSwitch;
    IBOutlet UIButton *loginButton;
    UIActivityIndicatorView *loginIndicator;

    NSMutableDictionary *listData;
    NSMutableData *receivedData;
    NSInteger connectionID;
}

@property (nonatomic, retain) UISegmentedControl *segmentedCampus;
@property (nonatomic, retain) UITextField *usernameField;
@property (nonatomic, retain) UITextField *passwordField;
@property (nonatomic, retain) UIActivityIndicatorView *loginIndicator;
@property (nonatomic, retain) UISwitch *remembermeSwitch;
@property (nonatomic, retain) UIButton *loginButton;

@property (nonatomic, retain) NSMutableDictionary *listData;
@property (nonatomic, retain) NSMutableData *receivedData;
@property NSInteger connectionID;

- (IBAction)handleNextClick:(id) sender;
- (IBAction)backgroundClick;
- (IBAction)login: (id) sender;

@end

Answer 1

听起来您的 FirstViewController 没有被保留 - 如果它没有分配到任何地方的插座，则没有任何东西保留它，它就会消失。在某处添加一个属性（也许是您的 AppDelegate，如果这就是您所拥有的）并将其连接到控制器：

@property (nonatomic, retain) IBOutlet UIViewController *firstViewController;