Iphone 将视图控制器推到导航堆栈上会导致SIGABRT

作为前言，我对iOS开发还不熟悉。我已经四处寻找了一段时间，试图找到一个答案，无论是在这里还是通过谷歌

我的应用程序加载到带有注释的mapview中。如果用户点击其中一个注释，将显示带有附件按钮的详图索引视图。我遇到的问题是当点击附件按钮时调用的方法。我想显示特定注释的详细视图，但当我点击附件按钮时，应用程序会与SIGABRT崩溃

// method that provides the view for when the callout accessory button is tapped
-               (void)mapView:(MKMapView *)mapView 
               annotationView:(MKAnnotationView *)view 
calloutAccessoryControlTapped:(UIControl *)control
{
    // grabs the annotation's title from the annotation view
    NSString *viewTitle = view.annotation.title;

    // grabs corresponding POI object for map annotation
    PointOfInterest *object = [[PointOfInterest alloc] init];
    object = [dictionary objectForKey:(NSString *)viewTitle];

    // assigns title and subtitle ivars to variables to be passed into detailviewcontroller init
    NSString *title = object._title;
    NSString *subtitle = object._subtitle;
    UIImage *picture = object._picture;
    NSString *description = object._description;

    // releases POI object after all the information has been taken from it
    [object release];

    // inits detailVC
    DetailVC *detailVC = [[DetailVC alloc] initWithNibName:@"DetailVC" 
                                                    bundle:[NSBundle mainBundle]];

    // sets the nsstring ivars in the DVC which correspond to the POI information
    detailVC.thetitleText = title;
    detailVC.thesubtitleText = subtitle;
    detailVC.thepictureImage = picture;
    detailVC.thedescriptionText = description;

    // sets the "back" button on the navigation controller to say "Back to Map"
    UIBarButtonItem *newBackButton = [[UIBarButtonItem alloc] initWithTitle:@"Back to Map" 
                                                                      style:UIBarButtonItemStyleBordered 
                                                                     target:nil 
                                                                     action: nil];
    [[self navigationItem] setBackBarButtonItem: newBackButton];
    [newBackButton release];

    // pushes navcontroller onto the stack and releases the detail viewcontroller
    [self.navigationController pushViewController:detailVC animated:YES];
    [detailVC release];
}

我还没有添加图片和描述，因为我只是想用标题和副标题显示视图

下面是DetailViewController类代码 标题：

@interface DetailViewController : UIViewController {
    IBOutlet UIScrollView *scrollview;
    IBOutlet UILabel *thetitle;
    NSString *thetitleText;
    IBOutlet UILabel *thesubtitle;
    IBOutlet UIImage *thepicture;
    IBOutlet UITextView *thedescription;
}

@property (nonatomic, retain) UIScrollView *scrollview;
@property (nonatomic, retain) UILabel *thetitle;
@property (nonatomic, retain) NSString *thetitleText;
@property (nonatomic, retain) UILabel *thesubtitle;
@property (nonatomic, retain) UIImage *thepicture;
@property (nonatomic, retain) UITextView *thedescription;

// method that creates the custom detail view with the corresponding information from
// the point of interest objects
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil title:(NSString*)title subtitle:(NSString *)subtitle picture:(UIImage *)picture description:(NSString *)description;

@end

@implementation DetailViewController

@synthesize scrollview, thetitle, thesubtitle, thepicture, thedescription, thetitleText;


- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil title:(NSString *)title subtitle:(NSString *)subtitle picture:(UIImage *)picture description:(NSString *)description;
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        // Custom initialization
        NSLog(@"view initialized");
}
return self;
}

- (void)dealloc
{
    [scrollview release];
    [thetitle release];
    [thesubtitle release];
    [thepicture release];
    [thedescription release];
    [thetitleText release];
    [super dealloc];
}

- (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.
}

#pragma mark - View lifecycle

- (void)viewDidLoad
{
    [super viewDidLoad];
    NSLog(@"view did load");

    [thetitle setText:self.thetitleText];
    NSLog(@"thetitle text set");


// Do any additional setup after loading the view from its nib.
//    [thetitle setText:title];
//    NSLog(@"set title");
//    [thesubtitle setText:subtitle];
//    NSLog(@"set subtitle");
//    thepicture = picture;
//    [thedescription setText:description];
//    NSLog(@"set description");
}

实施：

@interface DetailViewController : UIViewController {
    IBOutlet UIScrollView *scrollview;
    IBOutlet UILabel *thetitle;
    NSString *thetitleText;
    IBOutlet UILabel *thesubtitle;
    IBOutlet UIImage *thepicture;
    IBOutlet UITextView *thedescription;
}

@property (nonatomic, retain) UIScrollView *scrollview;
@property (nonatomic, retain) UILabel *thetitle;
@property (nonatomic, retain) NSString *thetitleText;
@property (nonatomic, retain) UILabel *thesubtitle;
@property (nonatomic, retain) UIImage *thepicture;
@property (nonatomic, retain) UITextView *thedescription;

// method that creates the custom detail view with the corresponding information from
// the point of interest objects
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil title:(NSString*)title subtitle:(NSString *)subtitle picture:(UIImage *)picture description:(NSString *)description;

@end

@implementation DetailViewController

@synthesize scrollview, thetitle, thesubtitle, thepicture, thedescription, thetitleText;


- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil title:(NSString *)title subtitle:(NSString *)subtitle picture:(UIImage *)picture description:(NSString *)description;
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        // Custom initialization
        NSLog(@"view initialized");
}
return self;
}

- (void)dealloc
{
    [scrollview release];
    [thetitle release];
    [thesubtitle release];
    [thepicture release];
    [thedescription release];
    [thetitleText release];
    [super dealloc];
}

- (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.
}

#pragma mark - View lifecycle

- (void)viewDidLoad
{
    [super viewDidLoad];
    NSLog(@"view did load");

    [thetitle setText:self.thetitleText];
    NSLog(@"thetitle text set");


// Do any additional setup after loading the view from its nib.
//    [thetitle setText:title];
//    NSLog(@"set title");
//    [thesubtitle setText:subtitle];
//    NSLog(@"set subtitle");
//    thepicture = picture;
//    [thedescription setText:description];
//    NSLog(@"set description");
}

以下是SIGABRT输出：

2011-07-12 19:05:06.678 MKEBAT[1687:ef03]标注附件

2011-07-12 19:05:06.679 MKEBAT[1687:ef03]美国银行大厦

2011-07-12 19:05:06.680 mkeBOAT[1687:ef03]（空）

2011-07-12 19:05:06.680 mkeBOAT[1687:ef03]（空）（空）

2011-07-12 19:05:06.680 mkeBOAT[1687:ef03]视图已初始化

2011-07-12 19:05:06.711 mkeBOAT[1687:ef03]*由于未捕获异常而终止应用程序

“NSUnknownKeyException”，原因：“[setValue:forUndefinedKey:]：此类不符合密钥描述的键值编码。”

我不认为字典工作正常，因为它为实际应该有内容的值输出null

---

谢谢你的帮助

我认为这是因为您的

@属性设置为
copy
应该是
retain
确保您的XIB中的文件所有者类别设置为DetailViewController。
您不应该这样做

[detailViewController autorelease];

将detailViewController推到堆栈之前

您应该首先将其推入导航堆栈，然后释放它，因为您不再需要它，而且导航堆栈现在是detailView控制器对象的所有者

因此，与其这样做

[detailViewController autorelease];

// this is the line that breaks with SIGABRT
[self.navigationController pushViewController:detailViewController animated:YES];

这样做

[self.navigationController pushViewController:detailViewController animated:YES];
[detailViewController release];

更多信息：

SIGABRT通常发生在IB中有剩余的引用出口，但ur控制器中的对象不再存在时

您应该检查所有引用出口。
您的实现中存在一些错误：

1） 不使用固定值调用父方法：

self=[super initWithNibName:@“DetailViewController”捆绑包：nil]

而是使用参数：

self=[super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]

2） 标题和子标题属性是IBUILabel，但您使用的是“复制”而不是“保留”，请按“保留”更改“复制”

3） 在init方法中初始化UILabel（title和subtitle）文本，但在此方法中，尚未定义属性（title和subtitle=nil）

您应该改为使用NSString属性，并使用NSString属性设置viewDidLoad方法中UILabel的文本

并对UITextField的Description属性执行相同的操作

别忘了释放dealoc中复制或保留的所有属性，并在viewDidUnload方法中重置IBOutlet属性

关于第3点：

将NSString属性添加到您的DetailViewController（不要忘记在dealloc中合成并发布它）：

@属性（非原子，保留）NSString*标题文本

接下来，在pushViewController之前，添加：

detailViewController.TheTitletText=标题

最后，在DetailViewController的viewDidLoad方法中，添加：

[标题设置文本：self.thetitleText]

并对其他标签执行相同操作。
重新启动并创建新的详细视图控制器后，我非常确定我的视图链接到了图像，而不是实际视图。更复杂的是，我还认为我的滚动视图真的把事情搞砸了。如果有人想看到真正有效的代码，请告诉我。谢谢大家的贡献！！SOverflow是一个多么伟大的社区啊
 仔细阅读代码

您使用以下方法初始化了对象：

PointOfInterest*object=[[PointOfInterest alloc]init]

为什么要这样重新分配
对象
：

object=[dictionary objectForKey:viewTitle]

所以，不管在这个问题上，但这里有一个漏洞。另外，我很确定崩溃是由于使用
viewttitle
对应的键将
object
重新指定给值，稍后尝试向其发送消息，以及您刚刚想到操作类型为
PointOfInterest
的对象

希望这有帮助。
确保您的视图控制器具有视图。正如问题中所述，我的视图正在轰炸（SIGABRT），因为我在IB中忘记了将视图出口（通常在xib文件中为您创建）连接到控制器的视图。
更改后，仍然与SIGABRT崩溃。请尝试检查所有引用出口。通常是sigbrtalso的原因，请尝试执行此操作NSString*viewTitle=view.annotation.title；NSLog（@“%@”，视图标题）；可能是尼利，它可以毫无问题地通过这一关。问题似乎是在尝试初始化细节视图时出现的。2011-07-12 18:07:10.954 MKEBAT[433:ef03]调用附件点击2011-07-12 18:07:10.957 MKEBAT[433:ef03]美国银行大厦2011-07-12 18:07:10.957 MKEBAT[433:ef03]进入初始化2011-07-12 18:07:10.957 MKEBAT[433:ef03]设置标题2011-07-12 18:07:07:10.957 MKEBAT[433:ef03]集合字幕2011-07-12 18:07:10.957 mkeBOAT[433:ef03]集合描述2011-07-12 18:07:11.682 mkeBOAT[433:ef03]***由于未捕获的异常“NSUnknownKeyException”而终止应用程序，原因：“[setValue:forUndefinedKey:：此类不符合密钥描述的键值编码。在inspector窗口中，我在哪里