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我有一个我开发的 IOS 应用程序，当通过 xCode 部署时，它在模拟器和我的IPOD touch 上运行良好。我试图通过 TestFlight 与测试人员分享它；但应用程序总是遇到 SIGSEGV 异常。当我通过 TestFlight 加载应用程序时，我的 IPOD 触摸发生了同样的异常；但当我在我的IPOD touch上通过xCode运行应用程序时不会。

我已尽力追踪问题并使用远程日志记录并确定了失败的代码行；我不清楚它为什么会失败，我能做些什么，以及为什么它可以通过 xCode 而不是 TestFlight。

这是注销放置：

2012-09-16 14:46:41 TestFlight: Crash Handlers are installed
2012-09-16 14:46:41 Bootstrap
2012-09-16 14:46:41 bind settingsLoaded
2012-09-16 14:46:41 adding listeners to map
2012-09-16 14:46:41 listener map {
settingsLoaded = "{(\n)}";
}
2012-09-16 14:46:41 Loading appModel
2012-09-16 14:46:41 Loading settings
2012-09-16 14:46:41 Waiting for data to load
2012-09-16 14:46:42 TestFlight: Team Token is recognized
2012-09-16 14:46:42 Loading settings content
2012-09-16 14:46:42 Loading startScreen
2012-09-16 14:46:42 Loading jpegQuality
2012-09-16 14:46:42 Loading paperSize
2012-09-16 14:46:42 Loading showGrid
2012-09-16 14:46:42 Loading cropMode
2012-09-16 14:46:42 Loading filterType
2012-09-16 14:46:42 Loading adjustAllPages
2012-09-16 14:46:42 Loading settings complete
2012-09-16 14:46:42 triggering settings loaded
2012-09-16 14:46:42 trigger settingsLoaded
2012-09-16 14:46:42 triggerEvent settingsLoaded
2012-09-16 14:46:42 getting listeners from map

这是我失败的类的头文件

#import <Foundation/Foundation.h>
#import "Gritz.h"

@interface GritzObject : NSObject {

    NSMutableDictionary *listenerMap;
}

#pragma creation

+ (GritzEvent*) create;

#pragma Events

- (void) bind:(void (^)(GritzEvent*))listener forEvent:(NSString*)name;
- (void) unbind:(void (^)(GritzEvent*))listener forEvent:(NSString*)name;
- (void) trigger:(NSString*)name;
- (void) triggerEvent:(GritzEvent*)event;

@end

这是失败的类的实现文件

#import "GritzObject.h"
#import "TestFlight.h"

@implementation GritzObject 

#pragma create

+ (GritzObject *)create {

    return [[GritzObject alloc] init];
}

- (id)init {

    self = [super init];
    if(self) {
        listenerMap = [[NSMutableDictionary alloc] init];
    }
    return self;
}

#pragma events

- (void)bind:(void (^)(GritzEvent*))listener forEvent:(NSString *)name {

    TFLog(@"bind %@", name);

    NSMutableSet* listeners = [listenerMap objectForKey:name];

    if(nil == listeners) {

        TFLog(@"adding listeners to map");

        listeners = [[NSMutableSet alloc] init];

        [listenerMap setValue:listeners forKey:name];

        TFLog(@"listener map %@", listenerMap);
    }

    [listeners addObject:listener];
}

- (void)unbind:(void (^)(GritzEvent*))listener forEvent:(NSString *)name {

    TFLog(@"unbind %@", name);

    NSMutableSet* listeners = [listenerMap objectForKey:name];

    if(nil != listeners) {
        [listeners removeObject:listener];
    }
}

- (void)trigger:(NSString *)name {

    TFLog(@"trigger %@", name);

    [self triggerEvent:[GritzEvent withName:name]];
}

- (void)triggerEvent:(GritzEvent *)event {

    TFLog(@"triggerEvent %@", event.name);

    TFLog(@"getting listeners from map");

    TFLog(@"listener map %@", listenerMap); // This throws a SIGSEGV exception

    NSMutableSet* listeners = [listenerMap objectForKey:event.name];

    TFLog(@"inspecting listeners array");

    if(nil != listeners) {

        for (void (^listener)(GritzEvent*) in listeners) {
            listener(event);
        }
    }
    else {

        TFLog(@"no listeners found for event %@", event.name);
    }
}

@end

从日志语句中我可以看出，尝试访问listnerMap 时会发生异常。看起来这个变量正在被取消引用；但目前尚不清楚为什么或我能做些什么？

我正在为这个应用程序使用 ARC。

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1 回答 1

1

我遇到的问题是通过在将块存储到 NSSet 之前“复制”块来解决的。在将块存储到集合中之前，必须对其进行复制。

我改变了这条线

[listeners addObject:listener];

至

[listeners addObject:[listener copy]];
于 2012-09-20T05:20:55.950 回答