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iphone - objc_msg发送崩溃:如何找到位置?

转载 作者:行者123 更新时间:2023-12-03 16:16:46 25 4
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启用的nszombies
任何人都可以在此调试日志中看到的其他信息可以用来查找问题吗?

(gdb) bt  
0 0x30b7eca4 in objc_msgSend ()
1 0x36179302 in -[MKMapView annotationContainer:viewForAnnotation:] ()
2 0x36178f94 in -[MKAnnotationContainerView _addViewForAnnotation:] ()
3 0x361a2faa in -[MKAnnotationContainerView userLocationAnnotationWillShow] ()
4 0x3619fcbe in -[MKMapView(UserPositioningInternal) _runPositioningChange] ()
5 0x3619da8c in -[MKMapView(UserPositioningInternal) _startPositioningChange:] ()
6 0x361a1050 in -[MKMapView(UserPositioningInternal) locationManagerUpdatedLocation:] ()
7 0x365cff02 in -[NSObject(NSObject) performSelector:withObject:] ()
8 0x3660d2f8 in -[NSArray makeObjectsPerformSelector:withObject:] ()
9 0x36190808 in -[MKLocationManager _reportLocationStatus:] ()
10 0x36191d72 in -[MKLocationManager _reportLocationSuccess] ()
11 0x361919cc in -[MKLocationManager locationManager:didUpdateToLocation:fromLocation:] ()
12 0x33bfbc2c in -[CLLocationManager onClientEventLocation:] ()
13 0x33bfbf48 in -[CLLocationManager onClientEvent:supportInfo:] ()
14 0x33bfdd04 in OnClientEventInternal ()
15 0x33bf57a2 in CLClientInvokeCallback ()
16 0x33bf7c46 in CLClientHandleDaemonDataLocation ()
17 0x33bf7d9c in CLClientHandleDaemonData ()
18 0x3663070c in __CFMessagePortPerform ()
19 0x36639a96 in __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ ()
20 0x3663b83e in __CFRunLoopDoSource1 ()
21 0x3663c60c in __CFRunLoopRun ()
22 0x365ccec2 in CFRunLoopRunSpecific ()
23 0x365ccdca in CFRunLoopRunInMode ()
24 0x313c141e in GSEventRunModal ()
25 0x313c14ca in GSEventRun ()
26 0x33390d68 in -[UIApplication _run] ()
27 0x3338e806 in UIApplicationMain ()
28 0x000039ca in main (argc=1, argv=0x2fdff55c) at main.m:14
(gdb)

更新:
- (MKAnnotationView *)mapView:(MKMapView *)map viewForAnnotation:(id <MKAnnotation>)annotation
{


MKAnnotationView* annView = nil;

if ( [annotation isKindOfClass: [AnnotationItem class]] )
{
MKPinAnnotationView* pin = (MKPinAnnotationView*)[mapView dequeueReusableAnnotationViewWithIdentifier: kListingAnnotationIdentifier];

if ( nil == pin )
{
pin = [[[MKPinAnnotationView alloc] initWithAnnotation: annotation reuseIdentifier: kListingAnnotationIdentifier] autorelease];
}
else
{
[pin setAnnotation: annotation];
}

pin.canShowCallout = YES;

pin.pinColor = MKPinAnnotationColorGreen;


UIImage* img = [UIImage imageNamed: @"logap.png"] ;
pin.leftCalloutAccessoryView = [[[UIImageView alloc] initWithImage: img] autorelease];


pin.rightCalloutAccessoryView = [UIButton buttonWithType: UIButtonTypeDetailDisclosure];

annView = pin;

}
return annView;



}

最佳答案

当mapView试图显示(更改)用户位置时,调试日志将显示崩溃。用户位置是对MKUserLocation类的注释,如果该注释传递给mapView:viewForAnnotation的实现,则您的代码将返回指向nil的指针(即,它将返回一个名为MKAnnotationViewannView对象,其值设置为nil)。

因此,我怀疑您是在用户位置出现或在屏幕上移动时崩溃的,还是nil与“值设置为MKAnnotationViewnil对象”之间的差异可能在难以复制的时间突然对Cocoa产生了影响。尝试测试注释是否为MKUserLocation类,并在这种情况下显式返回nil

关于iphone - objc_msg发送崩溃:如何找到位置?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/6680183/

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