dequeueReusableAnnotationViewWithIdentifierを使用しているときにEXC_BAD_ACCESS

Question

何かの理由で、私のmapviewと注釈はdequeueReusableAnnotationViewWithIdentifierなしで正常に動作しますが、コメントを外して使用しようとするとすぐにプログラムがクラッシュします。エラーはEXC_BAD_ACCESSです。

#import "ThirdViewController.h" 
#import "MKMapView+ZoomLevel.h" 
#import "CalcBlockID.h" 
#import "CalcBorderBlocks.h" 
#import "MakeBlocksQuery.h" 
#import "Block.h" 


@implementation ThirdViewController 
@synthesize mapView = mapView_; 
@synthesize zoomLabel = zoomLabel_; 

@synthesize blockID = blockID_; 
@synthesize blockArray = blockArray_; 
@synthesize query = query_; 

static ThirdViewController *currentInstance; 

- (void)viewDidLoad { 
    [super viewDidLoad]; 
    blockStorage_ = [BlockStorage instance]; 
    restDelegate_ = [RESTDelegate instance]; 
    currentInstance = self; 

    self.mapView.delegate = self; 
    self.mapView.showsUserLocation = 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 { 
    [super viewDidUnload]; 
    self.mapView = nil; 
    self.zoomLabel = nil; 

    self.blockID = nil; 
    self.blockArray = nil; 
    self.query = nil; 
} 

- (void)dealloc { 
    [mapView_ release]; 
    [zoomLabel_ release]; 

    [blockID_ release]; 
    [blockArray_ release]; 
    [query_ release]; 
    [super dealloc]; 
} 

+ (ThirdViewController *)returnSelf { 
    return currentInstance; 
} 

#pragma mark - Key Methods 

// Called when objects are recieved from RESTDelegate class 
- (void)addAnnotations:(NSArray *)blocks { 
    [self.mapView addAnnotations:blocks]; 
} 

// Called whenever the current map view region is changed. 
- (void)mapView:(MKMapView *)mapView regionDidChangeAnimated:(BOOL)animated { 
    latitude_ = self.mapView.region.center.latitude; 
    longitude_ = self.mapView.region.center.longitude; 
    zoom_ = [self.mapView zoomLevel]; 

    CalcBlockID *calcBlockID = [[CalcBlockID alloc] init]; 
    self.blockID = [calcBlockID calcWithLat:latitude_ andLong:longitude_ andZoom:zoom_]; 
    [calcBlockID release]; 

    CalcBorderBlocks *calcBorderBlocks = [[CalcBorderBlocks alloc] init]; 
    self.blockArray = [calcBorderBlocks calcWithBlockID:self.blockID]; 
    [calcBorderBlocks release]; 

    MakeBlocksQuery *makeBlocksQuery = [[MakeBlocksQuery alloc] init]; 
    self.query = [makeBlocksQuery makeWithBlockArray:self.blockArray]; 
    [makeBlocksQuery release]; 

    if (self.query) { 
    [restDelegate_ loadBlocksWithQuery:self.query]; 
    } 
} 

- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id<MKAnnotation>)annotation { 
    // If annotation is of user's location, return nil to use default view. 
    if ([annotation isKindOfClass:[MKUserLocation class]]) { 
    return nil; 
    } 

    // Try to dequeue an existing pin. 
    static NSString *viewIdentifier = @"annotationView"; 
    MKPinAnnotationView *pinAnnotationView = (MKPinAnnotationView *)[self.mapView dequeueReusableAnnotationViewWithIdentifier:viewIdentifier]; 

    if (!pinAnnotationView) { 
    pinAnnotationView = [[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:viewIdentifier]; 
    pinAnnotationView.pinColor = MKPinAnnotationColorPurple; // PURPLE! 
    } else { 
    pinAnnotationView.annotation = annotation; 
    } 
    return [pinAnnotationView autorelease]; 
} 

@end 

ここでクラッシュレポートの一つです：

0x0163408c <+0000> mov 0x8(%esp),%ecx 
0x01634090 <+0004> mov 0x4(%esp),%eax 
0x01634094 <+0008> test %eax,%eax 
0x01634096 <+0010> je  0x16340ea <objc_msgSend+94> 
0x01634098 <+0012> mov (%eax),%edx 
0x0163409a <+0014> push %edi 
0x0163409b <+0015> mov 0x8(%edx),%edi 
0x0163409e <+0018> push %esi 
0x0163409f <+0019> mov (%edi),%esi 
0x016340a1 <+0021> mov %ecx,%edx 
0x016340a3 <+0023> shr $0x2,%edx 
0x016340a6 <+0026> and %esi,%edx 
0x016340a8 <+0028> mov 0x8(%edi,%edx,4),%eax 
0x016340ac <+0032> test %eax,%eax 
0x016340ae <+0034> je  0x16340b9 <objc_msgSend+45> 
0x016340b0 <+0036> cmp (%eax),%ecx 
0x016340b2 <+0038> je  0x16340d0 <objc_msgSend+68> 
0x016340b4 <+0040> add $0x1,%edx 
0x016340b7 <+0043> jmp 0x16340a6 <objc_msgSend+26> 
0x016340b9 <+0045> pop %esi 
0x016340ba <+0046> pop %edi 
0x016340bb <+0047> mov 0x4(%esp),%eax 
0x016340bf <+0051> mov (%eax),%eax 
0x016340c1 <+0053> jmp 0x16340d9 <objc_msgSend+77> 
0x016340c3 <+0055> nopw 0x0(%eax,%eax,1) 
0x016340c9 <+0061> nopl 0x0(%eax) 
0x016340d0 <+0068> mov 0x8(%eax),%eax 
0x016340d3 <+0071> pop %esi 
0x016340d4 <+0072> pop %edi 
0x016340d5 <+0073> xor %edx,%edx 
0x016340d7 <+0075> jmp *%eax 
0x016340d9 <+0077> sub $0x4,%esp 
0x016340dc <+0080> push %ecx 
0x016340dd <+0081> push %eax 
0x016340de <+0082> call 0x16211ae <_class_lookupMethodAndLoadCache> 
0x016340e3 <+0087> add $0xc,%esp 
0x016340e6 <+0090> xor %edx,%edx 
0x016340e8 <+0092> jmp *%eax 
0x016340ea <+0094> call 0x16340ef <objc_msgSend+99> 
0x016340ef <+0099> pop %edx 
0x016340f0 <+0100> mov 0xbba21(%edx),%eax 
0x016340f6 <+0106> test %eax,%eax 
0x016340f8 <+0108> je  0x1634100 <objc_msgSend+116> 
0x016340fa <+0110> mov %eax,0x4(%esp) 
0x016340fe <+0114> jmp 0x1634098 <objc_msgSend+12> 
0x01634100 <+0116> mov $0x0,%edx 
0x01634105 <+0121> ret  
0x01634106 <+0122> xchg %ax,%ax 

Answer 1

あなたがアンバランスのリリースを持っているので、問題はあなたがデキューされた注釈をかけて放出していることです。

MKPinAnnotationView *pinAnnotationView = (MKPinAnnotationView *)[self.mapView dequeueReusableAnnotationViewWithIdentifier:viewIdentifier]; // +0 retain count 

if (!pinAnnotationView) { 
    pinAnnotationView = [[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:viewIdentifier]; // +1 retain count 
    // ... 
} 
return [pinAnnotationView autorelease]; // release! 

ので、代わりにあなたは "クラッシュレポート" は、単に `objc_msgSend（）`の解体である

[[self.mapView dequeueReusableAnnotationViewWithIdentifier:viewIdentifier] retain] 

または

[[[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:viewIdentifier] autorelease] 
// and don't -autorelease later.