StackOverflow2013

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Id
12512180
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2012-09-20T12:01:31.350
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2012-09-20T12:01:31.350
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981968
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12205051
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text
Body
I think I had the same problem. My background thread was adding/removing the annotations but the button on an annotation will be added in the main thread. This also means that the main thread does an enumeration on the annotations (for some reason). I fixed it by doing the adding in the main thread. Problem exists only on iOS 6. I'm not sure what your exception was but mine was: <blockquote> * Collection <__NSArrayM: 0x136d57c0> was mutated while being enumerated. </blockquote> <pre><code>0 CoreFoundation 0x0330e02e __exceptionPreprocess + 206 1 libobjc.A.dylib 0x02735e7e objc_exception_throw + 44 2 CoreFoundation 0x03396cc5 __NSFastEnumerationMutationHandler + 165 3 MapKit 0x0231748c -[MKAnnotationContainerView _updateAnnotationViewPerspective] + 399 4 MapKit 0x02305520 -[MKMapView _updateScrollContainerView:] + 2478 5 MapKit 0x02303e10 -[MKMapView _didChangeRegionMidstream:] + 97 6 MapKit 0x02305d66 -[MKMapView _goToMapRegion:duration:animationType:] + 828 7 MapKit 0x023061bd -[MKMapView _setZoomScale:centerMapPoint:duration:animationType:] + 711 8 MapKit 0x02305a24 -[MKMapView _setZoomScale:centerCoordinate:duration:animationType:] + 121 9 MapKit 0x02307f8f -[MKMapView _goToCenterCoordinate:zoomLevel:animationType:cancelDefaultLocationTimer:] + 950 10 MapKit 0x023075fb -[MKMapView goToCenterCoordinate:zoomLevel:animationType:] + 81 11 MapKit 0x023076c9 -[MKMapView goToCenterCoordinate:longLatSpan:animationType:] + 178 12 MapKit 0x0230992a -[MKMapView goToDefaultLocation] + 415 13 Foundation 0x009a0b90 __NSFireTimer + 97 14 CoreFoundation 0x032cd376 __CFRUNLOOP_IS_CALLING_OUT_TO_A_TIMER_CALLBACK_FUNCTION__ + 22 15 CoreFoundation 0x032cce06 __CFRunLoopDoTimer + 534 16 CoreFoundation 0x032b4a82 __CFRunLoopRun + 1810 17 CoreFoundation 0x032b3f44 CFRunLoopRunSpecific + 276 18 CoreFoundation 0x032b3e1b CFRunLoopRunInMode + 123 19 GraphicsServices 0x03c557e3 GSEventRunModal + 88 20 GraphicsServices 0x03c55668 GSEventRun + 104 21 UIKit 0x00d3465c UIApplicationMain + 1211 22 myApp 0x00002c93 myApp + 7315 23 myApp 0x00002bd5 myApp + 7125 </code></pre>
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Title
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PostAcceptedAnswerId
1. This table or related slice is empty.
PostParentId
1. POaltering the mkmapview (removing annotations)
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 PTQuestion
PostTypePostTypeId
1. PTAnswer
UserLastEditorUserId
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UserOwnerUserId
1. USSjoerd Perfors
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