当用户触摸注释时，无法识别的选择器崩溃

Posted 2023-05-08

【中文标题】当用户触摸注释时，无法识别的选择器崩溃

【英文标题】：Crash with unrecognized selector when user touches annotation

【发布时间】：2013-11-29 00:33:56

【问题描述】：

我有一个用于显示地图和自定义注释的应用程序。当用户触摸注释时，我的应用程序崩溃。它仅发生在 ios 7 中。它适用于 iOS 6 和 iOS 5。

以下是控制台中显示的崩溃报告：

ERROR: Trying to select an annotation which has not been added
-[__NSSetM coordinate]: unrecognized selector sent to instance 0x18c9d580
*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[__NSSetM coordinate]: unrecognized selector sent to instance 0x18c9d580'
*** First throw call stack:
(
    0   CoreFoundation                      0x020415e4 __exceptionPreprocess + 180
    1   libobjc.A.dylib                     0x016918b6 objc_exception_throw + 44
    2   CoreFoundation                      0x020de903 -[NSObject(NSObject) doesNotRecognizeSelector:] + 275
    3   CoreFoundation                      0x0203190b ___forwarding___ + 1019
    4   CoreFoundation                      0x0206e46e __forwarding_prep_1___ + 14
    5   MapKit                              0x000de10c _Z21_insertionNodeForItemP11objc_objectP14MKQuadTrieNode + 50
    6   MapKit                              0x000de428 _Z9_containsP11objc_objectP14MKQuadTrieNode + 27
    7   MapKit                              0x000de8ed -[MKQuadTrie contains:] + 39
    8   MapKit                              0x000d4918 -[MKAnnotationManager selectAnnotation:animated:avoid:] + 116
    9   MapKit                              0x00090789 -[MKMapView handleTap:] + 541
    10  UIKit                               0x0056ae8c _UIGestureRecognizerSendActions + 230
    11  UIKit                               0x00569b00 -[UIGestureRecognizer _updateGestureWithEvent:buttonEvent:] + 383
    12  UIKit                               0x0056b56d -[UIGestureRecognizer _delayedUpdateGesture] + 60
    13  UIKit                               0x0056eacd ___UIGestureRecognizerUpdate_block_invoke + 57
    14  UIKit                               0x0056ea4e _UIGestureRecognizerRemoveObjectsFromArrayAndApplyBlocks + 317
    15  UIKit                               0x00565148 _UIGestureRecognizerUpdate + 199
    16  CoreFoundation                      0x020094ce __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 30
    17  CoreFoundation                      0x0200941f __CFRunLoopDoObservers + 399
    18  CoreFoundation                      0x01fe7344 __CFRunLoopRun + 1076
    19  CoreFoundation                      0x01fe6ac3 CFRunLoopRunSpecific + 467
    20  CoreFoundation                      0x01fe68db CFRunLoopRunInMode + 123
    21  GraphicsServices                    0x01f6c9e2 GSEventRunModal + 192
    22  GraphicsServices                    0x01f6c809 GSEventRun + 104
    23  UIKit                               0x001f2d3b UIApplicationMain + 1225
    24  CustomMKAnnotationView              0x0000285a main + 170
    25  CustomMKAnnotationView              0x000027a5 start + 53
)
libc++abi.dylib: terminating with uncaught exception of type NSException

并且我以以下方式创建了代码：

-(void)mapView:(MKMapView *)mapView didSelectAnnotationView:(MKAnnotationView *)view

    if ([view.annotation isKindOfClass:[BasicMapAnnotation class]])
        
        if (_calloutAnnotation.coordinate.latitude == view.annotation.coordinate.latitude&&
            _calloutAnnotation.coordinate.longitude == view.annotation.coordinate.longitude)
        
            return;
        
        if (_calloutAnnotation)
        
            [mapView removeAnnotation:_calloutAnnotation];
            _calloutAnnotation = nil;
        
        _calloutAnnotation = [[[CalloutMapAnnotation alloc] 
                               initWithLatitude:view.annotation.coordinate.latitude
                              andLongitude:view.annotation.coordinate.longitude]autorelease];
        [mapView addAnnotation:_calloutAnnotation];

        [mapView setCenterCoordinate:_calloutAnnotation.coordinate animated:YES];
    else
    
        if([delegate respondsToSelector:@selector(customMKMapViewDidSelectedWithInfo:)])
        
            [delegate customMKMapViewDidSelectedWithInfo:@"Annotation clicked"];
        
    


-(void)mapView:(MKMapView *)mapView didDeselectAnnotationView:(MKAnnotationView *)view 
    
    if (_calloutAnnotation&& ![view isKindOfClass:[CallOutAnnotationVifew class]])
    
        if (_calloutAnnotation.coordinate.latitude == view.annotation.coordinate.latitude&&
            _calloutAnnotation.coordinate.longitude == view.annotation.coordinate.longitude)
        
            [mapView removeAnnotation:_calloutAnnotation];
            _calloutAnnotation = nil;
        
    


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

    if ([annotation isKindOfClass:[CalloutMapAnnotation class]])
    

        CallOutAnnotationVifew *annotationView = (CallOutAnnotationVifew *)[mapView     dequeueReusableAnnotationViewWithIdentifier:@"CalloutView"];
        if (!annotationView)
        
            annotationView = [[[CallOutAnnotationVifew alloc] initWithAnnotation:annotation reuseIdentifier:@"CalloutView"] autorelease];
            JingDianMapCell  *cell = [[[NSBundle mainBundle] loadNibNamed:@"JingDianMapCell" owner:self options:nil] objectAtIndex:0];
            cell.titleLable.text = @"Testing";
            [annotationView.contentView addSubview:cell];

        
        return annotationView;
    else if ([annotation isKindOfClass:[BasicMapAnnotation class]])
    

         MKAnnotationView *annotationView =[self.mapView dequeueReusableAnnotationViewWithIdentifier:@"CustomAnnotation"];
        if (!annotationView)
        
            annotationView = [[[MKAnnotationView alloc] initWithAnnotation:annotation 
                                                           reuseIdentifier:@"CustomAnnotation"] autorelease];
            annotationView.canShowCallout = NO;
            annotationView.image = [UIImage imageNamed:@"pin.png"];
        

        return annotationView;
    
    return nil;

在 didSelectAnnotationView 和 didDeselectAnnotationView 中，我添加了新的注释视图并删除了旧的注释视图。注释视图是自定义类。 _calloutAnnotation 是 CalloutMapAnnotation 的一个对象，它是用于添加注解的 NSObject 类。

【问题讨论】：

_calloutAnnotation 是做什么用的？你在你的应用程序中调用selectAnnotation 吗？简而言之，didSelectAnnotationView 和 didDeselectAnnotationView 中的代码是什么（如果答案很长，请在问题中添加解释）。

应用程序是否在任何地方调用 selectAnnotation？确保在添加注释 之后调用 selectAnnotation。当 _calloutAnnotation 或其他注释变量包含无效引用（不是 id）时，它看起来像被引用。

【参考方案1】：

_calloutAnnotation 不包含注释视图。我认为你有这样的代码 @prorerty (weak, nonatomic) MKAnnotation * calloutAnnotation; 将 weak 更改为 strong 应该会有所帮助。

【参考方案2】：

Marcin 部分正确。然而最终的线索在于ERROR: Trying to select an annotation which has not been added 这里发生的是用户点击一个“标注气泡”，它实际上是一个注释视图。作为其中的一部分，MapView 首先取消选择当前选定的注释，然后选择用户点击的注释。 但是，由于您已经在取消选择步骤中从地图中删除了要选择的注释，因此没有任何内容可供选择。因此调试器中的“错误...”消息。

-(void)mapView:(MKMapView *)mapView didDeselectAnnotationView:(MKAnnotationView *)view 

  if (_calloutAnnotation&& ![view isKindOfClass:[CallOutAnnotationVifew class]])
  
    if (_calloutAnnotation.coordinate.latitude == view.annotation.coordinate.latitude&&
        _calloutAnnotation.coordinate.longitude == view.annotation.coordinate.longitude)
    
        CalloutMapAnnotation *oldAnnotation = self.calloutAnnotation; //saving it to be removed from the map later
        self.calloutAnnotation = nil; //setting to nil to know that we aren't showing a callout anymore
        dispatch_async(dispatch_get_main_queue(), ^
            [mapView removeAnnotation:oldAnnotation]; //removing the annotation a bit later
        );
    
  

【讨论】：

是的，你是对的。这是处理这个问题的更清洁和更安全的方法。我的代码有可能以多个选定的注释结尾的影响错误。

【参考方案3】：

你的问题在这里：

-(void)mapView:(MKMapView *)mapView didDeselectAnnotationView:(MKAnnotationView *)view 
    
    if (_calloutAnnotation&& ![view isKindOfClass:[CallOutAnnotationVifew class]])
    
        if (_calloutAnnotation.coordinate.latitude == view.annotation.coordinate.latitude&&
            _calloutAnnotation.coordinate.longitude == view.annotation.coordinate.longitude)
        
            [mapView removeAnnotation:_calloutAnnotation];
//EDIT: This code is broken don't use it :)
            //in iOS7.0 responder chain is changed a bit and you can't call this directly give it some time or remove this line and your crash will be gone ;)
//            double delayInSeconds = 0.5;
//        dispatch_time_t popTime = dispatch_time(DISPATCH_TIME_NOW, (int64_t)(delayInSeconds * NSEC_PER_SEC));
//        dispatch_after(popTime, dispatch_get_main_queue(), ^(void)
//            _calloutAnnotation = nil;
//        );
        
    

【讨论】：

为了避免可能的竞争条件，我建议不要在超时后调度。以下内容也应该可以工作：dispatch_async(dispatch_get_main_queue(), ^self.calloutAnnotation = nil;); 或 [self performSelectorOnMainThread:@selector(setCalloutAnnotation:) withObject:nil waitUntilDone:NO]; 在任何一种情况下，只要主线程释放，就会在主线程上执行操作。此外，这仍然只是一种解决方法，不会清除控制台“错误...”消息。