删除注释时 MKMapView 泄漏还是只有我泄漏？

Question

我的注释被泄露了。有问题的代码（精简到最低限度）是：

- (void)updateLocations:(NSArray *)result {
    [mapView removeAnnotations:locations];
    [locations removeAllObjects];
    [allLocations removeAllObjects];
    for (NSDictionary *location in result) {
        LocationAnnotation *annote = [[LocationAnnotation alloc] initWithInfo:location];
        [allLocations addObject:annote];
        [annote release];
    }
    [self updateAnnotations];
}

- (void)filterLocations {
    for (LocationAnnotation *annote in allLocations) {
        if (annote.typeFlag & filterFlags) {
            [locations addObject:annote];
        }
    }
}

- (void)updateAnnotations {
    [self filterLocations];
    [mapView addAnnotations:locations];
}

- (void)updateFilter {
    [mapView removeAnnotations:locations];
    [locations removeAllObjects];
    [self updateAnnotations];
}

allLocations 是一个包含所有注释的数组（它们不一定在地图上），locations 是保存地图中实际显示的位置的数组。当调用 updateLocations: 时，添加到地图中的部分（或全部，它会随着测试的不同而变化）注释会泄漏。注释的分配历史是：

#   Category            Event Type  Timestamp   RefCt   Address     Size    Responsible Library Responsible Caller
0   LocationAnnotation  Malloc      16421111296 1       0x4953870   64      MyApp               -[MapViewController updateLocations:]
1   LocationAnnotation  Retain      16421383424 2       0x4953870   0       MyApp               -[MapViewController updateLocations:]
2   LocationAnnotation  Release     16421391104 1       0x4953870   0       MyApp               -[MapViewController updateLocations:]
3   LocationAnnotation  Retain      16444210176 2       0x4953870   0       MyApp               -[MapViewController filterLocations]
4   LocationAnnotation  Retain      16557738240 3       0x4953870   0       MapKit              -[MKQuadTrie insert:]
5   LocationAnnotation  Retain      16557750272 4       0x4953870   0       MapKit              -[MKAnnotationContainerView addAnnotation:]
6   LocationAnnotation  Retain      16564529408 5       0x4953870   0       MapKit              -[MKQuadTrie insert:]
7   LocationAnnotation  Release     17296397312 4       0x4953870   0       MapKit              -[MKAnnotationContainerView showAddedAnnotationsAnimated:]
8   LocationAnnotation  Retain      21832317184 5       0x4953870   0       MapKit              -[MKAnnotationContainerView removeAnnotation:]
9   LocationAnnotation  Autorelease 21832324096         0x4953870   0       MapKit              -[MKAnnotationContainerView removeAnnotation:]
10  LocationAnnotation  Release     21832350208 4       0x4953870   0       MapKit              -[MKQuadTrie remove:]
11  LocationAnnotation  Release     21920062208 3       0x4953870   0       MyApp               -[MapViewController updateLocations:]
12  LocationAnnotation  Release     21923836416 2       0x4953870   0       MyApp               -[MapViewController updateLocations:]
13  LocationAnnotation  Release     22050286336 1       0x4953870   0       Foundation          -[NSAutoreleasePool drain]

从这个来看，罪魁祸首似乎是 [MKQuadTrie insert:] 被调用了两次，而只调用了一次 [MKQuadTrie remove:] 。我是否遗漏了某些东西，这是我的错，还是 MKMapKit 中的错误？

编辑：我看到分配历史有 14 个 [MKQuadTrie insert:] 调用，只有 1 个 [MKQuadTrie remove:]

Answer 1

好吧，我为我解决了这个问题

，我试图删除所有注释并添加新注释（但我的代码确保它不会删除用户位置）。这与该代码有关，

我用此代码替换了它

[self.map removeAnnotations: [self.map.annotations filteredArrayUsingPredicate:[NSPredicate predicateWithFormat:@"!(self isKindOfClass: %@)", [MKUserLocation class]]]];

，现在我没有遇到同样的问题。