iOS:缩小地图时应用程序崩溃 [英] iOS : App crashes when zooming out a map

问题描述

在这种情况下，缩小地图会导致我的应用崩溃.

I have this situation where my app crashes when I zoom out the map.

由于我要添加大量注释，所以出现了问题.请在下面查看我的代码:

The problem arises because of the large number of annotations that I'm adding. Please have a look at my code below :

- (void) plotUsersInMap
{
for (id<MKAnnotation> annotation in self.mapView.annotations) {
    [self.mapView removeAnnotation:annotation];
}

NSUInteger count = //get total count
NSLog(@"count * %d", count);
for (int i = 0; i < count; i++)
{
    NSNumber *latitude = //get latitude from json
    NSNumber *longitude = //get longitude from json

    CLLocationCoordinate2D coordinate;
    coordinate.latitude = latitude.doubleValue;
    coordinate.longitude = longitude.doubleValue;

    @autoreleasepool {

        MyLocation *annotation = [[MyLocation alloc] initWithName:@"test" coordinate:coordinate QuestionId:nil];
       //annotations are added
        [self.mapView addAnnotation:annotation];
    }
}
}

在这里，我尝试添加400多个引脚，这些引脚我认为是导致崩溃的原因[可能是内存泄漏！].我想知道在缩小时是否可以一一添加针脚吗?

Here I'm trying to add more than 400 pins which I think is the cause of crash [probably a memory leak!]. I would like to know if there is any way to add the pins one by one as I zoom out?

地图处于初始阶段，没有任何问题:

Map in initial stage, without any problem :

当我缩小时:

推荐答案

尝试集群.基本上，您将注释分组在一起.

Try clustering. Basically you group together annotations.

我链接到的文章中的代码回购: https://github.com/applidium/ADClusterMapView

The code repo from the article I linked to: https://github.com/applidium/ADClusterMapView

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