从地图视图中删除注释时出现问题
我将添加的所有注释存储在单独的数组中。当我尝试使用以下代码删除已添加到 mapView 的注释时：
if(![newClusters containsObject:cluster]){
[__mapView removeAnnotations:[__clusterAnnotations objectAtIndex:[__clusters indexOfObject:cluster]]];
[__clusterAnnotations removeObjectAtIndex:[__clusters indexOfObject:cluster]];
[__clusters removeObject:cluster];
}
我收到以下错误：
-[ClusterAnnotationClass countByEnumeratingWithState:objects:count:]: unrecognized selector sent to instance
我不确定这意味着什么，我可以添加任何注释。从地图视图中删除时会崩溃。
任何帮助将不胜感激。
I am storing all the annotations I am adding in a separate array. When I try to remove an annotation that has been added to the mapView using the following code:
if(![newClusters containsObject:cluster]){
[__mapView removeAnnotations:[__clusterAnnotations objectAtIndex:[__clusters indexOfObject:cluster]]];
[__clusterAnnotations removeObjectAtIndex:[__clusters indexOfObject:cluster]];
[__clusters removeObject:cluster];
}
I get the following error:
-[ClusterAnnotationClass countByEnumeratingWithState:objects:count:]: unrecognized selector sent to instance
I'm not sure what this means, and I can add in any annotation just fine. It crashes when removing from the mapView.
Any help would be appreciated.
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您正在调用
removeAnnotations（复数），它接受一个注释数组，但看起来您传递的对象不是一个数组。也许您想调用
removeAnnotation（单数）？You are calling
removeAnnotations(plural) which takes an array of annotations but it looks like the object you are passing it is not an array.Perhaps you meant to call
removeAnnotation(singular)?