在MKMapView中显示多个注释标注

问题描述

是否可以同时打开多个标注？

Is it possible to open simultaneously more then one callout?

代码：

- (void)mapViewDidFinishLoadingMap:(MKMapView *)theMapView {
    for (id<MKAnnotation> currentAnnotation in theMapView.annotations) {
        [theMapView selectAnnotation:currentAnnotation animated:YES];
    }
}

只打开一个标注。

推荐答案

注意 MKMapView 上有一个方法（不是 MKAnnotationView ）用于以编程方式选择一个或多或少有效的注释：

Note that there is a method on MKMapView (not MKAnnotationView) for selecting an annotation programmatically that works more or less as you would expect:

- (void)selectAnnotation:(id < MKAnnotation >)annotation animated:(BOOL)animated

然而，它会自动同时取消选择任何当前注释，这样就无法解决您的问题。

However, it automatically deselects any currently annotation at the same time so this doesn't solve your problem.

奇怪的是， MKMapView上有一个属性似乎包含当前所选注释的数组：

Oddly, there is a property on MKMapView that appears to hold an array of currently selected annotations:

@property(nonatomic, copy) NSArray *selectedAnnotations

但是这个方法的文档说：

But the documentation on this method says:

只是觉得这可能是有意义的。

Just thought this might be of interest.

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