MKMapView - 加载更多结果时未调用 viewForAnnotation

发布于 2024-08-26 07:12:19 字数 1384 浏览 6 评论 0原文

编辑添加 * 我还没有找到这个问题的解决方案，有人可以帮忙吗？我的问题与此类似，但发布的答案对我不起作用 - MKMapView 在 pin 后刷新移动 *结束编辑

我有一个启用搜索的地图视图。当用户点击搜索时，我的自定义注释将添加到地图视图中。搜索返回 20 个带有“加载更多”链接的结果。当我点击加载更多时，应该将更多注释添加到地图视图中。

问题是 - 注释被添加到地图视图中，但没有显示在地图上。如果我放大或缩小以更改地图区域，则会显示图钉。

我发现当我点击“加载更多”时， viewForAnnotations: 没有被调用。我不知道如何触发这个。任何一个吗？

-(void)completedSearch:(NSNotification *)resultNotification
 {
   //begin loop
   //get coordinate
   customAnnotation *annot = [[customAnnotation alloc] initWithCoordinate:coordinate];
   //set title subtitle 
   [annotationsArray addObject:annot];
   //end loop
   [mView addAnnotations:annotationsArray];
   [mView setRegion:region animated:YES];
   [mView regionThatFits:region];
 }

  //custom annotation
  @interface customAnnotation : NSObject <MKAnnotation> 
 { 
   CLLocationCoordinate2D coordinate;  
   NSString*              title; 
   NSString*              info; 
 } 
 @property (nonatomic, retain) NSSting *title;
 @property (nonatomic, retain) NSSting *info;

 -(id) initWithCoordinate:(CLLocationCoordinate2D)c;
 @end

 @implementation customAnnotation
 @synthesize coordinate, title, info;
 -(id) initWithCoordinate:(CLLocationCoordinate2D)c
 {
   coordinate = c;
   return self;
 }
 -(void)dealloc{//dealloc stuff here}
 @end

原文

Edited to Add * I haven't found a solution for this one yet, can anyone please help? My problem is similar to this but the answer posted doesn't t work for me - MKMapView refresh after pin moves *End Edit

I have a search enabled map view. When user hits search, my custom annotations are added to the map view. The search returns 20 results with a 'load more' link. When I hit load more, more annotations should be added to map view.

The problem is - annotations gets added to the map view but is not displayed on the map. If I zoom in or zoom out to change the map region, the pins are shown.

I find that viewForAnnotations: is not getting called when i hit 'load more'. I am not sure how to trigger this. any one?

-(void)completedSearch:(NSNotification *)resultNotification
 {
   //begin loop
   //get coordinate
   customAnnotation *annot = [[customAnnotation alloc] initWithCoordinate:coordinate];
   //set title subtitle 
   [annotationsArray addObject:annot];
   //end loop
   [mView addAnnotations:annotationsArray];
   [mView setRegion:region animated:YES];
   [mView regionThatFits:region];
 }

  //custom annotation
  @interface customAnnotation : NSObject <MKAnnotation> 
 { 
   CLLocationCoordinate2D coordinate;  
   NSString*              title; 
   NSString*              info; 
 } 
 @property (nonatomic, retain) NSSting *title;
 @property (nonatomic, retain) NSSting *info;

 -(id) initWithCoordinate:(CLLocationCoordinate2D)c;
 @end

 @implementation customAnnotation
 @synthesize coordinate, title, info;
 -(id) initWithCoordinate:(CLLocationCoordinate2D)c
 {
   coordinate = c;
   return self;
 }
 -(void)dealloc{//dealloc stuff here}
 @end

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百思不得你姐 2024-09-02 07:12:19

只是想确认
我正在从线程添加注释 - 这不起作用。
一旦我使用了这个（addCameraIconOnMain 添加了我的注释），

[self performSelectorOnMainThread:@selector(addCameraIconOnMain:) withObject:cd waitUntilDone:true];

它就起作用了！谢谢！

just wanted to confirm
i was adding annotations from a thread - which doesnt work.
once I used this (addCameraIconOnMain adds my annoations)

[self performSelectorOnMainThread:@selector(addCameraIconOnMain:) withObject:cd waitUntilDone:true];

its worked! thanks!

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脸赞 2024-09-02 07:12:19

这与接收通知然后添加注释引脚的时间间隔有关。强制它使用主线程添加注释引脚是有效的。

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欢烬 2024-09-02 07:12:19

就我而言，问题是我在地图委托之前添加注释。它一定是这样的：

- (void)viewDidLoad
{
    ...

   // map delegate
   [mView setDelegate:self];

   ...

   // add annotation
   [_map addAnnotation:_poiAnnotation];

   ...
}

in my case the problem was I was adding the annotation before the map delegate. It must be something like:

- (void)viewDidLoad
{
    ...

   // map delegate
   [mView setDelegate:self];

   ...

   // add annotation
   [_map addAnnotation:_poiAnnotation];

   ...
}

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~没有更多了~