Question

在这一点上磕磕绊绊，我已经用尽了很多时间。我看了几个其他的问题和答案，但似乎无法解决这个问题。现在代码只是使所有注释都相同，这是我的数组中的最后一个图像。基本上，我想根据字典中的图像更改每个图钉的注释图像。因此，地图上的所有60个引脚都将是不同的图像。这是我设置注释的方法：

//Remove any existing custom annotations but not the user location blue dot.
for (id<MKAnnotation> annotation in mapView.annotations)
{
    if ([annotation isKindOfClass:[MapPoint class]])
    {
        [mapView removeAnnotation:annotation];
    }
}

 NSArray *dict = [NSArray arrayWithContentsOfFile:[[NSBundle mainBundle]  pathForResource:@"FastFood" ofType:@"plist"]];


//Access name value in dictionary, store to array
//  NSArray *nameFromPlist = [dict valueForKey:@"name"];
//Loop through the array of places returned from the Google API.
for (int i=0; i<[data count]; i++)
{
    int currentIndex = -1;

    for (NSDictionary *plistname in [dict valueForKey:@"name"])//nameFromPlist[@"name"])
  {
      currentIndex++;

    NSPredicate *inBothLists=[NSPredicate predicateWithFormat:@"Self CONTAINS[c] %@", plistname];
      BOOL result = [inBothLists evaluateWithObject:[[data objectAtIndex:i] objectForKey:@"name"]];

      if (result == YES)
      {
    //Retrieve the NSDictionary object in each index of the array.
    NSDictionary* place = [data objectAtIndex:i];

    NSDictionary* image = [dict objectAtIndex:currentIndex];

    //There is a specific NSDictionary object that gives us location info.
    NSDictionary *geo = [place objectForKey:@"geometry"];

          imgRestLogo = nil;
          imgRestLogo = [UIImage imageNamed:[image objectForKey:@"image"]];
        //  NSString *imgtest= [image objectForKey:@"image"];
       //   NSLog(@"Image Filename is: %@ " , imgtest);

    //Get our name and address info for adding to a pin.
    NSString *name=[place objectForKey:@"name"];
    NSString *vicinity=[place objectForKey:@"vicinity"];

    //Get the lat and long for the location.
    NSDictionary *loc = [geo objectForKey:@"location"];

    //Create a special variable to hold this coordinate info.
    CLLocationCoordinate2D placeCoord;

    //Set the lat and long.
    placeCoord.latitude=[[loc objectForKey:@"lat"] doubleValue];
    placeCoord.longitude=[[loc objectForKey:@"lng"] doubleValue];

    //Create a new annotiation.
    MapPoint *placeObject = [[MapPoint alloc] initWithName:name address:vicinity    coordinate:placeCoord];


    [mapView addAnnotation:placeObject];


      }

这是我的viewForAnnotation方法：

- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>)annotation {

//Define our reuse indentifier.
static NSString *identifier = @"MapPoint";


if ([annotation isKindOfClass:[MapPoint class]]) {

    MKAnnotationView *annotationView = (MKAnnotationView *) [self.mapView dequeueReusableAnnotationViewWithIdentifier:identifier];
    if (annotationView == nil) {
        annotationView = [[MKAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:identifier];

    } else {
        annotationView.annotation = annotation;
    }

    annotationView.enabled = YES;
    annotationView.canShowCallout = YES;

UIImage *image = imgRestLogo; //[UIImage imageNamed:@"GMPin.png"];
annotationView.image = image;

    return annotationView;
}

return nil;
}

提前致谢！

Answer 1

我的建议是首先使用imageName属性对MKAnnotation进行子类化，假设您有一个名为MYAnnotation的类



    @interface MYAnnotation : NSObject 
    @property (copy, nonatomic) NSString *title;
    @property (copy, nonatomic) NSString *subtitle;
    @property (copy, nonatomic) NSString *imageName;
    @end

然后添加您的图像名称。（注意：获取图像名称的方法取决于plist文件的结构。）



    NSDictionary *imageName = [dict objectAtIndex:currentIndex];
    annotation.imageName = imageName;

在委托中，按以下方式设置图像。


    MKAnnotationView *annotationView = (MKAnnotationView *) [self.mapView dequeueReusableAnnotationViewWithIdentifier:identifier];
    if (annotationView == nil) {
        annotationView = [[MKAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:identifier];
    } else {
        annotationView.annotation = annotation;
    }

    annotationView.enabled = YES;
    annotationView.canShowCallout = YES;

    NSString *imageName = ((MYAnnotation *)annotation).imageName;
    UIImage *image = [UIImage imageNamed:imageName];
    annotationView.image = image;

    return annotationView;

添加多个注释图像

1 个答案: