Question

我很早就开始工作，但之后就停止了，我不明白为什么。这是代码：

- (void)updateMarkers:(NSMutableArray *)myAudioLocationVOArray
{
 [self cleanupMarkers];

 NSLog(@"UPDATE ALL MARKERS");

 int tArrayCount = [myAudioLocationVOArray count];

 for (int i=0; i< tArrayCount; i = i + 1)
 {
  AudioLocationVO* tAudioLocVO = [myAudioLocationVOArray objectAtIndex:i];

  AudioAnnotation *tNewAnn = [[AudioAnnotation alloc] init];
  tNewAnn.coordinate = CLLocationCoordinate2DMake(tAudioLocVO.latitude, tAudioLocVO.longitude);
  // add current track if available
  tNewAnn.audioLocationVORef = tAudioLocVO;

  [self.mapView addAnnotation:tNewAnn];

  [tNewAnn release];
 }

}

- (void)cleanupMarkers
{
 NSLog(@"REMOVE ALL MARKERS");
 NSArray *tExistingPoints = self.mapView.annotations;
 if ([tExistingPoints count] > 0)
 {
  [self.mapView removeAnnotations:tExistingPoints];
 }
}


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

 if ([myAnnotation isKindOfClass:[AudioAnnotation class]])
    {
  AudioAnnotation *tAnnotation = (AudioAnnotation *)myAnnotation;

   MKAnnotationView *tNewMarkerView = [[[MKAnnotationView alloc] initWithAnnotation:tAnnotation reuseIdentifier:nil] autorelease];

   if(tAnnotation.audioLocationVORef.state == ANNOTATION_STATE_DROPPING)
   {
    NSLog(@"ADD DROP MARKER");
    [tNewMarkerView setImage:[UIImage imageNamed:@"greenmarker.png"]];
    tNewMarkerView.draggable = YES;
   }
   else
   {
    NSLog(@"ADD NEW MARKER");
    [tNewMarkerView setImage:[UIImage imageNamed:@"newMarker.png"]];
    tNewMarkerView.draggable = NO;
   }

   tNewMarkerView.frame = CGRectMake(tNewMarkerView.frame.origin.x,tNewMarkerView.frame.origin.y,20,26);

   tNewMarkerView.canShowCallout = YES;
   tNewMarkerView.enabled = YES;


   // callout button
   UIButton *tButton = [UIButton buttonWithType:UIButtonTypeDetailDisclosure];
   tNewMarkerView.rightCalloutAccessoryView = tButton;


   // cover art and title/subtitle
   UIButton *tCover = [UIButton buttonWithType:UIButtonTypeDetailDisclosure];
   if(tAnnotation.audioLocationVORef.trackVO==nil)
   {
    tAnnotation.title = @"Drop a Track";
    tAnnotation.subtitle = @"Choose a track to drop";
    [tCover setImage:[UIImage imageNamed:@"preCover.png"] forState:UIControlStateNormal];
   }
   else
   {
    tAnnotation.title = tAnnotation.audioLocationVORef.trackVO.songTitle;
    tAnnotation.subtitle = tAnnotation.audioLocationVORef.trackVO.artist;

    NSLog(@"ADD DATA MARKER %@", tAnnotation.title);
    if(tAnnotation.audioLocationVORef.state==ANNOTATION_STATE_DROPPING){
     tAnnotation.subtitle = @"Touch submit to Drop";
    }
    [tCover setImage:[tAnnotation.audioLocationVORef.trackVO getCoverArt] forState:UIControlStateNormal];
   }
   // make cover enabled to see song detail?
   tCover.enabled = NO;

   tNewMarkerView.leftCalloutAccessoryView = tCover;

   [tCover release];

  return tNewMarkerView;
 }
 return nil;

}

我尝试删除并再次添加图形作为资源。我一直在玩框架属性。到目前为止没有运气。

为什么模拟器和设备之间存在差异。我在iPhone 4上使用SDK 4.2 ...

Answer 1

确保图像文件名与资源名称完全匹配，包括大写/小写。

例如，如果资源是“GreenMarker.png”，那么“greenmarker.png”只能在模拟器上工作，而不能在设备上工作。

Apple QA1697 (Why doesn't my device load a file that loads fine in the Simulator?)说：

区分大小写：iPhone OS使用了区分大小写的文件系统，不像使用的模拟器不区分大小写的文件系统默认。确保访问资源的区分大小写在代码中匹配文件名区分大小写。

Answer 2

是的，他们应该，但Mac保留了大小写，但也不区分大小写。模拟器在Mac上运行，这就是你得到的。

MKAnnotation在模拟器中显示自定义标记图形，但在设备上不显示

2 个答案: