我有一个包含在 tabBarController 中的 viewController（带有 mapView）（我的 viewController 称为 MapViewController 是 TabBarController 的一部分）。
我的 TabBarController 包含在 navigationController 中。
我创建了（通过委托方法 MKMapViewDelegate）添加到地图的 annotationView。我允许标注显示标题和副标题。标题和副标题取自对我的数据库进行的查询。从这些查询中，我得到标题、详细信息、ID（字符串版本）和图像。
我在每个注释的标注中设置标题和副标题没有问题。
但是当我将每个标注的图像设置为 LeftCalloutAccessoryView 时，系统会为我提供所有相同的图像。
而且，当我点击 RightCalloutAccessoryView（这是一个推送到另一个 viewController 的按钮）时，它应该作为新窗口导航控制器打开（所以推送），给我错误的 ID（另一个注释的 ID），因此是新窗口中的详细信息错误。
我知道这可能会解释它，所以有点难以理解，但这里是代码：
+ (CGFloat)annotationPadding;
{
return 10.0f;
}
+ (CGFloat)calloutHeight;
{
return 40.0f;
}
- (void)viewDidLoad
{
[super viewDidLoad];
[_mapView setDelegate:self];
_arrPosters = [[NSMutableArray alloc] init];
_script = [[DBGMScr alloc] init]; //Is a class that provides script database connection
//With fieldsRequest I get the array with the field results sought
_arrID = [[NSMutableArray alloc] initWithArray:[_script fieldsRequest:@"SELECT ID FROM Event ORDER BY DateTime DESC"]];
_arrEventNames = [[NSMutableArray alloc] initWithArray:[_script fieldsRequest:@"SELECT Name FROM Event ORDER BY DateTime DESC"]];
_arrEventLatitude = [[NSMutableArray alloc] initWithArray:[_script fieldsRequest:@"SELECT Latitude FROM Event ORDER BY DateTime DESC"]];
_arrEventLongitude = [[NSMutableArray alloc] initWithArray:[_script fieldsRequest:@"SELECT Longitude FROM Event ORDER BY DateTime DESC"]];
_arrEventDescription = [[NSMutableArray alloc] initWithArray:[_script fieldsRequest:@"SELECT Description FROM Event ORDER BY DateTime DESC"]];
for (int i = 0; i < [_arrID count]; i++) {
//With getPoster I get the poster for the event (located on the server) by using a script (it works perfectly), and add it to the array of posters
UIImage *poster = [_script getPoster:_arrID[i]];
[_arrPosters insertObject:poster atIndex:i];
}
for (int i = 0; i < [_arrID count]; i++) {
MKPointAnnotation *aAnnotationPoint = [[MKPointAnnotation alloc] init];
CLLocationCoordinate2D theCoordinate;
theCoordinate.latitude = [_arrEventLatitude[i] doubleValue];
theCoordinate.longitude = [_arrEventLongitude[i] doubleValue];
aAnnotationPoint.coordinate = theCoordinate;
aAnnotationPoint.title = _arrEventNames[i];
aAnnotationPoint.subtitle = _arrEventDescription[i];
// Add the annotationPoint to the map
[_mapView addAnnotation:aAnnotationPoint];
}
}
#pragma mark - MKMapViewDelegate
-(MKAnnotationView*)mapView:(MKMapView*)mapView viewForAnnotation:(id<MKAnnotation>)annotation {
CGRect myRect = CGRectMake(-20, -20, 40, 40);
EventAnnotationView *viewAnno = [[EventAnnotationView alloc] initWithFrame:myRect];
viewAnno.canShowCallout = YES;
UIButton* rightButton = [UIButton buttonWithType:
UIButtonTypeDetailDisclosure];
viewAnno.rightCalloutAccessoryView = rightButton;
UIImageView *iconView = [[UIImageView alloc] initWithFrame:myRect];
iconView.image = defaultImage; //defaultImage for now, but I want to show a different image for each annotation
viewAnno.leftCalloutAccessoryView = iconView;
NSString *viewTitle = [viewAnno.annotation title];
return viewAnno;
}
- (void)mapView:(MKMapView *)mapView annotationView:(MKAnnotationView *)view calloutAccessoryControlTapped:(UIControl *)control
{
EventViewerViewController *controller = [self.storyboard instantiateViewControllerWithIdentifier:@"EventViewer"];
[self.navigationController pushViewController:controller animated:YES];
NSDictionary *selection = @{@"ID" : _arrID[_eventIndex] //but it get an incorrect ID,
@"eventName" : _arrEventNames[_eventIndex]};
[controller setValue:selection forKey:@"selection"];
}
-(void)mapView:(MKMapView *)mapView didSelectAnnotationView:(MKAnnotationView *)view
{
//_eventIndex is an NSInteger declared in file .h
_eventIndex = [_mapView.annotations indexOfObject:view.annotation];
}
EventAnnotationView 是 MKAnnotationView 的子类：
- (id)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self) {
// make sure the x and y of the CGRect are half it's
// width and height, so the callout shows when user clicks
// in the middle of the image
CGRect viewRect = CGRectMake(-20, -20, 40, 40);
UIImageView* imageView = [[UIImageView alloc] initWithFrame:viewRect];
// keeps the image dimensions correct
// so if you have a rectangle image, it will show up as a rectangle,
// instead of being resized into a square
imageView.contentMode = UIViewContentModeScaleAspectFit;
_imageView = imageView;
[self addSubview:imageView];
}
return self;
}
- (void)setImage:(UIImage *)image
{
// when an image is set for the annotation view,
// it actually adds the image to the image view
_imageView.image = image;
}