EDITED: MapKit Annotation callouts. Adjust size of the UIPopoverController - xcode

Question

Sorry, I have read a bunch of tutorials how to create a custom Callout for MapKit Annotation. It works with NSLog, but I cannot display the information in the Callouts.
I have two type of icons on the map. This is my viewForAnnotation method:
-(MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id<MKAnnotation>)annotation {
if (! [annotation isKindOfClass:[IGAMapAnnotation class]]) {
return nil;
}
IGAMapAnnotation *myLocation = (IGAMapAnnotation *) annotation;
self.typeIsFix = [myLocation.navaidType isEqualToString:#"FIX"];
self.typeIsPort = [myLocation.navaidType isEqualToString:#"PORT"];
int planeImageViewTag = 42;
NSString *reuseId;
if (self.typeIsPort)
reuseId = #"IGAMapAnnotationPort";
else if (self.typeIsFix)
reuseId = #"IGAMapAnnotationFix";
else
reuseId = #"IGAMapAnnotationOther";
MKAnnotationView *annotationView = [mapView dequeueReusableAnnotationViewWithIdentifier:reuseId];
if (annotationView == nil)
{
annotationView = [[MKAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:reuseId];
annotationView.enabled = YES;
UIButton *annotationInfo = [UIButton buttonWithType:UIButtonTypeDetailDisclosure];
annotationView.rightCalloutAccessoryView = annotationInfo;
annotationView.canShowCallout = YES;
if (self.typeIsPort)
{
annotationView.image = [UIImage imageNamed:#"mapPORT.png"];
annotationView.centerOffset = CGPointMake(0, 0);
}
else if (self.typeIsFix)
{
annotationView.image = [UIImage imageNamed:#"mapFIX.png"];
annotationView.centerOffset = CGPointMake(0, 0);
}
else
return nil;
}
else
{
annotationView.annotation = annotation;
}
return annotationView;
}
Then I have a calloutAccessoryControlTapped method
- (void)mapView:(MKMapView *)mapview annotationView:(MKAnnotationView *)view calloutAccessoryControlTapped:(UIControl *)control
{
IGAAnnotationInfoViewController *popOverCallout = [[IGAAnnotationInfoViewController alloc]init];
UIPopoverController *popOver = [[UIPopoverController alloc] initWithContentViewController:popOverCallout];
popOver.popoverContentSize = CGSizeMake(300, 200);
[popOver presentPopoverFromRect:view.bounds
inView:view
permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES];
}
I have also created a UIViewController which I assigned to UIPopoverController.
Now, when I tap the button on my annotation I see a white space for text. Great. If I assign text to a label in UIViewController, it also works great (the following is my UIViewController.m):
- (void)viewDidLoad {
[super viewDidLoad];
txtCallout = [[UILabel alloc] initWithFrame:CGRectMake(0.0, 0.0, 300, 200) ];
txtCallout.font = [UIFont fontWithName:#"Arial Rounded MT Bold" size:(14.0)];
txtCallout.numberOfLines = 0;
txtCallout.clipsToBounds = YES;
txtCallout.backgroundColor = [UIColor clearColor];
txtCallout.textColor = [UIColor blackColor];
txtCallout.textAlignment = NSTextAlignmentLeft;
txtCallout.text = #"text\ntext\ntext";
[self.view addSubview:txtCallout];
}
But how do I insert the text from my annotation method? Also the text must be different depending on the icon type, say #"PORT, PORT" or #"FIX,FIX". How do I do it?
EDIT:
I have managed to display callouts with the necessary information passed. My last problem is that sometimes my callout is 3 lines, sometimes -- as many as 15. How is it possible to make the callout adjust automatically to the number of lines in my string? Should I modify my popoverContentSize or my label size in the UIViewController?
Thank you so much!

Answer 1

I have figured out how to adjust the MK Annotation callout to a UILabel.
Implement the calloutAccessoryControlTapped method
- (void)mapView:(MKMapView *)mapview annotationView:(MKAnnotationView *)view calloutAccessoryControlTapped:(UIControl *)control
{
// OPTIONAL: Deselecting Annotation View when Callout is tapped
//[mapview deselectAnnotation:view.annotation animated:YES];
NSString *calloutDetails;
IGAMapAnnotation *annotationTapped = (IGAMapAnnotation *)view.annotation;
calloutDetails = [NSString stringWithFormat:#"YOUR TEXT:\nYOURTEXT\n"];
// Declare and initialize the UIViewController that has the label to contain the callout information
IGAAnnotationInfoViewController *detailViewController = [[IGAAnnotationInfoViewController alloc]initWithText:calloutDetails];
UIPopoverController *popOver = [[UIPopoverController alloc] initWithContentViewController:detailViewController];
// Size of the UIPopoverController = size of the label + 40 pts
popOver.popoverContentSize = CGSizeMake(detailViewController.txtCallout.frame.size.width+40,detailViewController.txtCallout.frame.size.height+40);
// Show popover controller
[popOver presentPopoverFromRect:view.bounds
inView:view
permittedArrowDirections:UIPopoverArrowDirectionAny
animated:YES];
}
Now, IGAAnnotationInfoViewController.h
#interface IGAAnnotationInfoViewController : UIViewController {
CGRect calloutSize;
}
#property (strong,nonatomic) NSString *calloutInformation;
#property (strong,nonatomic) IGACalloutLabel *txtCallout;
-(IGAAnnotationInfoViewController*) initWithText : (NSString*) calloutText;
IGAAnnotationInfoViewController.m
#implementation IGAAnnotationInfoViewController
#synthesize calloutInformation,txtCallout;
-(IGAAnnotationInfoViewController*) initWithText : (NSString*) calloutText {
self = [super init];
if ( self ) {
calloutInformation = calloutText;
// Creating a label that will display the callout information (passed from IGAAcarasViewController - Map Annotation)
txtCallout = [[IGACalloutLabel alloc] initWithFrame:CGRectMake(20, 20, 0, 0)];
txtCallout.lineBreakMode = NSLineBreakByWordWrapping;
txtCallout.numberOfLines=0;
txtCallout.backgroundColor = [UIColor clearColor];
txtCallout.textColor=[UIColor blueColor];
txtCallout.text = calloutInformation;
[txtCallout drawTextInRect:CGRectMake(10,10,0,0)];
[txtCallout sizeToFit];
[self.view addSubview:txtCallout];
}
return self;
}
Finally, subclass the UILabel class:
implementation IGACalloutLabel
#synthesize topInset, leftInset, bottomInset, rightInset;
- (void)drawTextInRect:(CGRect)rect
{
UIEdgeInsets insets = {topInset,leftInset,bottomInset,rightInset};
return [super drawTextInRect:UIEdgeInsetsInsetRect(rect, insets)];
}
Regards,