How to display 2 lines of text for subtitle of MKAnnotation and change the image for the button on the right?
- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>)annotation
{
MKAnnotationView *annotationView = [[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:@"loc"];
// Button
UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
button.frame = CGRectMake(0, 0, 23, 23);
button.contentVerticalAlignment = UIControlContentVerticalAlignmentCenter;
button.contentHorizontalAlignment = UIControlContentHorizontalAlignmentCenter;
[button setImage:[UIImage imageNamed:yourImageName] forState:UIControlStateNormal];
[advertButton addTarget:self action:@selector(buttonPress:) forControlEvents:UIControlEventTouchUpInside];
annView.rightCalloutAccessoryView = button;
// Image and two labels
UIView *leftCAV = [[UIView alloc] initWithFrame:CGRectMake(0,0,23,23)];
[leftCAV addSubview : yourImageView];
[leftCAV addSubview : yourFirstLabel];
[leftCAV addSubview : yourSecondLabel];
annotationView.leftCalloutAccessoryView = leftCAV;
annotationView.canShowCallout = YES;
return pin;
}
UPDATE
The default style for annotations only supports the title and subtitle. Neither title nor subtitle can include line breaks. You cannot do this without subclassing.
To use a custom view review Apple's sample code:
http://developer.apple.com/library/ios/#samplecode/WeatherMap/Introduction/Intro.html
I also think there is a problem in your code
UILabel *l1=[[UILabel alloc] init];
l1.frame=CGRectMake(0, 15, 50, 50);
l1.text=@"First line of subtitle";
l1.font=[UIFont fontWithName:@"Arial Rounded MT Bold" size:(10.0)];
UILabel *l2=[[UILabel alloc] init];
l2.frame=CGRectMake(0, 30, 50, 50);
l2.text=@"Second line of subtitle";
l2.font=[UIFont fontWithName:@"Arial Rounded MT Bold" size:(10.0)];
[leftCAV addSubview : l1];
[leftCAV addSubview : l2];
l1 has a frame (0, 15, 50, 50) and l2 has (0, 30, 50, 50). Wont these two overlap? I mean l1 will start from y=15 and its height is 50. so when l2 starts from 30 it may overlap.. Can you pls check by changing the frames
how to show multiple lines in MKAnnotation with autolayout?
we can show multiple line in MKAnnotation view With the help of auto layout
it's very simple.
in objective c
- (MKAnnotationView *) mapView:(MKMapView *)mapView viewForAnnotation:(id<MKAnnotation>)annotation {
if ([annotation isKindOfClass:[MKUserLocation class]])
return nil;
if ([annotation isKindOfClass:[CustomAnnotation class]]) {
CustomAnnotation *customAnnotation = (CustomAnnotation *) annotation;
MKAnnotationView *annotationView = [mapView dequeueReusableAnnotationViewWithIdentifier:@"CustomAnnotation"];
if (annotationView == nil)
annotationView = customAnnotation.annotationView;
else
annotationView.annotation = annotation;
//Adding multiline subtitle code
UILabel *subTitlelbl = [[UILabel alloc]init];
subTitlelbl.text = @"sri ganganagar this is my home twon.sri ganganagar this is my home twon.sri ganganagar this is my home twon. ";
annotationView.detailCalloutAccessoryView = subTitlelbl;
NSLayoutConstraint *width = [NSLayoutConstraint constraintWithItem:subTitlelbl attribute:NSLayoutAttributeWidth relatedBy:NSLayoutRelationLessThanOrEqual toItem:nil attribute:NSLayoutAttributeNotAnAttribute multiplier:1 constant:150];
NSLayoutConstraint *height = [NSLayoutConstraint constraintWithItem:subTitlelbl attribute:NSLayoutAttributeHeight relatedBy:NSLayoutRelationGreaterThanOrEqual toItem:nil attribute:NSLayoutAttributeNotAnAttribute multiplier:1 constant:0];
[subTitlelbl setNumberOfLines:0];
[subTitlelbl addConstraint:width];
[subTitlelbl addConstraint:height];
return annotationView;
} else
return nil;
}
output
For Swift
func mapView(mapView: MKMapView, viewForAnnotation annotation: MKAnnotation) -> MKAnnotationView? {
let identifier = "MyPin"
if annotation.isKindOfClass(MKUserLocation) {
return nil
}
var annotationView: MKPinAnnotationView? = mapView.dequeueReusableAnnotationViewWithIdentifier(identifier) as? MKPinAnnotationView
if annotationView == nil {
annotationView = MKPinAnnotationView(annotation: annotation, reuseIdentifier: identifier)
annotationView?.canShowCallout = true
let label1 = UILabel(frame: CGRectMake(0, 0, 200, 21))
label1.text = "Some text1 some text2 some text2 some text2 some text2 some text2 some text2"
label1.numberOfLines = 0
annotationView!.detailCalloutAccessoryView = label1;
let width = NSLayoutConstraint(item: label1, attribute: NSLayoutAttribute.Width, relatedBy: NSLayoutRelation.LessThanOrEqual, toItem: nil, attribute: NSLayoutAttribute.NotAnAttribute, multiplier: 1, constant: 200)
label1.addConstraint(width)
let height = NSLayoutConstraint(item: label1, attribute: NSLayoutAttribute.Height, relatedBy: NSLayoutRelation.Equal, toItem: nil, attribute: NSLayoutAttribute.NotAnAttribute, multiplier: 1, constant: 90)
label1.addConstraint(height)
} else {
annotationView!.annotation = annotation
}
return annotationView
}
}
here i use NSLayoutConstraint
i programatically create a label. add the constraint on it and then add the label in detailCalloutAccessoryView of MKAnnotationView.
Longer subtitles in MapView annotations (swift)
I figured it out, I added a label in viewForAnnotation and it just worked
¯\_(ツ)_/¯
func mapView(mapView: MKMapView, viewForAnnotation annotation: MKAnnotation) -> MKAnnotationView? {
if annotation is MKUserLocation {
//return nil so map view draws "blue dot" for standard user location
return nil
}
let reuseId = "pin"
var pinView = mapView.dequeueReusableAnnotationViewWithIdentifier(reuseId) as? MKPinAnnotationView
if pinView == nil {
pinView = MKPinAnnotationView(annotation: annotation, reuseIdentifier: reuseId)
pinView!.canShowCallout = true
}
else {
pinView!.annotation = annotation
}
//THIS IS THE GOOD BIT
let subtitleView = UILabel()
subtitleView.font = subtitleView.font.fontWithSize(12)
subtitleView.numberOfLines = 0
subtitleView.text = annotation.subtitle!
pinView!.detailCalloutAccessoryView = subtitleView
return pinView
}
Add a image to MKPointAnnotation
You'll need to set up an MKMapViewDelegate, and implement
- (MKAnnotationView *)mapView:(MKMapView *)theMapView viewForAnnotation:(id <MKAnnotation>)annotation
Here's sample code, stolen from the MapCallouts sample code provided on Apple's developer site. I've modified it to focus on the important details. You can see below that the key is to set the image on an annotation view, and return that annotation view from this method.
- (MKAnnotationView *)mapView:(MKMapView *)theMapView viewForAnnotation:(id <MKAnnotation>)annotation
{
static NSString *SFAnnotationIdentifier = @"SFAnnotationIdentifier";
MKPinAnnotationView *pinView =
(MKPinAnnotationView *)[mapView dequeueReusableAnnotationViewWithIdentifier:SFAnnotationIdentifier];
if (!pinView)
{
MKAnnotationView *annotationView = [[[MKAnnotationView alloc] initWithAnnotation:annotation
reuseIdentifier:SFAnnotationIdentifier] autorelease];
UIImage *flagImage = [UIImage imageNamed:@"flag.png"];
// You may need to resize the image here.
annotationView.image = flagImage;
return annotationView;
}
else
{
pinView.annotation = annotation;
}
return pinView;
}
We use dequeueReusableAnnotationViewWithIdentifier to grab an already created view to make reuse of our annotation views. If one isn't returned we create a new one. This prevents us from creating hundreds of MKAnnotationViews if only a few are ever in sight at the same time.
Related Topics
Swift Function Compiler Error 'Missing Return'
Stopping Timer at Defined Amount of Time in Swift
How to Unpack Multiple Levels of Nested JSON in Firebase Database
How to Make a Function with a Loop Asynchronous in Swift
How to Get All Characters of the Font with Ctfontcopycharacterset() in Swift
How to Notify a Queue in Swift (Gcd)
Toggle Selectedrange Attributes in Uitextview
Error on Adding Uinavigationbar Button with Image
How Assistant Model Works in Swift
How to Convert Unix Timestamp into Swift Nsdate Object
Datefromstring() Returns Incorrect Date
Declaring Conformance to @Objc Protocol in Empty Extension Breaks with Exc_Bad_Instruction
Swift: Nil Error When Using Self.Moc.Save() to Save in Core Data
When Two Optionals Are Assigned to an If Let Statement, Which One Gets Unwrapped? Swift Language
Presenting a Uiviewcontroller from Skscene Shows Black Screen
Swiftui: Problem with Adding a Property to Data Struct