MapKit mapView：viewForAnnotation對引腳顏色沒有影響

Question

我似乎無法改變引腳顏色。

我有我的視圖控制器延伸<MKMapViewDelegate>和執行mapView:viewForAnnotation我很近，但必須缺少的東西。任何幫助，將不勝感激。

MainViewController.h

#import <UIKit/UIKit.h> 
#import <MapKit/MapKit.h> 
#import "StopAnnotation.h" 

#define METERS_PER_MILE 1609.344 

@interface MainViewController : UIViewController <MKMapViewDelegate> { 

} 
@property (weak, nonatomic) IBOutlet MKMapView *mapView; 

@end 

MapViewController.m

#import "MainViewController.h" 

@implementation MainViewController 
@synthesize mapView=_mapView; 

- (void)viewWillAppear:(BOOL)animated 
{ 
    CLLocationCoordinate2D zoomLocation; 
    zoomLocation.latitude = 43.066667; 
    zoomLocation.longitude = -89.4; 

    MKCoordinateRegion viewRegion = MKCoordinateRegionMakeWithDistance(zoomLocation, METERS_PER_MILE, METERS_PER_MILE); 

    MKCoordinateRegion adjustRegion = [_mapView regionThatFits:viewRegion]; 

    [_mapView setRegion:adjustRegion animated:YES]; 
    [_mapView addAnnotation:[[StopAnnotation alloc] initWithCoordinate:zoomLocation]]; 
} 

- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id<MKAnnotation>)annotation { 
    MKPinAnnotationView *pav = [[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:nil]; 
    pav.pinColor = MKPinAnnotationColorPurple; 
    return pav; 
} 

// the rest of the methods are default, i.e. viewDid* and shouldAutorotate*, etc... 

StopAnnotation.h

#import <Foundation/Foundation.h> 
#import <MapKit/MapKit.h> 

@interface StopAnnotation : NSObject <MKAnnotation> { 
    CLLocationCoordinate2D coordinate; 
    NSString *title; 
    NSString *subtitle; 
} 
- (id)initWithCoordinate:(CLLocationCoordinate2D)c; 
@end 

StopAnnotation.m

#import "StopAnnotation.h" 

@implementation StopAnnotation 
@synthesize coordinate; 

- (NSString *)subtitle { 
    return @"subtitle"; 
} 

- (NSString *)title { 
    return @"title"; 
} 

- (id)initWithCoordinate:(CLLocationCoordinate2D)c { 
    coordinate = c; 
    NSLog(@"%f,%f", c.latitude, c.longitude); 
    return self; 
} 

@end 

我在做練習&代碼主要是從here

謝謝！

Answer 1

您必須設置MainViewController爲MapView類的代表，也就是說，如果你不是那麼的地圖視圖可能會生成默認引腳，如果你把在

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

斷點它實際上被調用？