ios - 向 MKUserTrackingBarButtonItem 添加一个 Action

Question

(使用 Xcode 6)

我的跟踪按钮位于导航栏的右侧，它不会触发该方法，我不知道为什么，这应该是正确的方法。

按钮本身是有功能的。

- (void)viewDidLoad
{
    [super viewDidLoad];

    //location initial settings:
    firstLaunch = YES;
    self.mapView.delegate = self;

    [self.mapView setShowsUserLocation:YES];

    locationManager = [[CLLocationManager alloc] init];

    [locationManager setDelegate:self];

    [locationManager setDistanceFilter:kCLDistanceFilterNone];
    [locationManager setDesiredAccuracy:kCLLocationAccuracyBest];
    currentCentre = self.mapView.centerCoordinate;
    //create a thread queue
    [self queryGooglePlaces: currentCentre];

    //navBar:

    MKUserTrackingBarButtonItem *trackButton = [[MKUserTrackingBarButtonItem alloc] initWithMapView:_mapView];
    [trackButton setTarget:self];
    [trackButton setAction:@selector(track:)];

    self.navigationItem.rightBarButtonItem = trackButton;
}

-(void) track: (id) sender {
    NSLog(@"clicked !");
}

Answer 1

我认为您不能以这种方式使用 MKUserTrackingBarButtonItem——它已经有一个目标(关联的 map View )和一个 Action (改变跟踪模式)。相反，我会查看 -[MKMapViewDelegate mapView:didChangeUserTrackingMode:animated:] 以在单击按钮时响应 map 模式更改。