Question

（使用Xcode 6）

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

按钮本身功能正常。

- (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（相关的地图视图）和一个动作（更改跟踪模式）。相反，当单击按钮时，我会调查-[MKMapViewDelegate mapView:didChangeUserTrackingMode:animated:]以响应地图模式更改。

向MKUserTrackingBarButtonItem添加一个Action

1 个答案: