我正在尝试编写一些单元测试(使用xctest)来验证我的Google Maps mapView是否以我的“当前位置”为中心.
- (void) testMapCentersOnMyLocation {
WtHomeController *controller = [[WtHomeController alloc] init];
[controller viewDidLoad];
//Simulator's location is stubbed to be in San Francisco,at this lat/lon
CLLocationDegrees expectedLatitude = 37.787359f;
CLLocationDegrees expectedLongitude = -122.408227f;
// FIXME this loop runs forever - location isn't being updated in simulator.
while(controller.firstLocationUpdate == NO) {
NSLog(@"Waiting on location...");
NSLog(@"my location is: %f,%f",controller.mapView.myLocation.coordinate.latitude,controller.mapView.myLocation.coordinate.longitude);
}
CLLocationCoordinate2D mapCenter = [controller.mapView.camera target];
XCTAssertEqualWithAccuracy(mapCenter.latitude,expectedLatitude,0.00001f);
XCTAssertEqualWithAccuracy(mapCenter.longitude,expectedLongitude,0.00001f);
}
以下是分配mapView的控制器的相关方法
@interface WtHomeController ()
@property(nonatomic,strong) GMSMapView *mapView;
@property(nonatomic) BOOL firstLocationUpdate;
@end
@implementation WtHomeController
- (void)viewDidLoad {
[super viewDidLoad];
//Initialize map pane on Los Angeles lat/lon
CLLocationDegrees latitude = WtLosAngelesLatitude;
CLLocationDegrees longitude = WtLosAngelesLongitude;
GMSCameraPosition *camera = [GMSCameraPosition cameraWithLatitude:latitude
longitude:longitude
zoom:6];
self.mapView = [GMSMapView mapWithFrame:CGRectZero camera:camera];
self.mapView.myLocationEnabled = YES;
// Listen to the myLocation property of GMSMapView.
[self.mapView addObserver:self
forKeyPath:@"myLocation"
options:NSKeyValueObservingOptionNew
context:NULL];
self.view = self.mapView;
}
- (void)dealloc {
[self.mapView removeObserver:self
forKeyPath:@"myLocation"
context:NULL];
}
#pragma mark - KVO updates
- (void)observeValueForKeyPath:(NSString *)keyPath
ofObject:(id)object
change:(NSDictionary *)change
context:(void *)context {
DDLogDebug(@"my location is: %f,self.mapView.myLocation.coordinate.latitude,self.mapView.myLocation.coordinate.longitude);
if( [keyPath isEqualToString:@"myLocation"] ) {
if (!self.firstLocationUpdate) {
// If the first location update has not yet been recieved,then jump to that
// location.
self.firstLocationUpdate = YES;
CLLocation *location = [change objectForKey:NSKeyValueChangeNewKey];
self.mapView.camera = [GMSCameraPosition cameraWithTarget:location.coordinate
zoom:14];
}
}
}
以下是我到目前为止所得到的：通过编辑Xcode中的方案首选项,我可以在构建应用程序时模拟位置.
然后,当我从xcode构建应用程序时,我可以在模拟器中看到我的位置已更新为“旧金山”.这是我在模拟器上构建和运行时日志的输出：
2014-04-02 17:28:09.253 DEBUG WtHomeController: observeValueForKeyPath:ofObject:change:context: 109 - my location is: 37.787359,-122.408227
凉.但是在运行单元测试时,我的位置永远不会更新.
测试日志的输出是：
2014-04-02 17:02:41.919 wetap[71081:60b] Waiting on location... 2014-04-02 17:02:41.919 wetap[71081:60b] my location is: 0.000000,0.000000 2014-04-02 17:02:41.919 wetap[71081:60b] Waiting on location... 2014-04-02 17:02:41.920 wetap[71081:60b] my location is: 0.000000,0.000000 2014-04-02 17:02:41.920 wetap[71081:60b] Waiting on location... 2014-04-02 17:02:41.921 wetap[71081:60b] my location is: 0.000000,0.000000 2014-04-02 17:02:41.921 wetap[71081:60b] Waiting on location... 2014-04-02 17:02:41.921 wetap[71081:60b] my location is: 0.000000,0.000000 ...to infinity
如何模拟单元测试的位置？
根据@ Paulw11的建议编辑我的测试：
WtAppDelegate *appdelegate = (WtAppDelegate *)[UIApplication sharedApplication].delegate;
CLLocationManager *locationManager = appdelegate.locationManager;
[locationManager startUpdatingLocation];
while(controller.firstLocationUpdate == NO) {
NSLog(@"Waiting on location...");
NSLog(@"my location is: %f,controller.mapView.myLocation.coordinate.longitude);
NSLog(@"Location manager think's we're at: %@",[locationManager location]);
}
并且运行该测试的新日志输出：
2014-04-02 18:08:56.394 wetap[73922:60b] Location manager think's we're at: (null) 2014-04-02 18:08:56.394 wetap[73922:60b] Waiting on location... 2014-04-02 18:08:56.394 wetap[73922:60b] my location is: 0.000000,0.000000 2014-04-02 18:08:56.395 wetap[73922:60b] Location manager think's we're at: (null) 2014-04-02 18:08:56.396 wetap[73922:60b] Waiting on location... 2014-04-02 18:08:56.396 wetap[73922:60b] my location is: 0.000000,0.000000 2014-04-02 18:08:56.397 wetap[73922:60b] Location manager think's we're at: (null)
解决方法
Google地图视图只是一个视图,它不会自动连接到iOS中的位置跟踪并自行更新.您需要分配CLLocationManager并使用它的委托方法跟踪您的位置.然后,您可以在此答案中更新myLocation属性 –
GMSMapView myLocation not giving actual location
我认为您没有为CLLocationManager设置委托方法 – 它是将位置传输到Google Map View的didUpdateLocations委托方法
在viewDidLoad中
self.locationManager = [[CLLocationManager alloc]init]; self.locationManager.delegate=self; [self.locationManager startUpdatingLocation];
实现委托方法(请注意,上一个答案中引用的方法,didUpdateLocation已被弃用并替换为didUpdateLocations方法
- (void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations
{
CLLocation *latestLocation=(CLLocation *)[locations lastObject];
[self.mapView animateToLocation:latestLocation.coordinate] <== this is the important bit - it transfers the location from CLLocationManager to the GM view
}
