iOS:针对特定地理位置区域(纬度、经度)向用户发出警报
我试图为用户实现一个iOS:针对特定地理位置区域(纬度、经度)向用户发出警报,ios,geolocation,cllocationmanager,cllocation,clregion,Ios,Geolocation,Cllocationmanager,Cllocation,Clregion,我试图为用户实现一个地理位置功能,我静态设置纬度和经度信息,当应用程序启动时,如果用户在该区域内,我会显示一条消息“您已到达办公室”或者“您正在离开办公室”。我已经实现了下面的代码来实现这一点,我试着通过台阶和车辆四处移动,但在这两种情况下,它总是显示“您已到达办公室”,然而我离那个位置有2公里远!我认为问题在于CLLocationManagerdelegate中的地理数据比较 - (void) startUpdateUserLocation { if(!locationManager)
地理位置
功能,我静态设置纬度
和经度
信息,当应用程序启动时,如果用户在该区域内,我会显示一条消息“您已到达办公室”或者“您正在离开办公室”。我已经实现了下面的代码来实现这一点,我试着通过台阶和车辆四处移动,但在这两种情况下,它总是显示“您已到达办公室”,然而我离那个位置有2公里远!我认为问题在于CLLocationManager
delegate中的地理数据比较
- (void) startUpdateUserLocation
{
if(!locationManager)
locationManager = [[CLLocationManager alloc] init];
locationManager.delegate = self;
locationManager.distanceFilter = kCLDistanceFilterNone;
locationManager.desiredAccuracy = kCLLocationAccuracyBestForNavigation;
// [locationManager startUpdatingLocation];
CLLocationCoordinate2D coord = CLLocationCoordinate2DMake(latitude, longitude);
CLRegion *region = [[CLRegion alloc] initCircularRegionWithCenter:coord radius:kCLDistanceFilterNone identifier:@"identifier"];
[locationManager startMonitoringForRegion:region];
}
- (void)viewDidLoad
{
[super viewDidLoad];
latitude = 23.076289;
longitude = 72.508129;
}
- (void) viewDidAppear:(BOOL)animated
{
[super viewDidAppear:animated];
MKCoordinateRegion region;
region.center = mapView.userLocation.coordinate;
region.span = MKCoordinateSpanMake(0.25, 0.25);
region = [mapView regionThatFits:region];
[mapView setRegion:region animated:YES];
lblCurrentCoords.text = [NSString stringWithFormat:@"lat %f lon %f",mapView.userLocation.coordinate.latitude,mapView.userLocation.coordinate.longitude];
[self startUpdateUserLocation];
}
- (void)locationManager:(CLLocationManager *)manager
didEnterRegion:(CLRegion *)region __OSX_AVAILABLE_STARTING(__MAC_10_7,__IPHONE_4_0)
{
[listOfPoints addObject:manager.location];
[tablePoints reloadData];
/*
* locationManager:didEnterRegion:
*
* Discussion:
* Invoked when the user enters a monitored region. This callback will be invoked for every allocated
* CLLocationManager instance with a non-nil delegate that implements this method.
*/
lblLocationStatus.text = @"You're in office area!...";
}
- (void)locationManager:(CLLocationManager *)manager
didExitRegion:(CLRegion *)region __OSX_AVAILABLE_STARTING(__MAC_10_7,__IPHONE_4_0)
{
/*
* locationManager:didExitRegion:
*
* Discussion:
* Invoked when the user exits a monitored region. This callback will be invoked for every allocated
* CLLocationManager instance with a non-nil delegate that implements this method.
*/
lblLocationStatus.text = @"You're going out from office area!...";
}
- (void)locationManager:(CLLocationManager *)manager
didStartMonitoringForRegion:(CLRegion *)region __OSX_AVAILABLE_STARTING(__MAC_TBD,__IPHONE_5_0)
{
/*
* locationManager:didStartMonitoringForRegion:
*
* Discussion:
* Invoked when a monitoring for a region started successfully.
*/
lblLocationStatus.text = @"Start monitoring...";
}
- (void)locationManager:(CLLocationManager *)manager
monitoringDidFailForRegion:(CLRegion *)region
withError:(NSError *)error __OSX_AVAILABLE_STARTING(__MAC_10_7,__IPHONE_4_0)
{
/*
* locationManager:monitoringDidFailForRegion:withError:
*
* Discussion:
* Invoked when a region monitoring error has occurred. Error types are defined in "CLError.h".
*/
lblLocationStatus.text = @"Stop monitoring...";
}
我正在努力完成以下事情
NSTimer
中调用函数吗我在网上发现了很多问题,所以问的都是同一个问题,但没有人给出匹配的答案!有人请指导我是否朝着正确的方向前进,因为这个代码没有显示出来!:) 听起来你应该改用区域监控,它会告诉你用户何时进入或退出一个圆形区域。使用
CLLocationManagerDelegate
方法进行设置并实施
– locationManager:didEnterRegion:
– locationManager:didExitRegion:
– locationManager:monitoringDidFailForRegion:withError:
– locationManager:didStartMonitoringForRegion:
如果您在接收错误位置数据时遇到问题,请检查
locationManager:didUpdateLocations:
或locationManager:DidUpdateLocation:fromLocation:
中的CLLocation
的年龄。如果超过60秒,不要使用。没问题。正确设置区域监视可能很棘手。查看Xcode中“区域”的示例代码。如果您查看文档查看器,可以通过搜索找到示例代码。快速看一眼,您所做的看起来不错,但是半径:kCLDistanceFilterNone应该使用实际的半径数字,比如100(100米)。