iOS 根据经纬度翻译成详细位置的各种方法
首先苹果获取经纬度是
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if ([CLLocationManager locationServicesEnabled]) {//判断手机是否可以定位
locationManager = [[CLLocationManager alloc] init];//初始化位置管理器
[locationManager setDelegate:self];
[locationManager setDesiredAccuracy:kCLLocationAccuracyBest];//设置精度
locationManager.distanceFilter = 1000.0f;//设置距离筛选器
[locationManager startUpdatingLocation];//启动位置管理器
}
然后根据其代理获取经纬度
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#pragma mark - CLLocationManager Delegate Methods
- (void)locationManager:(CLLocationManager *)manager
didUpdateToLocation:(CLLocation *)newLocation
fromLocation:(CLLocation *)oldLocation;
{
location=[newLocation coordinate];//当前经纬度
lat=location.latitude;
lon=location.longitude;
MKCoordinateSpan theSpan;
theSpan.latitudeDelta=0.01f;
theSpan.longitudeDelta=0.01f;
theRegion.center=location;//定义地图显示范围
theRegion.span=theSpan;
}
根据经纬度解析成位置目前有2种。第一个是调用系统的CLGeocoder类的 reverseGeocodeLocation方法
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//根据经纬度解析成位置
CLGeocoder *geocoder=[[[CLGeocoder alloc]init]autorelease];
[geocoder reverseGeocodeLocation:location completionHandler:^(NSArray *placemark,NSError *error)
{
CLPlacemark *mark=[placemark objectAtIndex:0];
place.title=@"没有当前位置的详细信息";
place.subTitle=@"详细信息请点击‘附近’查看";
place.title=[NSString stringWithFormat:@"%@%@%@",mark.subLocality,mark.thoroughfare,mark.subThoroughfare];
place.subTitle=[NSString stringWithFormat:@"%@",mark.name];//获取subtitle的信息
[self.myMapView selectAnnotation:place animated:YES];
} ];
第二种是调用google的api
----http://maps.googleapis.com/maps/api/geocode/json?latlng=%f,%f&sensor=true
网上有人说系统的方法有时候解析不出来位置。第二种google,国内有时候访问不了google服务器,所以都有缺点。
有人建议国内的地图可以使用高德地图(以后摸索下)
PS1:网上有一个比较流行的查找附近功能,是根据google的api搜索的
#define SEARCH_GOOGLE @"https://maps.googleapis.com/maps/api/place/search/json?location=%f,%f&radius=1000&types=%@&sensor=true&key=AIzaSyALaqx0MfPsp2aldbZbzEQAq64SwgQfZ0c"
调用的话就是这样
jsonString = [NSString stringWithFormat:SEARCH_GOOGLE,location.coordinate.latitude,location.coordinate.longitude,@"food"];
jsonString = [NSString stringWithFormat:SEARCH_GOOGLE,location.coordinate.latitude,location.coordinate.longitude,@"bus_station"];
jsonString = [NSString stringWithFormat:SEARCH_GOOGLE,location.coordinate.latitude,location.coordinate.longitude,@"hospital"];
PS2:有个功能,如果长时间按住地图上某个地方,如何获取其经纬度,进而对其显示位置呢?
----
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//开始点击长按,不然会执行2次。
if (sender.state==UIGestureRecognizerStateBegan) {
//isLongPress=YES;
CGPoint touchPoint=[sender locationInView:self.myMapView];
CLLocationCoordinate2D touchCoordinate=[self.myMapView convertPoint:touchPoint toCoordinateFromView:self.myMapView];//将触摸点转换经纬度
//反向解析长按时的大头针的信息
location =[[CLLocation alloc]initWithLatitude:touchCoordinate.latitude longitude:touchCoordinate.longitude];
补充:移动开发 , IOS ,