我想从MapKit for iPhone中的坐标值中获取位置名称
我想从坐标值中获取位置名称。这是代码我想从MapKit for iPhone中的坐标值中获取位置名称,iphone,xcode,ios5,mapkit,Iphone,Xcode,Ios5,Mapkit,我想从坐标值中获取位置名称。这是代码 - (void)viewWillAppear:(BOOL)animated { CLLocationCoordinate2D zoomLocation; zoomLocation.latitude = 39.281516; zoomLocation.longitude= -76.580806; MKCoordinateRegion viewRegion = MKCoordinateRegionMakeWithDistanc
- (void)viewWillAppear:(BOOL)animated {
CLLocationCoordinate2D zoomLocation;
zoomLocation.latitude = 39.281516;
zoomLocation.longitude= -76.580806;
MKCoordinateRegion viewRegion = MKCoordinateRegionMakeWithDistance(zoomLocation, 0.5*METERS_PER_MILE, 0.5*METERS_PER_MILE);
MKCoordinateRegion adjustedRegion = [_mapView regionThatFits:viewRegion];
[_mapView setRegion:adjustedRegion animated:YES];
}
所以,从那个纬度和经度,我想知道那个位置的名称。在iOS 5.0和更高版本中,您可以使用核心位置框架的
CLGeocoder
,对于低于5.0的iOS,可以使用Map Kit框架的MKReverseGeocoder
。祝你好运 使用这种方法
CLGeocoder *geocoder = [[CLGeocoder alloc] init];
[geocoder reverseGeocodeLocation: zoomLocation completionHandler:^(NSArray* placemarks, NSError* error){
}
];
以下代码应适用于ios5及以上版本
CLGeocoder *ceo = [[CLGeocoder alloc]init];
CLLocation *loc = [[CLLocation alloc]initWithLatitude:32.00 longitude:21.322]; //insert your coordinates
[ceo reverseGeocodeLocation:loc
completionHandler:^(NSArray *placemarks, NSError *error) {
CLPlacemark *placemark = [placemarks objectAtIndex:0];
if (placemark) {
NSLog(@"placemark %@",placemark);
//String to hold address
NSString *locatedAt = [[placemark.addressDictionary valueForKey:@"FormattedAddressLines"] componentsJoinedByString:@", "];
NSLog(@"addressDictionary %@", placemark.addressDictionary);
NSLog(@"placemark %@",placemark.region);
NSLog(@"placemark %@",placemark.country); // Give Country Name
NSLog(@"placemark %@",placemark.locality); // Extract the city name
NSLog(@"location %@",placemark.name);
NSLog(@"location %@",placemark.ocean);
NSLog(@"location %@",placemark.postalCode);
NSLog(@"location %@",placemark.subLocality);
NSLog(@"location %@",placemark.location);
//Print the location to console
NSLog(@"I am currently at %@",locatedAt);
}
else {
NSLog(@"Could not locate");
}
}
];
这里是从当前位置获取地址字符串的块
in .h file
typedef void(^addressCompletionBlock)(NSString *);
-(void)getAddressFromLocation:(CLLocation *)location complationBlock:(addressCompletionBlock)completionBlock;
in .m file
#pragma mark - Get Address
-(void)getAddressFromLocation:(CLLocation *)location complationBlock:(addressCompletionBlock)completionBlock
{
//Example URL
//NSString *urlString = @"http://maps.googleapis.com/maps/api/geocode/json?latlng=23.033915,72.524267&sensor=true_or_false";
NSString *urlString = [NSString stringWithFormat:@"http://maps.googleapis.com/maps/api/geocode/json?latlng=%f,%f&sensor=true_or_false",location.coordinate.latitude, location.coordinate.longitude];
NSError* error;
NSString *locationString = [NSString stringWithContentsOfURL:[NSURL URLWithString:urlString] encoding:NSASCIIStringEncoding error:&error];
NSArray *jsonObject = [NSJSONSerialization JSONObjectWithData:[locationString dataUsingEncoding:NSUTF8StringEncoding]
options:0 error:NULL];
NSString *strFormatedAddress = [[[jsonObject valueForKey:@"results"] objectAtIndex:0] valueForKey:@"formatted_address"];
completionBlock(strFormatedAddress);
}
CLLocation* currentLocation = [[CLLocation alloc] initWithLatitude:[SharedObj.current_Lat floatValue] longitude:[SharedObj.current_Long floatValue]];
[self getAddressFromLocation:currentLocation complationBlock:^(NSString * address) {
if(address) {
NSLog(@"Address:: %@",address);
}
}];
和调用函数
in .h file
typedef void(^addressCompletionBlock)(NSString *);
-(void)getAddressFromLocation:(CLLocation *)location complationBlock:(addressCompletionBlock)completionBlock;
in .m file
#pragma mark - Get Address
-(void)getAddressFromLocation:(CLLocation *)location complationBlock:(addressCompletionBlock)completionBlock
{
//Example URL
//NSString *urlString = @"http://maps.googleapis.com/maps/api/geocode/json?latlng=23.033915,72.524267&sensor=true_or_false";
NSString *urlString = [NSString stringWithFormat:@"http://maps.googleapis.com/maps/api/geocode/json?latlng=%f,%f&sensor=true_or_false",location.coordinate.latitude, location.coordinate.longitude];
NSError* error;
NSString *locationString = [NSString stringWithContentsOfURL:[NSURL URLWithString:urlString] encoding:NSASCIIStringEncoding error:&error];
NSArray *jsonObject = [NSJSONSerialization JSONObjectWithData:[locationString dataUsingEncoding:NSUTF8StringEncoding]
options:0 error:NULL];
NSString *strFormatedAddress = [[[jsonObject valueForKey:@"results"] objectAtIndex:0] valueForKey:@"formatted_address"];
completionBlock(strFormatedAddress);
}
CLLocation* currentLocation = [[CLLocation alloc] initWithLatitude:[SharedObj.current_Lat floatValue] longitude:[SharedObj.current_Long floatValue]];
[self getAddressFromLocation:currentLocation complationBlock:^(NSString * address) {
if(address) {
NSLog(@"Address:: %@",address);
}
}];
朋友们好,谢谢你们的回答,我很感激,但我得到了这个问题的解决方案,我无法发布答案,因为我没有超过10个的声誉。根据StackOverflow规则,我会在8小时后发布。在通过LAt&Long之后,我刚刚使用GoogleMapAPI获取位置字符串。这是一个很好的答案,尽管它使用GoogleMaps。。。我更喜欢用标准的iOS方式来获取位置。现在这个API不起作用。更多信息请访问这个URL。我认为,这应该是可以接受的答案。谢谢没有if块,else部分怎么能执行?@AppleDelegate先生在我的例子中,reversegeocodleocaiton块未执行您的CLGeocoder实例可能为零。