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iOS系统自带定位,用CLLocationManager就可以轻松的实现定位的操作,获得的是一组经纬度,当然,也可以根据给出的经纬度获取相应的省份、城市、街道等信息,下面就看一个根据经纬度获得城市的demo:
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导入框架的步骤:选择1.target——2.Build Phases——3.Link Binary With Libraries ——4.点击“+”号:如图所示步骤:
点击加号之后在搜索框里输入相应的框架,即可搜索到,如图所示:
下面就该写代码了,首先在视图控制器中导入:
#import#import
两个头文件,然后.m中的具体代码如下:
#import "ANNViewController.h" @interface ANNViewController () @property (strong, nonatomic) IBOutlet UILabel *longitude; @property (strong, nonatomic) IBOutlet UILabel *latitude; @property (strong, nonatomic) IBOutlet UILabel *location; @property (strong, nonatomic) CLLocationManager *locationManager; @end @implementation ANNViewController - (void)viewDidLoad { [super viewDidLoad]; // Do any additional setup after loading the view, typically from a nib. self.view.backgroundColor = [UIColor whiteColor]; //创建CLLocationManager对象 self.locationManager = [[CLLocationManager alloc] init]; //设置代理为自己 self.locationManager.delegate = self; } - (IBAction)locationButton:(UIButton *)sender { [self.locationManager startUpdatingLocation]; } - (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation { //将经度显示到label上 self.longitude.text = [NSString stringWithFormat:@"%lf", newLocation.coordinate.longitude]; //将纬度现实到label上 self.latitude.text = [NSString stringWithFormat:@"%lf", newLocation.coordinate.latitude]; // 获取当前所在的城市名 CLGeocoder *geocoder = [[CLGeocoder alloc] init]; //根据经纬度反向地理编译出地址信息 [geocoder reverseGeocodeLocation:newLocation completionHandler:^(NSArray *array, NSError *error) { if (array.count > 0) { CLPlacemark *placemark = [array objectAtIndex:0]; //将获得的所有信息显示到label上 self.location.text = placemark.name; //获取城市 NSString *city = placemark.locality; if (!city) { //四大直辖市的城市信息无法通过locality获得,只能通过获取省份的方法来获得(如果city为空,则可知为直辖市) city = placemark.administrativeArea; } NSLog(@"city = %@", city); } else if (error == nil && [array count] == 0) { NSLog(@"No results were returned."); } else if (error != nil) { NSLog(@"An error occurred = %@", error); } }]; //系统会一直更新数据,直到选择停止更新,因为我们只需要获得一次经纬度即可,所以获取之后就停止更新 [manager stopUpdatingLocation]; }
主要就是直辖市的城市获得需要拐个弯,iOS7添加了一个新的方法,代替了上面这个方法:
- (void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations { NSLog(@"longitude = %f", ((CLLocation *)[locations lastObject]).coordinate.longitude); NSLog(@"latitude = %f", ((CLLocation *)[locations lastObject]).coordinate.latitude); [manager stopUpdatingLocation]; }
后面的处理和上面的方法一样,大家可以看一下。
另外还有一些CLGeocoder的属性如下:
@property (nonatomic, readonly) NSDictionary *addressDictionary; // address dictionary properties @property (nonatomic, readonly) NSString *name; // eg. Apple Inc. @property (nonatomic, readonly) NSString *thoroughfare; // street address, eg. 1 Infinite Loop @property (nonatomic, readonly) NSString *subThoroughfare; // eg. 1 @property (nonatomic, readonly) NSString *locality; // city, eg. Cupertino @property (nonatomic, readonly) NSString *subLocality; // neighborhood, common name, eg. Mission District @property (nonatomic, readonly) NSString *administrativeArea; // state, eg. CA @property (nonatomic, readonly) NSString *subAdministrativeArea; // county, eg. Santa Clara @property (nonatomic, readonly) NSString *postalCode; // zip code, eg. 95014 @property (nonatomic, readonly) NSString *ISOcountryCode; // eg. US @property (nonatomic, readonly) NSString *country; // eg. United States @property (nonatomic, readonly) NSString *inlandWater; // eg. Lake Tahoe @property (nonatomic, readonly) NSString *ocean; // eg. Pacific Ocean @property (nonatomic, readonly) NSArray *areasOfInterest; // eg. Golden Gate Park
完整的工程如下:
附件下载地址:https://github.com/winann/TestLocation.git
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