苹果地图使用之MKMapView定位显示

最新推荐文章于 2021-03-31 17:15:48 发布

原创最新推荐文章于 2021-03-31 17:15:48 发布 · 3.6k 阅读

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本文介绍了一个iOS应用中集成地图功能的方法。使用MapKit框架展示地图，并通过CLLocationManager获取用户当前位置，实现用户跟踪模式。此外，还实现了点击按钮重置地图中心坐标到用户当前位置的功能。

#import <MapKit/MapKit.h>

#define kScreenWidht  [UIScreen mainScreen].bounds.size.width
#define kScreenHeight [UIScreen mainScreen].bounds.size.height

@interface ViewController () <MKMapViewDelegate>

@property (nonatomic, strong) MKMapView *mapView;
@property (nonatomic, strong) CLLocationManager *locationManager;

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    
    _mapView = [[MKMapView alloc] initWithFrame:self.view.bounds];
    _mapView.delegate = self;
    [_mapView setUserTrackingMode:MKUserTrackingModeFollow];
    [self.view addSubview:_mapView];
    
    _locationManager = [[CLLocationManager alloc] init];
    [_locationManager requestAlwaysAuthorization];
    
    CLLocationCoordinate2D coordinate = {30.26667, 120.20000};
    [_mapView setCenterCoordinate:coordinate animated:YES];
    
    // 定位按钮
    UIButton *resetLocationBtn = [[UIButton alloc] initWithFrame:CGRectMake(10, kScreenHeight - 45, 30, 35)];
    [resetLocationBtn setBackgroundImage:[UIImage imageNamed:@"location.jpg"] forState:UIControlStateNormal];
    [resetLocationBtn addTarget:self action:@selector(resetLocation:) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:resetLocationBtn];
}

#pragma mark - MKMapViewDelegate
- (void)mapView:(MKMapView *)mapView didUpdateUserLocation:(MKUserLocation *)userLocation
{
    // 位置发生变化调用
    NSLog(@"lan = %f, long = %f", userLocation.coordinate.latitude, userLocation.coordinate.longitude);
}

- (void)resetLocation:(id)sender {
    // 定位到我的位置
    [_mapView setCenterCoordinate:_mapView.userLocation.coordinate animated:YES];
}

@end