iOS<MapKit/MapKit.h> MKMapView的简单使用

#import "ViewController.h"
#import <MapKit/MapKit.h>

@interface ViewController ()<MKMapViewDelegate>

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

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    /**
     // 创建一个地图视图
     */
    MKMapView *mapView = [[MKMapView alloc]initWithFrame:CGRectMake(0, 0, self.view.bounds.size.width, self.view.bounds.size.height)];
    self.mapView = mapView;
    
    
    /**
        创建一个UISegmentedControl, 来切换地图模式
     */
//    UISegmentedControl *seg = [[UISegmentedControl alloc]initWithFrame:CGRectMake(20,70, 150, 30)];
    // 一句话直接创建
    UISegmentedControl *seg = [[UISegmentedControl alloc]initWithItems:@[@"地图",@"卫星",@"混合"]];
    seg.frame = CGRectMake(100, 80, 150, 30);
    seg.selectedSegmentIndex = 0; // 默认选中0
    // 给一个点击事件方法,切换视图 ,
    [seg addTarget:self action:@selector(segbtnclick:) forControlEvents:UIControlEventValueChanged];
    
    /**
     //  再添加一个按钮, 返回原来的地方
     */
    UIButton *btn = [[UIButton alloc]init];
    btn.frame = CGRectMake(100, self.view.bounds.size.height - 50, 50, 30);
    [btn setTitle:@"返回" forState:UIControlStateNormal];
    [btn setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
    [btn addTarget:self action:@selector(btnClick) forControlEvents:UIControlEventTouchUpInside];
    
    /**
     *  添加一个放大按钮
     */
    UIButton *big = [[UIButton alloc]initWithFrame:CGRectMake(100, self.view.bounds.size.height - 90, 50, 30)];
    [big setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
    [big setTitle:@"放大" forState:UIControlStateNormal];
    [big addTarget:self action:@selector(bigClick) forControlEvents:UIControlEventTouchUpInside];
    
    /**
     *  添加一个缩小按钮
     */
    UIButton *small = [[UIButton alloc]initWithFrame:CGRectMake(200, self.view.bounds.size.height - 90, 50, 30)];
    [small setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
    [small setTitle:@"缩小" forState:UIControlStateNormal];
    [small addTarget:self action:@selector(smallClick) forControlEvents:UIControlEventTouchUpInside];
    
    [self.view addSubview:mapView];
    [self.view addSubview:seg];
    [self.view addSubview:btn];
    [self.view addSubview:big];
    [self.view addSubview:small];
    
   
    
    // 1 创建一个管理者
    self.manager = [[CLLocationManager alloc]init];
    
    // 2 进行授权
    [self.manager requestAlwaysAuthorization];
    
    // 3 跟踪用户位置
    mapView.userTrackingMode = MKUserTrackingModeFollow; // 总是跟踪
    
    // 4 设置代理
    mapView.delegate = self;
    
}

#pragma mark  跟踪到用户位置回来到此方法
/**
 *  跟踪用户实时位置
 *
 *  @param mapView
 *  @param userLocation 大头针模型类,
 */
- (void)mapView:(MKMapView *)mapView didUpdateUserLocation:(MKUserLocation *)userLocation{

    NSLog(@"%f--%f",userLocation.location.coordinate.latitude, userLocation.location.coordinate.longitude);
    
    // 设置标题和子标题
    userLocation.title = @"哈哈";
    userLocation.subtitle = @"子标题";

    // 还能获取范围, 区域, 显示范围
    NSLog(@"fanwei-%f-- %f",mapView.region.span.latitudeDelta, mapView.region.span.longitudeDelta);
    // 获取中心位置
    NSLog(@"center-%f--%f",mapView.region.center.latitude,mapView.region.center.longitude);

}

// 实现点击seg的方法
- (void)segbtnclick:(UISegmentedControl *)seg{

    NSInteger sel = seg.selectedSegmentIndex;
   
    switch (sel) {
        case 0:
            self.mapView.mapType = MKMapTypeStandard; // 默认
            break;
        case 1:
            self.mapView.mapType = MKMapTypeSatellite;// 卫星
            break;
        case 2:
            self.mapView.mapType = MKMapTypeHybrid;  // 混合
            break;
        default:
            break;
    }

}
//  点击返回,, 就回到原来的位置, 并且给个视图大小
- (void)btnClick{

    NSLog(@"按钮点击");
    //
//    CLLocationCoordinate2D center = CLLocationCoordinate2DMake(38, 108);
//    [self.mapView setCenterCoordinate:center animated:YES];
    
    

    CLLocationCoordinate2D center1 = CLLocationCoordinate2DMake(34.5, 115);
    MKCoordinateSpan span = MKCoordinateSpanMake(80, 80);
    //
    [self.mapView setRegion:MKCoordinateRegionMake(center1, span) animated:YES];


}

// 点击放大, 说白了就是中心不变, 改变span值
- (void)bigClick{

//    NSLog(@"放大");
    //1.1  现获取span
    MKCoordinateSpan span = self.mapView.region.span;
    
    //1.2  改变
        span.latitudeDelta -= 1;  // 每次缩小范围
        span.longitudeDelta -= 1;
    
    
    // 1.3 做个判断防止崩溃
    if (span.latitudeDelta < 0.01) {
        return;
    }
    
    if (span.longitudeDelta < 0.01) {
        return;
    }
    
    
    //1.3 重新赋值
    self.mapView.region = MKCoordinateRegionMake(self.mapView.region.center, span);
    

}
// 缩小,
- (void)smallClick{
    
    MKCoordinateSpan span = self.mapView.region.span;
    
    span.longitudeDelta += 1;
    span.latitudeDelta += 1;
    // 同时支持点语法
    [self.mapView setRegion:MKCoordinateRegionMake(self.mapView.region.center, span)];
    

}

#pragma mark region改变的时候
// 改变region,
- (void)mapView:(MKMapView *)mapView regionDidChangeAnimated:(BOOL)animated{

    // 打印一下
    NSLog(@"%f--%f",mapView.region.span.latitudeDelta,mapView.region.span.longitudeDelta);


}

@end