#import#import "FKViewController.h"@interface FKViewController ()@property (nonatomic, strong) MKMapView* mapView;
@end
@implementation FKViewController
- (void)viewDidLoad
{
[super viewDidLoad];
self.mapView = [[MKMapView alloc] initWithFrame:self.view.bounds];
self.mapView.zoomEnabled = YES;
// 设置地图可滚动
self.mapView.scrollEnabled = YES;
// 设置地图不可旋转
self.mapView.rotateEnabled = NO;
// 设置地图显示用户位置
self.mapView.showsUserLocation = YES;
[self.view addSubview:self.mapView];
[self locateToLatitude:23.126272 longitude:113.395568];
// 创建一个手势处理器，用于检测、处理长按手势
UILongPressGestureRecognizer* gesture = [[UILongPressGestureRecognizer
alloc]initWithTarget:self action:@selector(longPress:)];
[self.mapView addGestureRecognizer:gesture];
self.mapView.delegate = self;
}
- (void)locateToLatitude:(CGFloat)latitude longitude:(CGFloat)longitude
{
// 设置地图中心的经、纬度
CLLocationCoordinate2D center = {latitude , longitude};
// 设置地图显示的范围，
MKCoordinateSpan span;
// 地图显示范围越小，细节越清楚
span.latitudeDelta = 0.01;
span.longitudeDelta = 0.01;
// 创建MKCoordinateRegion对象，该对象代表了地图的显示中心和显示范围。
MKCoordinateRegion region = {center,span};
// 设置当前地图的显示中心和显示范围
[self.mapView setRegion:region animated:YES];
}
- (void) longPress:(UILongPressGestureRecognizer*)gesture
{
// 获取长按点的坐标
CGPoint pos = [gesture locationInView:self.mapView];
// 将长按点的坐标转换为经度、维度值
CLLocationCoordinate2D coord = [self.mapView convertPoint:pos
toCoordinateFromView:self.mapView];
// 创建MKCircle对象，该对象代表覆盖层
MKCircle* circle = [MKCircle circleWithCenterCoordinate:coord radius:100];
// 添加MKOverlay
[self.mapView addOverlay:circle level:MKOverlayLevelAboveLabels];
}
// MKMapViewDelegate协议中的方法，该方法返回的MKOverlayRenderer负责绘制覆盖层控件
- (MKOverlayRenderer *)mapView:(MKMapView *)mapViewrendererForOverlay:(id)overlay
{
MKCircle * circle = (MKCircle*)overlay;
// 创建一个MKCircleRenderer对象
MKCircleRenderer* render = [[MKCircleRenderer alloc] initWithCircle:circle];
// 设置MKCircleRenderer的透明度
render.alpha = 0.5;
// 设置MKCircleRenderer的填充颜色和边框颜色
render.fillColor = [UIColor blueColor];
render.strokeColor = [UIColor redColor];
return render;
}
@end
