[Xcode]How to slide the map to the tapped position in MKMapView

2014年2月8日2023年5月28日 1分

Good evening, this is Bono.

I was making a map app and felt like I would use it in the future, so I made a note of it.

　　　コンテンツ

When you want to slide the map to the tapped position in MKMapView
- code

When you want to slide the map to the tapped position in MKMapView

Basically, the following flow.

Register gesture events
Tap is detected
Get tapped coordinates
Animated slide to those coordinates

code

#import "SecondViewController.h"

@interface SecondViewController ()

@end

@implementation SecondViewController {
    MKMapView *mapView;
}

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {

        // Custom initialization
        CGRect disp = [[UIScreen mainScreen] bounds];

        //mapViewの生成
        mapView = [[MKMapView alloc]initWithFrame:CGRectMake(0, 0, disp.size.width, disp.size.height)];
        [self.view addSubview:mapView];

        mapView.delegate = self;
        MKCoordinateRegion region = mapView.region;
        region.span.latitudeDelta = 0.05;
        region.span.longitudeDelta = 0.05;
        region.center = CLLocationCoordinate2DMake(35.658517, 139.701334);
        [mapView setRegion:region animated:YES];

        //ジェスチャーの登録
        UITapGestureRecognizer *tapGesture = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(mapTapped:)];
        [mapView addGestureRecognizer:tapGesture];
    }
}

//タップされた時の動作
- (void)mapTapped:(UITapGestureRecognizer *)sender
{
    CGPoint location = [sender locationInView:mapView];
    CLLocationCoordinate2D mapPoint = [mapView convertPoint:location toCoordinateFromView:mapView];

    //アニメーションで移動
    [mapView setCenterCoordinate:mapPoint animated:YES];
}

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