Question

如何拍摄某些坐标的地图快照？现在它拍摄了整张地图的快照，但我想拍摄NewYork（40.7127°N，74.0059°）的快照。我尝试将region.center更改为纽约坐标，但我一直在旧金山。

MKMapSnapshotOptions *options = [[MKMapSnapshotOptions alloc] init];
options.region = self.mapView.region;
options.scale = [UIScreen mainScreen].scale;
options.size = self.mapView.frame.size;

MKMapSnapshotter *snapshotter = [[MKMapSnapshotter alloc] initWithOptions:options];
[snapshotter startWithCompletionHandler:^(MKMapSnapshot *snapshot, NSError *error) {
UIImage *image = snapshot.image;
NSData *data = UIImagePNGRepresentation(image);
[data writeToFile:[self snapshotFilename] atomically:YES];
}];

Answer 1

我之前做过。这是一种拍摄快照的方法。方法需要CLLocationCoordinate2D参数，在您的情况下，位置协调。

CLLocationCoordinate2D centerPoint = CLLocationCoordinate2DMake(40.730872, -74.003066);

在下面的方法中传递此坐标，它将捕获指定的位置。如果需要，可以从此方法中删除动画，它与功能无关，但最好将动画地图显示到特定位置。看看这个并分享你的想法。

- (void) takeSnapShot:(CLLocationCoordinate2D)centerPoint {

    __block MKCoordinateRegion newRegion = self.mapView.region;

    // Animation is use to animate map to location specified in parameter. If not required remove it.
    [UIView animateWithDuration:1.5 animations:^{

        MKCoordinateRegion region;
        region.center.latitude = centerPoint.latitude;
        region.center.longitude = centerPoint.longitude;
        region.span.latitudeDelta = 0.15f;
        region.span.longitudeDelta = 0.15f;
        newRegion = region;

        [self.mapView setRegion:region animated:YES];

    } completion:^(BOOL finished) {

        NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
        NSString *documentsDirectory = [paths objectAtIndex:0];
        NSString *fileName = [documentsDirectory stringByAppendingPathComponent:@"Snap.png"];

        MKMapSnapshotOptions *options = [[MKMapSnapshotOptions alloc] init];
        options.region = newRegion;
        options.scale = [UIScreen mainScreen].scale;
        options.size = self.mapView.frame.size;

        MKMapSnapshotter *snapshotter = [[MKMapSnapshotter alloc] initWithOptions:options];
        [snapshotter startWithCompletionHandler:^(MKMapSnapshot *snapshot, NSError *error) {
            UIImage *image = snapshot.image;
            NSData *data = UIImagePNGRepresentation(image);
            [data writeToFile:fileName atomically:YES];
        }];

    }];
}

拿一些坐标的MKMapSnapShot

1 个答案: