Question

此代码我已经适用于iOS 6，但似乎对iOS 7没有影响。如果设置跨度没有效果，我怎么能让它适用于iOS 7？

CLLocationCoordinate2D  ctrpoint = self.location.coordinate;


MapPoint *mp = [[MapPoint alloc] initWithCoordinate:ctrpoint title:[NSString stringWithFormat:@"%@: %@",NSLocalizedString(@"Pin Name:", @"Pin Name:"),self.pin.name] subtitle:self.pin.cell];
[self.mapView addAnnotation:mp];



MKCoordinateSpan span;

span.latitudeDelta = 0.2;
span.longitudeDelta = 0.2;

MKCoordinateRegion region;
region.span = span;
region.center = self.location.coordinate;

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

Answer 1

正确的方法是使用提供的常量：

- (MKCoordinateRegion)regionForWorld {
    return MKCoordinateRegionForMapRect(MKMapRectWorld);
}

所以

- (void)zoomToWorldAnimated:(BOOL)animated {
    MKCoordinateRegion region = [self regionForWorld];
    [self.mapView setRegion:region animated:animated];
}

Answer 2

假设self.mapView已经合成，我会做这样的事情：

MKCoordinateRegion region = [self.mapView regionThatFits:MKCoordinateRegionMakeWithDistance([self.location.coordinate, 800, 800)];
region.span.latitudeDelta = 0.2;
region.span.longitudeDelta = 0.2;
[self.mapView setRegion:region animated:YES];

请注意，MKCoordinateRegionMakeWithDistance中的800个值是“CLLocationDistance latitudinalMeters”和“CLLocationDistance longitudinalMeters”。您可能需要根据地图大小和所需的缩放级别更改这些内容。

对于地图点我会做这样的事情：

MKPointAnnotation *mapPoint = [[MKPointAnnotation alloc] init];
[mapPoint setCoordinate:self.location.coordinate];
[mapPoint setTitle:@"Your title"];
[mapPoint setSubtitle:@"My subtitle"];
[mapView addAnnotation:mapPoint];

我已经在iOS6和iOS7中对此进行了测试，可以保证它的工作正常。

如何在iOS 7中缩小mkmapview的负载

2 个答案: