苦苦寻找一种方法来使地图缩放并以注释引脚为中心. Pin下降,但地图加载海洋.代码如下.
- - (void) connectionDidFinishLoading:(NSURLConnection *)connection
- {
- [self setString];
- NSDictionary *dic = [NSJSONSerialization JSONObjectWithData:responseData options:0 error:nil];
- NSDictionary *location = [dic objectForKey:@"location"];
- NSDictionary *coordinate = [location objectForKey:@"coordinate"];
- NSString *lat = [coordinate objectForKey:@"latitude"];
- NSString *lon = [coordinate objectForKey:@"longitude"];
- for (NSDictionary *diction in coordinate)
- {
- [array addObject:lat];
- [array addObject:lon];
- }
- {
- CLLocationCoordinate2D track;
- track.latitude = [lat doubleValue];
- track.longitude = [lon doubleValue];
- MapViewAnnotation *newAnnotation = [[MapViewAnnotation alloc] initWithTitle:@"Title of Place Here" andCoordinate:track];
- [self.mapView addAnnotation:newAnnotation];
- }
- }
第2个问题,非常相关:
在实现上述问题的答案后,我已经修改了我的代码.现在,我的坐标从前一个视图到我的MKMapView,所以我不必费心去做两次API调用,第二个是在MKMapView中.目前在我的ViewWillAppear中,我有以下内容,并且AGAIN遇到了一个问题,即视图不会居中并放大图钉:
- if ([self.stringToDisplay isEqualToString: @"Firehouse Gallery"])
- {
- UIImage *img = [UIImage imageNamed:@"firehouse.jpg"];
- [imageView setImage:img];
- CLLocationCoordinate2D track;
- track.latitude = [lat doubleValue];
- track.longitude = [lon doubleValue];
- MKCoordinateRegion region;
- MKCoordinateSpan span;
- span.latitudeDelta = 0.01;
- span.longitudeDelta = 0.01;
- region.span = span;
- region.center = track;
- MapViewAnnotation *newAnnotation = [[MapViewAnnotation alloc] initWithTitle:@"Firehouse Gallery" andCoordinate:track];
- [self.mapView addAnnotation:newAnnotation];
- [self.mapView setRegion:region animated:TRUE];
- [self.mapView regionThatFits:region];
- }
反馈非常感谢,因为我不知道还应该做些什么.引脚加载到正确的坐标上,只是没有居中/缩放…
解决方法
试试这个:
- {
- CLLocationCoordinate2D track;
- track.latitude = [lat doubleValue];
- track.longitude = [lon doubleValue];
- MKCoordinateRegion region;
- MKCoordinateSpan span;
- span.latitudeDelta = 0.01;
- span.longitudeDelta = 0.01;
- region.span = span;
- region.center = track;
- MapViewAnnotation *newAnnotation = [[MapViewAnnotation alloc] initWithTitle:@"Title of Place Here" andCoordinate:track];
- [self.mapView addAnnotation:newAnnotation];
- [self.mapView setRegion:region animated:TRUE];
- [self.mapView regionThatFits:region];
- }