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我说我是初学者,所以请千万不要错过任何一步! 我用代码来显示和“跳”到用户的位置:“显示当前位置”按钮(如Maps.app)
- (void)mapView:(MKMapView *)mv didAddAnnotationViews:(NSArray *)views {
for(MKAnnotationView *annotationView in views) {
if(annotationView.annotation == mv.userLocation) {
MKCoordinateRegion region;
MKCoordinateSpan span;
span.latitudeDelta=0.002;
span.longitudeDelta=0.002;
CLLocationCoordinate2D location=mv.userLocation.coordinate;
region.span=span;
region.center=location;
[mv setRegion:region animated:TRUE];
[mv regionThatFits:region];
}
}
但我想只是要求它,当我按下一个按钮。我该怎么办呢? (记住:我是初学者!)。提前致谢!
我试着用这段代码,但仍然不起作用(当我按下按钮时它会冻结)。 ' - (IBAction)goToLocation MKMapView * mapView; MKUserLocation * myLocation = [mapView userLocation]; CLLocationCoordinate2D coord = [[myLocation location] coordinate]; MKCoordinateRegion region = MKCoordinateRegionMakeWithDistance(coord,350,350); [mapView setRegion:region animated:YES]; [UIView beginAnimations:nil context:NULL]; [UIView setAnimationDuration:1]; [UIView commitAnimations]; }' – Netnyke
取出调用beginAnimations,setAnimationDuration和commitAnimations。你已经告诉你的setRegion调用动画,它会比你在这里做的更好。如果调试器仍然存在问题,请查看它冻结的线路。 –
您可能还想在这里添加这些行:region.span = span; region.center = location; –