判断手机应用是否包含相关地图应用，有就显示，没有就不显示相关跳转按钮

- (void)showSheet {
   
   UIActionSheet *sheet = [[UIActionSheet alloc] initWithTitle:@"选择地图" delegate:self cancelButtonTitle:@"取消" destructiveButtonTitle:nil otherButtonTitles:nil, nil];
   if ( [[UIApplication sharedApplication] canOpenURL:[NSURL URLWithString:@"http://maps.apple.com/"]]) {
       [sheet addButtonWithTitle:@"苹果地图"];
   }
   if ( [[UIApplication sharedApplication] canOpenURL:[NSURL URLWithString:@"baidumap://"]]){
       [sheet addButtonWithTitle:@"百度地图"];
   }
   if ( [[UIApplication sharedApplication] canOpenURL:[NSURL URLWithString:@"iosamap://"]]) {
       [sheet addButtonWithTitle:@"高德地图"];
   }
   [sheet showInView:self.view];
}

跳转对应地图应用内进行导航

- (void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex {
    NSString *title = [actionSheet buttonTitleAtIndex:buttonIndex];
    
    if ([title isEqualToString:@"苹果地图"]) {
        MKMapItem *currentLocation = [MKMapItem mapItemForCurrentLocation];
         CLLocationCoordinate2D coords2 = CLLocationCoordinate2DMake(23.05,113.15);
        MKMapItem *toLocation = [[MKMapItem alloc] initWithPlacemark:[[MKPlacemark alloc] initWithCoordinate:coords2 addressDictionary:nil]];
        //目的地名字
        toLocation.name = self.addressString;
        [MKMapItem openMapsWithItems:@[currentLocation, toLocation]
                       launchOptions:@{MKLaunchOptionsDirectionsModeKey: MKLaunchOptionsDirectionsModeDriving,MKLaunchOptionsShowsTrafficKey: [NSNumber numberWithBool:YES]}];
    
    } else if ([title isEqualToString:@"高德地图"]) {
        NSString *urlString = [[NSString stringWithFormat:@"iosamap://path?sourceApplication=applicationName&sid=BGVIS1&did=BGVIS2&dname=%@&dev=0&t=0",@"浙医二院"] stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
        [[UIApplication sharedApplication] openURL:[NSURL URLWithString:urlString]];
    } else if ([title isEqualToString:@"百度地图"]) {
        NSString *urlString = [[NSString stringWithFormat:@"baidumap://map/geocoder?src=%@&address=%@",@"andr.baidu.openAPIdemo",@"浙医二院"] stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
        [[UIApplication sharedApplication] openURL:[NSURL URLWithString:urlString]];
    }
}