Question

我按照下面的代码，输出可以打印到控制台，但是如何在MapView上更新？

- (void)viewDidLoad {
   [super viewDidLoad];

    /* We have our address */
    NSString *oreillyAddress = @"1005 Gravenstein Highway North, Sebastopol, CA 95472, USA";

    /* We will later insert the address and the format that we want our output in, into this API's URL */
    NSString *geocodingURL = @"http://maps.google.com/maps/geo?q=%@&output=%@";
    /* Insert the address and the output format into the URL */
    NSString *finalURL = [NSString stringWithFormat:geocodingURL, oreillyAddress, GOOGLE_OUTPUT_FORMAT_CSV];
    /* Now escape the URL using appropriate percentage marks */

    finalURL = [finalURL stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
    /* Create our URL */
    NSURL *urlToCall = [NSURL URLWithString:finalURL];
    /* And a request for the connection using the URL */
    NSURLRequest *request = [NSURLRequest requestWithURL:urlToCall];

    /* We will put all the connection's received data into this instance of the NSMutableData class */
    NSMutableData *newMutableData = [[NSMutableData alloc] init];
    self.connectionData = newMutableData;
    [newMutableData release];
    NSURLConnection *newConnection = [[NSURLConnection alloc] initWithRequest:request delegate:self];
    /* Create the connection and start the downloading of geocoding results */
    self.myConnection = newConnection;
    [newConnection release];
}

- (void) viewDidUnload{
    [super viewDidUnload];
    [self.myConnection cancel];
    self.myConnection = nil;
    self.connectionData = nil;
}

- (BOOL)shouldAutorotateToInterfaceOrientation:
(UIInterfaceOrientation)interfaceOrientation {
    /* Support all orientations */
    return YES;
}

- (void)dealloc {
    [myConnection cancel];
    [myConnection release];
    [connectionData release];
    [super dealloc];
}
@end

Answer 1

您必须获取该位置的lat-long信息。您必须创建一个采用MKAnnotation协议的类，并添加一个实例，使用MKMapView方法存储您到addAnnotation:对象的位置。如果位置位于地图的显示区域内，则地图视图对象将调用委托方法mapView:viewForAnnotation:以获取要为该注释显示的视图。因此，您必须采用MKMapViewDelegate协议成为委托人。实现mapView:viewForAnnotation:方法以返回MKPinAnnotationView实例或您自己的MKAnnotationView的子类。

如果位置不在显示的区域内，请使用setRegion:animated:方法移至该位置。

如何将plist的地址更新为Mapview？

1 个答案: