googleMap API使用

查询地址：
http://maps.google.com/maps/api/geocode/json?address=1600+Amphitheatre+Parkway ,+Mountain+View,+CA&sensor= true_or_false

eg： NSURL *url = [NSURL URLWithString: 
                  [[NSString stringWithFormat: @"http://maps.google.com/maps/api/geocode/json?address=%@&sensor=true", @"北京中关村"]stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]];

查询路线：
NSURL *url = [NSURL URLWithString: 
     [[NSString stringWithFormat: @"http://maps.google.com/maps/api/directions/json?origin=%@&destination=%@&sensor=false", @"中关村",@"西二旗"]stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]];





    NSURL *url = [NSURL URLWithString: 
                  [[NSString stringWithFormat: @"http://maps.google.com/maps/api/geocode/json?address=%@&sensor=true", @"北京中关村"]stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]];

    ASIHTTPRequest *request = [[ASIHTTPRequest alloc] initWithURL: url];
   [request addRequestHeader: @"Accept-Language" value: @"zh-cn,zh;q=0.5"];
    [request startSynchronous];
    NSString *locationJson = [request responseString];
    
    NSLog(@"locationJson=========%@",locationJson);
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