-(void)openMaps:(id)sender{

    NSString *addressText = @"1 Queen st, Auckland,NZ";

    addressText = [addressText stringByAddingPercentEscapesUsingEncoding:NSASCIIStringEncoding];

    NSString * urlText = [NSString stringWithFormat:@"http://maps.google.com/maps?q=%@",addressText];

    [[UIApplication sharedApplication] openURL:[NSURL URLWithString:urlText]];

}

实现如上代码，即可；

效果：

参考

www.blog.sina.com.cn/s/blog_5fae23350100dmln.html