ios学习--openURL的使用方法

1.Map http://maps.google.com/maps?q=Shanghai
2.Email mailto://myname@google.com
3.Tel tel://10086
4.Msg sms://10086
openURL能帮助你运行Maps，SMS，Browser,Phone甚至其他的应用程序。这是Iphone开发中我经常需要用到的一段代码，它仅仅只有一行而已。
- (IBAction)openMaps {
//打开地图
NSString*addressText = @"beijing";
//@"1Infinite Loop, Cupertino, CA 95014";
addressText =[addressTextstringByAddingPercentEscapesUsingEncoding:NSASCIIStringEncoding];
NSString*urlText = [NSStringstringWithFormat:@"http://maps.google.com/maps?q=%@",addressText];
NSLog(@"urlText=============== %@", urlText);
[[UIApplicationsharedApplication] openURL:[NSURL URLWithString:urlText]];
}

- (IBAction)openEmail {
//打开mail // Fire off an email to apple support
[[UIApplication sharedApplication]openURL:[NSURL URLWithString:@"mailto://devprograms@apple.com"]];
}

- (IBAction)openPhone {

//拨打电话
// CallGoogle 411
[[UIApplication sharedApplication] openURL:[NSURLURLWithString:@"tel://8004664411"]];
}

- (IBAction)openSms {
//打开短信
// Text toGoogle SMS
[[UIApplication sharedApplication] openURL:[NSURLURLWithString:@"sms://466453"]];
}

-(IBAction)openBrowser {
//打开浏览器
// Lanuch any iPhone developers fav site
[[UIApplication sharedApplication] openURL:[NSURLURLWithString:@"http://itunesconnect.apple.com"]];
}
iphone程序内调用谷歌地图

使用CLLocationManager类，MKMapView。并且实现<MKMapViewDelegate,CLLocationManagerDelegate>
//初始化CLLocationManager，CLLocationManager获得当前地理坐标
locmanager=[[CLLocationManager alloc]init];

[locmanager setDelegate:self];
//设置精确度
[locmanager setDesiredAccuracy:kCLLocationAccuracyBest];

[locmanager startUpdatingLocation];
执行完以后，会自动调用代理方法: