[iOS] Update Locations

• iOS 6建議使用 didUpdateLocations, 而非 didUpdateToLocation
• iOS6之前
• Controller 繼承 protocol <CLLocationManagerDelegate>
• e.g. FirstViewController : UIViewController <CCLocationManagerDelegate>
• 宣告一個 CLLocationManger 的 property並在 .m中 synthesize
• e.g. @property (nonatomic, retain) CLLocationManager *locationManager; 
• 實作 didUpdateToLocation: (CLLocation *) newLocation fromLocation: (CLLocation *)
• e.g. 通常會將 outlet的 View其內容作設定
• e.g. locationTextView.text = [NSString stringWithFormat: @"lat %+6.f", newLocation.coordination.latitude];
• 改為覆寫 didUpdateLocations: (NSArray *) locations
• 並用 [locations lastObject]來取用最新位置
• Ref:
• iphone-didUpdateLocations instead of didUpdateToLocation