1)Xcode could not find a valid private certificate/valid key-pair for this profile in your keychain

2)UIBackgroundTaskIdentifier bgTask =0;
    UIApplication  *app = [UIApplication sharedApplication];
    bgTask = [app beginBackgroundTaskWithExpirationHandler:
              ^{
                  [app endBackgroundTask:bgTask];
              }];

3)https://github.com/spoletto/SPGooglePlacesAutocomplete

4) lipo -create libdevice.a libsimulator.a -output libcombined.a

5) DevToolsSecurity -enable

6) https://help.github.com/articles/generating-ssh-keys

7)$(ARCHS_STANDARD_32_BIT)

7) https://github.com/chenee/DarkBlue

8) http://www.appcoda.com/ios7-programming-ibeacons-tutorial

9) https://github.com/mttrb/BeaconOSX

10) http://stackoverflow.com/questions/19928623/read-data-from-ble-device

11) https://github.com/recruit-mp/RMPScrollingMenuBarController

12) https://coderwall.com/p/ezdcmg/symbolicating-an-ios-crash-log-without-the-original-dsym-file

13) find /Applications/Xcode.app -name symbolicatecrash -type f

14) cd /Applications/Xcode.app/Contents/SharedFrameworks/DTDeviceKitBase.framework/Versions/A/Resources/

15) atos -arch armv7 -o /Users/USERNAME/Desktop/xxx.app/xxx 0x36db8c84

16) http://apns-gcm.bryantan.info/

17) http://www.cocoawithlove.com/2008/09/streaming-and-playing-live-mp3-stream.html

18) install pod

    ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
    sudo gem update --system

sudo gem uninstall cocoapods
sudo rm -fr ~/.cocoapods/repos/master
sudo gem update --system --user-install
gem install --user-install cocoapods
sudo xcode-select --switch /Applications/Xcode.app/Contents/Developer
pod setup