[iOS Dev] Detect App Running on Simulator or Actual Device - 判斷App執行在模擬器或是實體

對於開發時要設定不同參數很有幫助
It's helpful to set different config.

#if TARGET_IPHONE_SIMULATOR
  // It's running on the simulator 目前跑在模擬器上
#else
  // Running on Actual Device  在實機上跑
#endif