title: objective c regex how to find string and returning contained line?
body: <p>I have a sample of tex just like this.I need objective c to find for example string "龜" and return all containing line</p>
  
  <p>齶 737B U9f76 B211 S24 XJ15642 N5437 V7100 MN48725 MP12.1108 P1-15-9 I3d21.1 Q2672.7 Ye4 Wag ガク あご はぐき {jaw} </p>
  
  <p>龕 737C U9f95 B9 C212 S22 N568 V7104 MN48839 MP12.1151 P2-2-20 I2a20.3 Q8021.1 Ykan1 Wgam カン ガン れい {alcove for an image} </p>
  
  <p>龜 737D U9f9c B213 S18 S16 XJ03535 XH2147 XN5445 V7106 H2150 O2598A MN48847 MP12.1151 P2-2-16 I2n9.1 Q2711.7 ZPP4-18-4 Ygui1 Yjun1 Yqiu1 Wgwi Wgu Wgyun キ キュウ キン かめ T1 ひさし {turtle} {tortoise} </p>
  
  <p>龠 737E U9fa0 B214 S17 N5446 V7107 H2149 MN48882 MP12.1159 P2-2-15 I2a15.5 Q8022.7 ZPP2-3-14 Yyue4 Wyag ヤク ふえ {flute}</p>