title: Remove Empty lines using Regular Expression
body: <p>I'm new to iOS develoment, I have the data like this below and i want to remove all the empty lines, Please let me know what the pattern to be applied:</p>
  
  <p>I have used the pattern as @"(\r\n)" and replaced it with @"", but it does not work. Please help me to sort out this issue</p>
  
  <pre><code>#EXTINF:-1 tvg-name="seedocs" tvg-logo="RT",RT
  
  
  
  
  
  http://rt.ashttp14.visionip.tv/live/rt-global-live-HD/playlist.m3u8
  
  #EXTINF:-1 tvg-name="hsn" tvg-logo="hsn",HSN TV
  
  rtsp://hsn.mpl.miisolutions.net:1935/hsn-live01/_definst_/mp4:420p500kB31
  
  #EXTINF:-1 tvg-name="us" tvg-logo="us",USTwit
  
  http://bglive-a.bitgravity.com/twit/live/high
  
  #EXTINF:-1 tvg-name="ALJAZEERA" tvg-logo="aljazeera",Aljazeera
  
  rtmp://aljazeeraflashlivefs.fplive.net/aljazeeraflashlive-live/aljazeera_eng_high
  
  #EXTINF:-1 tvg-name="bbc" tvg-logo="bbc",BBC World News
  
  
  
  #EXTINF:-1 tvg-name="vevo" tvg-logo="vevo",Vevo
  
  http://vevoplaylist-live.hls.adaptive.level3.net/vevo/ch1/06/prog_index.m3u8
  
  #EXTINF:-1 tvg-name="vevo2" tvg-logo="vevo2",Vevo 2
  
  http://vevoplaylist-live.hls.adaptive.level3.net/vevo/ch3/06/prog_index.m3u8
  
  #EXTINF:-1 tvg-name="1HD" tvg-logo="1HD",1HD
  
  rtmp://109.239.142.62/live/livestream3
  </code></pre>