objective c - Where is NSTextField? -

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I am new to Mac OS X development, primarily a Java and C # developers I am reading this book And I am trying some examples from the book.

In my App Controller class, I am trying to add a IBOutlet : 

  IBOutlet NSTextField * textField;   
 This gives me an error in saying "unknown type name 'NSTextField'. I have imported Foundation / Foundation H  
 Please help.  
 
 
  #import & lt; cocoa / cocoa h & gt;   < P> Import it AppController header file

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