title: What is a convenience initializer as it pertains to Objective-C?
body: <p>I started learning programming about 8 months ago, started with C, OOP, now onto iOS, which is my goal.  Everything is going pretty smooth for the most part and I've started to practice by programming small applications on xcode.  It's just little terms like convenience initializer that sometimes throw me off.  Can anyone define this term for me and just give me a quick example of its usage?  I understand the concept of allocation and initialization but I am unable to differentiate between an initializer and a convenience initializer.  I've looked online but not much luck.</p>
  
  <p>Any help is appreciated, thanks</p>