title: iOS Pin It SDK with no documentation and sample code
body: <p>I'm trying to go through the basic tutorial on <a href="http://developers.pinterest.com/ios/" rel="nofollow">Pinterest's website.</a></p>
  
  <p>the link for downloading documentation and iOS sdk doesn't provide documentation or sample code.there was only bundles in it</p>
  
  <p>here is my viewcontroller.m file</p>
  
  <pre><code>#import "ViewController.h"
  #import &lt;Pinterest/Pinterest.h&gt;
  
  @interface ViewController ()
  
  @end
  
  @implementation ViewController
  
  - (void)viewDidLoad
  {
      [super viewDidLoad];
      // Do any additional setup after loading the view, typically from a nib.
      UIButton* pinItButton = [Pinterest pinItButton];
      [pinItButton addTarget:self
                      action:@selector(pinIt:)
            forControlEvents:UIControlEventTouchUpInside];
      [self.view addSubview:pinItButton];
  
  }
  
  - (void)didReceiveMemoryWarning
  {
      [super didReceiveMemoryWarning];
      // Dispose of any resources that can be recreated.
  }
  
  - (void)pinIt:(id)sender
  {
      Pinterest *pinterest = [[Pinterest alloc]initWithClientId:@"1431885" urlSchemeSuffix:@"pin1431885"];
      [pinterest createPinWithImageURL:@"http://www.warrenphotographic.co.uk/photography/bigs/10122-Silver-and-red-kittens-white-background.jpg" sourceURL:@"http://placekitten.com" description:@"Pinning from Pin It Demo"];
  }
  
  @end
  </code></pre>
  
  <p>my code is fairly straight forward, i just couldn't get it running on my dev iphone
  it kept throwing:</p>
  
  <pre><code>2013-06-06 17:17:27.787 Pinterest Testing[9403:907] -[__NSCFConstantString absoluteString]: unrecognized selector sent to instance 0x1c86c
  2013-06-06 17:17:31.626 Pinterest Testing[9403:907] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[__NSCFConstantString absoluteString]: unrecognized selector sent to instance 0x1c86c'
  *** First throw call stack:
  (0x32f4d3e7 0x3ac48963 0x32f50f31 0x32f4f64d 0x32ea7208 0x1a9f9 0x1a71d 0x34e47087 0x34e4703b 0x34e47015 0x34e468cb 0x34e46db9 0x34d6f5f9 0x34d5c8e1 0x34d5c1ef 0x36a745f7 0x36a74227 0x32f223e7 0x32f2238b 0x32f2120f 0x32e9423d 0x32e940c9 0x36a7333b 0x34db02b9 0x19f4d 0x3b075b20)
  libc++abi.dylib: terminate called throwing an exception
  </code></pre>