title: App crashes while loading image via URL iOS
body: <p>My app is crashing when it come to following code that is present below:</p>
  
  <pre><code>[cell.imgViewItem setImageWithURL:imageURL placeholderImage:nil completed:^(UIImage *image, NSError *error, SDImageCacheType cacheType, NSURL *imageURL) {
              NSLog(@"Finished");
          } usingActivityIndicatorStyle:UIActivityIndicatorViewStyleGray];
  </code></pre>
  
  <p><strong>Below is the log trace:</strong></p>
  
  <pre><code>2014-09-23 14:11:05.353 SmartSwipe[2834:60b] -[UIImageView sd_cancelImageLoadOperationWithKey:]: unrecognized selector sent to instance 0x79c56ce0
  2014-09-23 14:11:05.502 SmartSwipe[2834:60b] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[UIImageView sd_cancelImageLoadOperationWithKey:]: unrecognized selector sent to instance 0x79c56ce0'
  *** First throw call stack:
  (
      0   CoreFoundation                      0x034031e4 __exceptionPreprocess + 180
      1   libobjc.A.dylib                     0x031808e5 objc_exception_throw + 44
      2   CoreFoundation                      0x034a0243 -[NSObject(NSObject) doesNotRecognizeSelector:] + 275
      3   CoreFoundation                      0x033f350b ___forwarding___ + 1019
      4   CoreFoundation                      0x033f30ee _CF_forwarding_prep_0 + 14
      5   SmartSwipe                          0x0011c1a8 -[UIImageView(WebCache) sd_cancelCurrentImageLoad] + 56
      6   SmartSwipe                          0x00119744 -[UIImageView(WebCache) sd_setImageWithURL:placeholderImage:options:progress:completed:] + 276
      7   SmartSwipe                          0x0009cc18 -[UIImageView(UIActivityIndicatorForSDWebImage) setImageWithURL:placeholderImage:options:progress:completed:usingActivityIndicatorStyle:] + 504
      8   SmartSwipe                          0x0009c875 -[UIImageView(UIActivityIndicatorForSDWebImage) setImageWithURL:placeholderImage:completed:usingActivityIndicatorStyle:] + 229
      9   SmartSwipe                          0x0003f994 -[QuickScanViewController collectionView:cellForItemAtIndexPath:] + 948
      10  UIKit                               0x02395b30 -[UICollectionView _createPreparedCellForItemAtIndexPath:withLayoutAttributes:applyAttributes:] + 257
      11  UIKit                               0x02397775 -[UICollectionView _updateVisibleCellsNow:] + 4730
      12  UIKit                               0x0239b65f -[UICollectionView layoutSubviews] + 265
      13  UIKit                               0x01dbe964 -[UIView(CALayerDelegate) layoutSublayersOfLayer:] + 355
      14  libobjc.A.dylib                     0x0319282b -[NSObject performSelector:withObject:] + 70
      15  QuartzCore                          0x007a745a -[CALayer layoutSublayers] + 148
      16  QuartzCore                          0x0079b244 _ZN2CA5Layer16layout_if_neededEPNS_11TransactionE + 380
      17  QuartzCore                          0x0079b0b0 _ZN2CA5Layer28layout_and_display_if_neededEPNS_11TransactionE + 26
      18  QuartzCore                          0x007017fa _ZN2CA7Context18commit_transactionEPNS_11TransactionE + 294
      19  QuartzCore                          0x00702b85 _ZN2CA11Transaction6commitEv + 393
      20  QuartzCore                          0x00703258 _ZN2CA11Transaction17observer_callbackEP19__CFRunLoopObservermPv + 92
      21  CoreFoundation                      0x033cb36e __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 30
      22  CoreFoundation                      0x033cb2bf __CFRunLoopDoObservers + 399
      23  CoreFoundation                      0x033a9254 __CFRunLoopRun + 1076
      24  CoreFoundation                      0x033a89d3 CFRunLoopRunSpecific + 467
      25  CoreFoundation                      0x033a87eb CFRunLoopRunInMode + 123
      26  GraphicsServices                    0x03f345ee GSEventRunModal + 192
      27  GraphicsServices                    0x03f3442b GSEventRun + 104
      28  UIKit                               0x01d4ff9b UIApplicationMain + 1225
      29  SmartSwipe                          0x001105bd main + 141
      30  libdyld.dylib                       0x04ec5701 start + 1
      31  ???                                 0x00000001 0x0 + 1
  )
  libc++abi.dylib: terminating with uncaught exception of type NSException
  </code></pre>
  
  <p>Please help me, I am struggling with it. Thanks in advance.</p>