- fix lint warning

PNTwitterCover.podspec

@@ -8,7 +8,7 @@
 
 Pod::Spec.new do |s|
   s.name             = 'PNTwitterCover'
-  s.version          = '1.0.2'
+  s.version          = '1.0.3'
   s.summary          = 'PNTwitterCover is a UUIscrollView Category to add blur and zoom during scroll bounce'
 
 # This description is used to generate tags and improve search results.

PNTwitterCover/Classes/PNTwitterCoverView.m

@@ -48,12 +48,15 @@
 
 - (void)prepareForBlurImages
 {
-    CGFloat factor = 0.1;
+    
     [_blurImages addObject:self.image];
+    dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_HIGH, 0), ^{
+        CGFloat factor = 0.1;
         for (NSUInteger i = 0; i < 20; i++) {
             [_blurImages addObject:[self.image boxblurImageWithBlur:factor]];
             factor+=0.04;
         }
+    });
 }
 
 - (void)setScrollView:(UIScrollView *)scrollView