A little enhancement to avoid block capture the heap object

@@ -60,7 +60,7 @@ typedef void (^SDWebImageTransitionCompletionBlock)(BOOL finished);
 
 @end
 
-// Convenience way to use transition. Remember to specify the duration
+// Convenience way to create transition. Remember to specify the duration
 // for UIKit, these transition just use the correspond `animationOptions`
 // for AppKit, these transition use Core Animation in `animations`. So your view must be layer-backed. Set `wantsLayer = YES` before you apply it.
 

@@ -195,16 +195,16 @@ static char TAG_ACTIVITY_SHOW;
 #if SD_UIKIT || SD_MAC
     else if ([view isKindOfClass:[UIImageView class]]) {
         UIImageView *imageView = (UIImageView *)view;
-        finalSetImageBlock = ^(UIImage *tempImage, NSData *tempData) {
-            imageView.image = image;
+        finalSetImageBlock = ^(UIImage *setImage, NSData *setImageData) {
+            imageView.image = setImage;
         };
     }
 #endif
 #if SD_UIKIT
     else if ([view isKindOfClass:[UIButton class]]) {
         UIButton *button = (UIButton *)view;
-        finalSetImageBlock = ^(UIImage *tempImage, NSData *tempData){
-            [button setImage:image forState:UIControlStateNormal];
+        finalSetImageBlock = ^(UIImage *setImage, NSData *setImageData){
+            [button setImage:setImage forState:UIControlStateNormal];
         };
     }
 #endif