Fix the correct naming of context option perferredBitmap to prefersBitmap

Author: dreampiggy

SDWebImagePDFCoder/Classes/SDImagePDFCoder.m

@@ -130,16 +130,16 @@ - (UIImage *)decodedImageWithData:(NSData *)data options:(SDImageCoderOptions *)
     }
 
     NSUInteger pageNumber = 0;
-    BOOL preferredBitmap = NO;
+    BOOL prefersBitmap = NO;
     CGSize imageSize = CGSizeZero;
     BOOL preserveAspectRatio = YES;
     // Parse args
     SDWebImageContext *context = options[SDImageCoderWebImageContext];
     if (context[SDWebImageContextPDFPageNumber]) {
         pageNumber = [context[SDWebImageContextPDFPageNumber] unsignedIntegerValue];
     }
-    if (context[SDWebImageContextPDFPerferredBitmap]) {
-        preferredBitmap = [context[SDWebImageContextPDFPerferredBitmap] boolValue];
+    if (context[SDWebImageContextPDFPrefersBitmap]) {
+        prefersBitmap = [context[SDWebImageContextPDFPrefersBitmap] boolValue];
     }
     if (context[SDWebImageContextPDFImageSize]) {
         NSValue *sizeValue = context[SDWebImageContextPDFImageSize];
@@ -154,7 +154,7 @@ - (UIImage *)decodedImageWithData:(NSData *)data options:(SDImageCoderOptions *)
     }
 
     UIImage *image;
-    if (!preferredBitmap && [self.class supportsVectorPDFImage]) {
+    if (!prefersBitmap && [self.class supportsVectorPDFImage]) {
         image = [self createVectorPDFWithData:data pageNumber:pageNumber];
     } else {
         image = [self createBitmapPDFWithData:data pageNumber:pageNumber targetSize:imageSize preserveAspectRatio:preserveAspectRatio];

SDWebImagePDFCoder/Classes/SDWebImagePDFCoderDefine.h

@@ -19,7 +19,7 @@ FOUNDATION_EXPORT SDWebImageContextOption _Nonnull const SDWebImageContextPDFPag
  A BOOL value which specify whether we prefer the actual bitmap representation instead of vector representation for PDF image. This is because the UIImage on iOS 11+ (NSImgae on macOS) can use the vector image format, which support dynamic scale without losing any detail. However, for some image processing logic, user may need the actual bitmap representation to manage pixels. Also, for lower firmware on iOS, the `UIImage` does not support vector rendering, user may want to handle them using the same code. (NSNumber)
  If you don't provide this value, use NO for default value and prefer the vector format when possible.
  */
-FOUNDATION_EXPORT SDWebImageContextOption _Nonnull const SDWebImageContextPDFPerferredBitmap;
+FOUNDATION_EXPORT SDWebImageContextOption _Nonnull const SDWebImageContextPDFPrefersBitmap;
 
 #pragma mark - Bitmap Representation Options
 /**

SDWebImagePDFCoder/Classes/SDWebImagePDFCoderDefine.m

@@ -8,6 +8,6 @@
 #import "SDWebImagePDFCoderDefine.h"
 
 SDWebImageContextOption _Nonnull const SDWebImageContextPDFPageNumber = @"pdfPageNumber";
-SDWebImageContextOption _Nonnull const SDWebImageContextPDFPerferredBitmap = @"pdfPerferredBitmap";
+SDWebImageContextOption _Nonnull const SDWebImageContextPDFPrefersBitmap = @"pdfPrefersBitmap";
 SDWebImageContextOption _Nonnull const SDWebImageContextPDFImageSize = @"pdfImageSize";
 SDWebImageContextOption _Nonnull const SDWebImageContextPDFImagePreserveAspectRatio = @"pdfImagePreserveAspectRatio";