Merge pull request #3 from SDWebImage/change_hidden_symbol

Changing the PDF symbol naming with the encoded string instead

Author: dreampiggy

.gitignore

@@ -34,6 +34,7 @@ Carthage/Build
 # `pod install` in .travis.yml
 #
 Pods/
+Podfile.lock
 
 # SwiftPM
 .swiftpm

Example/Podfile.lock

@@ -386,16 +386,12 @@
 			buildActionMask = 2147483647;
 			files = (
 			);
-			inputFileListPaths = (
-			);
 			inputPaths = (
 				"${PODS_ROOT}/Target Support Files/Pods-SDWebImagePDFCoder_Example macOS/Pods-SDWebImagePDFCoder_Example macOS-frameworks.sh",
 				"${BUILT_PRODUCTS_DIR}/SDWebImage-macOS/SDWebImage.framework",
 				"${BUILT_PRODUCTS_DIR}/SDWebImagePDFCoder-macOS/SDWebImagePDFCoder.framework",
 			);
 			name = "[CP] Embed Pods Frameworks";
-			outputFileListPaths = (
-			);
 			outputPaths = (
 				"${TARGET_BUILD_DIR}/${FRAMEWORKS_FOLDER_PATH}/SDWebImage.framework",
 				"${TARGET_BUILD_DIR}/${FRAMEWORKS_FOLDER_PATH}/SDWebImagePDFCoder.framework",
@@ -410,16 +406,12 @@
 			buildActionMask = 2147483647;
 			files = (
 			);
-			inputFileListPaths = (
-			);
 			inputPaths = (
 				"${PODS_ROOT}/Target Support Files/Pods-SDWebImagePDFCoder_Example/Pods-SDWebImagePDFCoder_Example-frameworks.sh",
 				"${BUILT_PRODUCTS_DIR}/SDWebImage-iOS/SDWebImage.framework",
 				"${BUILT_PRODUCTS_DIR}/SDWebImagePDFCoder-iOS/SDWebImagePDFCoder.framework",
 			);
 			name = "[CP] Embed Pods Frameworks";
-			outputFileListPaths = (
-			);
 			outputPaths = (
 				"${TARGET_BUILD_DIR}/${FRAMEWORKS_FOLDER_PATH}/SDWebImage.framework",
 				"${TARGET_BUILD_DIR}/${FRAMEWORKS_FOLDER_PATH}/SDWebImagePDFCoder.framework",

Example/SDWebImagePDFCoder.xcodeproj/project.pbxproj

@@ -12,20 +12,27 @@
 #define SD_FOUR_CC(c1,c2,c3,c4) ((uint32_t)(((c4) << 24) | ((c3) << 16) | ((c2) << 8) | (c1)))
 
 #if SD_UIKIT || SD_WATCH
-// iOS/tvOS 11+ UIImage add built-in vector PDF image support. So we use that instead of drawing bitmap image
-@interface UIImage (PrivatePDFSupport)
+static SEL SDImageWithCGPDFPageSEL = NULL;
+static SEL SDCGPDFPageSEL = NULL;
 
-- (instancetype)_initWithCGPDFPage:(CGPDFPageRef)page;
-- (instancetype)_initWithCGPDFPage:(CGPDFPageRef)page scale:(double)scale orientation:(UIImageOrientation)orientation;
-+ (instancetype)_imageWithCGPDFPage:(CGPDFPageRef)page;
-+ (instancetype)_imageWithCGPDFPage:(CGPDFPageRef)page scale:(double)scale orientation:(UIImageOrientation)orientation;
-- (CGPDFPageRef)_CGPDFPage;
-
-@end
+static inline NSString *SDBase64DecodedString(NSString *base64String) {
+    NSData *data = [[NSData alloc] initWithBase64EncodedString:base64String options:NSDataBase64DecodingIgnoreUnknownCharacters];
+    if (!data) {
+        return nil;
+    }
+    return [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
+}
 #endif
 
 @implementation SDImagePDFCoder
 
+#if SD_UIKIT || SD_WATCH
++ (void)initialize {
+    SDImageWithCGPDFPageSEL = NSSelectorFromString(SDBase64DecodedString(@"X2ltYWdlV2l0aENHUERGUGFnZTo="));
+    SDCGPDFPageSEL = NSSelectorFromString(SDBase64DecodedString(@"X0NHUERGUGFnZQ=="));
+}
+#endif
+
 + (SDImagePDFCoder *)sharedCoder {
     static dispatch_once_t onceToken;
     static SDImagePDFCoder *coder;
@@ -98,7 +105,7 @@ - (NSData *)encodedDataWithImage:(UIImage *)image format:(SDImageFormat)format o
     }
     return ((NSPDFImageRep *)imageRep).PDFRepresentation;
 #else
-    CGPDFPageRef page = [image _CGPDFPage];
+    CGPDFPageRef page = ((CGPDFPageRef (*)(id,SEL))[image methodForSelector:SDCGPDFPageSEL])(image, SDCGPDFPageSEL);
     if (!page) {
         return nil;
     }
@@ -154,7 +161,7 @@ - (UIImage *)createVectorPDFWithData:(nonnull NSData *)data pageNumber:(NSUInteg
         return nil;
     }
 
-    image = [UIImage _imageWithCGPDFPage:page];
+    image = ((UIImage *(*)(id,SEL,CGPDFPageRef))[UIImage.class methodForSelector:SDImageWithCGPDFPageSEL])(UIImage.class, SDImageWithCGPDFPageSEL, page);
     CGPDFDocumentRelease(document);
 #endif
 
@@ -231,7 +238,7 @@ + (BOOL)supportsVectorPDFImage {
     static BOOL supports;
     dispatch_once(&onceToken, ^{
         // iOS 11+ supports PDF built-in rendering, use selector to check is more accurate
-        if ([UIImage respondsToSelector:@selector(_imageWithCGPDFPage:)]) {
+        if ([UIImage respondsToSelector:SDImageWithCGPDFPageSEL]) {
             supports = YES;
         } else {
             supports = NO;