[PINCache] Declare necessary APIs to avoid a direct dependency.

CHANGELOG.md

@@ -1,6 +1,7 @@
 ## master
 
 * Add your own contributions to the next release on the line below this with your name.
+- [PINCache] Set a default .byteLimit to reduce disk usage & startup time. [#595](https://github.com/TextureGroup/Texture/pull/595) [Scott Goodson](https://github.com/appleguy)
 - [ASNetworkImageNode] Fix deadlock in GIF handling. [#582](https://github.com/TextureGroup/Texture/pull/582) [Garrett Moon](https://github.com/garrettmoon)
 - [ASDisplayNode] Add attributed versions of a11y label, hint and value. [#554](https://github.com/TextureGroup/Texture/pull/554) [Alexander Hüllmandel](https://github.com/fruitcoder)
 - [ASCornerRounding] Introduce .cornerRoundingType: CALayer, Precomposited, or Clip Corners. [Scott Goodson](https://github.com/appleguy) [#465](https://github.com/TextureGroup/Texture/pull/465)

Source/Details/ASPINRemoteImageDownloader.m

@@ -76,6 +76,15 @@ - (BOOL)isDataSupported:(NSData *)data
 @end
 #endif
 
+// Declare two key methods on PINCache objects, avoiding a direct dependency on PINCache.h
+@protocol ASPINCache
+- (id)diskCache;
+@end
+
+@protocol ASPINDiskCache
+@property (assign) NSUInteger byteLimit;
+@end
+
 @interface ASPINRemoteImageManager : PINRemoteImageManager
 @end
 
@@ -88,12 +97,15 @@ @implementation ASPINRemoteImageManager
   static id <PINRemoteImageCaching> cache = nil;
   dispatch_once(&onceToken, ^{
     cache = [[PINRemoteImageManager sharedImageManager] cache];
-
-    // Set a default byteLimit. PINCache recently implemented a 50MB default (PR #201).
-    // Ensure that older versions of PINCache also have a byteLimit applied.
-    PINDiskCache *diskCache = [ASDynamicCast(cache, PINCache) diskCache];
-    // NOTE: Using 20MB limit while large cache initialization is being optimized (Issue #144).
-    diskCache.byteLimit = 20 * 1024 * 1024;
+    if ([cache respondsToSelector:@selector(diskCache)]) {
+      id diskCache = [(id <ASPINCache>)cache diskCache];
+      if ([diskCache respondsToSelector:@selector(setByteLimit:)]) {
+        // Set a default byteLimit. PINCache recently implemented a 50MB default (PR #201).
+        // Ensure that older versions of PINCache also have a byteLimit applied.
+        // NOTE: Using 20MB limit while large cache initialization is being optimized (Issue #144).
+        ((id <ASPINDiskCache>)diskCache).byteLimit = 20 * 1024 * 1024;
+      }
+    }
   });
   return cache;
 }