Merge pull request #8 from SDWebImage/project_fix_xcode12

Fix the compile issue on Xcode 12

Author: dreampiggy

Example/Podfile.lock

@@ -1,14 +1,14 @@
 PODS:
   - Expecta (1.0.6)
-  - SDWebImage/Core (5.7.0)
-  - SDWebImageYYPlugin (0.4.0):
+  - SDWebImage/Core (5.9.0)
+  - SDWebImageYYPlugin (0.5.0):
     - SDWebImage/Core (~> 5.7)
-    - SDWebImageYYPlugin/YYCache (= 0.4.0)
-    - SDWebImageYYPlugin/YYImage (= 0.4.0)
-  - SDWebImageYYPlugin/YYCache (0.4.0):
+    - SDWebImageYYPlugin/YYCache (= 0.5.0)
+    - SDWebImageYYPlugin/YYImage (= 0.5.0)
+  - SDWebImageYYPlugin/YYCache (0.5.0):
     - SDWebImage/Core (~> 5.7)
     - YYCache
-  - SDWebImageYYPlugin/YYImage (0.4.0):
+  - SDWebImageYYPlugin/YYImage (0.5.0):
     - SDWebImage/Core (~> 5.7)
     - YYImage/Core
   - YYCache (1.0.4)
@@ -34,8 +34,8 @@ EXTERNAL SOURCES:
 
 SPEC CHECKSUMS:
   Expecta: 3b6bd90a64b9a1dcb0b70aa0e10a7f8f631667d5
-  SDWebImage: a99471f452bdfa0ca52ddf5b1adf2b61cab1d1eb
-  SDWebImageYYPlugin: daa0b74897dd769fa63092e60cde49f3719048bc
+  SDWebImage: 62ae4a18473520c67b79e9724c31a63599cc9423
+  SDWebImageYYPlugin: 6808c1a0e3f59feb604c1f492e02dddf51c83b10
   YYCache: 8105b6638f5e849296c71f331ff83891a4942952
   YYImage: 1e1b62a9997399593e4b9c4ecfbbabbf1d3f3b54
 

SDWebImageYYPlugin/Classes/YYCache/YYCacheBridge/YYCache+SDAdditions.m

@@ -169,9 +169,9 @@ @implementation YYCache (SDAdditions)
         queryDiskBlock(diskData);
     } else {
         // YYDiskCache's completion block is called in the global queue
-        [self.diskCache objectForKey:key withBlock:^(NSString * _Nonnull key, id<NSObject, NSCoding> _Nullable object) {
+        [self.diskCache objectForKey:key withBlock:^(NSString * _Nonnull key, id<NSCoding>  _Nullable object) {
             NSData *diskData = nil;
-            if ([object isKindOfClass:[NSData class]]) {
+            if ([(id<NSObject>)object isKindOfClass:[NSData class]]) {
                 diskData = (NSData *)object;
             }
             queryDiskBlock(diskData);