Check that NSCache is supported on current OS. If not, fall back to n…

…ot do caching. This lets us support iOS 3.x.
shogsbro · Jun 5, 2011 · d0903fc · d0903fc
1 parent afe369c
commit d0903fc
Showing 1 changed file with 11 additions and 2 deletions.
diff --git a/Classes/SBJsonStreamWriter.m b/Classes/SBJsonStreamWriter.m
@@ -34,7 +34,7 @@
 #import "SBJsonStreamWriterState.h"
 
 static NSDecimalNumber *kNotANumber;
-static NSCache *kStaticStringCache;
+static id kStaticStringCache;
 
 
 @implementation SBJsonStreamWriter
@@ -48,7 +48,16 @@ @implementation SBJsonStreamWriter
 
 + (void)initialize {
 	kNotANumber = [NSDecimalNumber notANumber];
-    kStaticStringCache = [[NSCache alloc] init];
+
+    Class cacheClass = NSClassFromString(@"NSCache");
+    if (cacheClass) {
+        NSLog(@"%s NSCache supported", __FUNCTION__);
+        kStaticStringCache = [[cacheClass alloc] init];
+    }else {
+        NSLog(@"%s NSCache not supported", __FUNCTION__);
+    }
+
+
 }
 
 #pragma mark Housekeeping