15 handle memory warnings

- use app Delegate instead notification centre
lamlee · Feb 21, 2012 · f3cdf78 · f3cdf78
1 parent dbef498
commit f3cdf78
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diff --git a/15-SavingLoadingAndMultitasking/Homepwner/AppDelegate.m b/15-SavingLoadingAndMultitasking/Homepwner/AppDelegate.m
@@ -9,6 +9,7 @@
 #import "AppDelegate.h"
 #import "ItemsViewController.h"
 #import "PosessionStore.h"
+#import "ImageStore.h"
 
 @implementation AppDelegate
 
@@ -39,4 +40,9 @@ -(void)applicationWillTerminate:(UIApplication *)application {
 //    [self applicationDidEnterBackground:application];
 }
 
+-(void)applicationDidReceiveMemoryWarning:(UIApplication *)application {
+    NSLog(@"Received mem warning");
+    [ImageStore.defaultStore clearCache];
+}
+
 @end
diff --git a/15-SavingLoadingAndMultitasking/Homepwner/ImageStore.h b/15-SavingLoadingAndMultitasking/Homepwner/ImageStore.h
@@ -18,5 +18,6 @@
 -(void)setImage:(UIImage *)i forKey:(NSString *)s;
 -(UIImage *)imageForKey:(NSString *)s;
 -(void)deleteImageForKey:(NSString *)s;
+-(void)clearCache;
 
 @end
diff --git a/15-SavingLoadingAndMultitasking/Homepwner/ImageStore.m b/15-SavingLoadingAndMultitasking/Homepwner/ImageStore.m
@@ -52,6 +52,11 @@ -(void)deleteImageForKey:(NSString *)s
     [NSFileManager.defaultManager removeItemAtPath:path error:NULL];
 }
 
+-(void)clearCache {
+    NSLog(@"[ImageStore] clearCache");
+    [dict removeAllObjects];
+}
+
 
 // init
 - (id)init {