intari · February 16, 2016 12:15 · Aug 4, 2014 · Apr 2, 2014
diff --git a/Singleton.m b/Singleton.m
@@ -7,13 +7,15 @@ + (instancetype) sharedInstance {
     static dispatch_once_t onceToken;
     dispatch_once(&onceToken, ^{
         sharedInstance = [[super alloc] initInstance];
-        // Do any other initialisation stuff here
     });
     return sharedInstance;
 }
 
 - (instancetype) initInstance {
-    return [super init];
+    self = [super init];
+    // Do any other initialisation stuff here
+    // ...
+    return self;
 }
 
 // ...

diff --git a/Singleton.h b/Singleton.h
@@ -0,0 +1,13 @@
+@interface MySingleton : NSObject
+
+// ...
+
++ (instancetype) sharedInstance;
+
++ (instancetype) alloc  __attribute__((unavailable("alloc not available, call sharedInstance instead")));
+- (instancetype) init   __attribute__((unavailable("init not available, call sharedInstance instead")));
++ (instancetype) new    __attribute__((unavailable("new not available, call sharedInstance instead")));
+
+// ...
+
+@end
diff --git a/Singleton.m b/Singleton.m
@@ -0,0 +1,21 @@
+@implimentation MySingleton
+
+// ...
+
++ (instancetype) sharedInstance {
+    static id sharedInstance = nil;
+    static dispatch_once_t onceToken;
+    dispatch_once(&onceToken, ^{
+        sharedInstance = [[super alloc] initInstance];
+        // Do any other initialisation stuff here
+    });
+    return sharedInstance;
+}
+
+- (instancetype) initInstance {
+    return [super init];
+}
+
+// ...
+
+@end