Enable compiling with ARC and non-ARC

PullToRefreshARCMacros.h

@@ -0,0 +1,66 @@
+//
+//  ARCMacros.h
+//  InnerBand
+//
+// For an explanation of why these work, see:
+//
+//     http://raptureinvenice.com/arc-support-without-branches/
+//
+//  Created by John Blanco on 1/28/12.
+//  Copyright (c) 2012 Rapture In Venice. All rights reserved.
+//
+// NOTE: __bridge_tranfer is not included here because releasing would be inconsistent.
+//       Avoid it unless you're using ARC exclusively or managing it with __has_feature(objc_arc).
+//
+
+#if !defined(__clang__) || __clang_major__ < 3
+    #ifndef __bridge
+        #define __bridge
+    #endif
+
+    #ifndef __bridge_retain
+        #define __bridge_retain
+    #endif
+
+    #ifndef __bridge_retained
+        #define __bridge_retained
+    #endif
+
+    #ifndef __autoreleasing
+        #define __autoreleasing
+    #endif
+
+    #ifndef __strong
+        #define __strong
+    #endif
+
+    #ifndef __unsafe_unretained
+        #define __unsafe_unretained
+    #endif
+
+    #ifndef __weak
+        #define __weak
+    #endif
+#endif
+
+#if __has_feature(objc_arc)
+    #define SAFE_ARC_PROP_RETAIN strong
+    #define SAFE_ARC_RETAIN(x) (x)
+    #define SAFE_ARC_RELEASE(x)
+    #define SAFE_ARC_AUTORELEASE(x) (x)
+    #define SAFE_ARC_BLOCK_COPY(x) (x)
+    #define SAFE_ARC_BLOCK_RELEASE(x)
+    #define SAFE_ARC_SUPER_DEALLOC()
+    #define SAFE_ARC_AUTORELEASE_POOL_START() @autoreleasepool {
+    #define SAFE_ARC_AUTORELEASE_POOL_END() }
+#else
+    #define SAFE_ARC_PROP_RETAIN retain
+    #define SAFE_ARC_RETAIN(x) ([(x) retain])
+    #define SAFE_ARC_RELEASE(x) ([(x) release])
+    #define SAFE_ARC_AUTORELEASE(x) ([(x) autorelease])
+    #define SAFE_ARC_BLOCK_COPY(x) (Block_copy(x))
+    #define SAFE_ARC_BLOCK_RELEASE(x) (Block_release(x))
+    #define SAFE_ARC_SUPER_DEALLOC() ([super dealloc])
+    #define SAFE_ARC_AUTORELEASE_POOL_START() NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
+    #define SAFE_ARC_AUTORELEASE_POOL_END() [pool release];
+#endif

PullToRefreshView.h

@@ -28,6 +28,7 @@
 
 #import <UIKit/UIKit.h>
 #import <QuartzCore/QuartzCore.h>
+#import "PullToRefreshARCMacros.h"
 
 typedef enum {
 	kPullToRefreshViewStateUninitialized = 0,
@@ -41,7 +42,7 @@ typedef enum {
 @protocol PullToRefreshViewDelegate;
 
 @interface PullToRefreshView : UIView {
-	id<PullToRefreshViewDelegate> delegate;
+	__unsafe_unretained id<PullToRefreshViewDelegate> delegate;
 	UIScrollView *scrollView;
 	PullToRefreshViewState state;
 

PullToRefreshView.m

@@ -65,7 +65,7 @@ - (id)initWithScrollView:(UIScrollView *)scroll {
 	CGRect frame = CGRectMake(0.0f, 0.0f - scroll.bounds.size.height, scroll.bounds.size.width, scroll.bounds.size.height);
 
 	if ((self = [super initWithFrame:frame])) {
-		scrollView = [scroll retain];
+		scrollView = SAFE_ARC_RETAIN(scroll);
 		[scrollView addObserver:self forKeyPath:@"contentOffset" options:NSKeyValueObservingOptionNew context:NULL];
 
 		self.autoresizingMask = UIViewAutoresizingFlexibleWidth;
@@ -127,7 +127,7 @@ - (void)refreshLastUpdatedDate {
 	[formatter setPMSymbol:@"PM"];
 	[formatter setDateFormat:@"MM/dd/yy hh:mm a"];
 	subtitleLabel.text = [NSString stringWithFormat:@"Last Updated: %@", [formatter stringFromDate:date]];
-	[formatter release];
+	SAFE_ARC_RELEASE(formatter);
 }
 
 - (void)beginLoading {
@@ -229,7 +229,7 @@ - (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(N
 
 - (void)containingViewDidUnload {
 	[scrollView removeObserver:self forKeyPath:@"contentOffset"];
-	[scrollView release];
+	SAFE_ARC_RELEASE(scrollView);
 	scrollView = nil;
 }
 
@@ -238,14 +238,14 @@ - (void)dealloc {
 
 	if (scrollView != nil) { // probably leaking the scrollView
 		NSLog(@"PullToRefreshView: Leaking a scrollView?");
-		[scrollView release];
+		SAFE_ARC_RELEASE(scrollView);
 	}
 
-	[arrowImage release];
-	[statusLabel release];
-	[subtitleLabel release];
+	SAFE_ARC_RELEASE(arrowImage);
+	SAFE_ARC_RELEASE(statusLabel);
+	SAFE_ARC_RELEASE(subtitleLabel);
 
-	[super dealloc];
+	SAFE_ARC_SUPER_DEALLOC();
 }
 
 @end

README

@@ -4,9 +4,10 @@ It is:
  - a pull-to-refresh implementation
  - very easy to implement
  - doesn't suck
+ - compatable with ARC and non-ARC
 
 To implement it:
- - add the four files (PullToRefreshView.{h,m}, arrow.png and arrow@2x.png) to your project
+ - add the five files (PullToRefreshView.{h,m}, ARCMacros.h, arrow.png and arrow@2x.png) to your project
  - add the Quartz framework to your project if you haven't done so yet
  - #import "PullToRefreshView.h"
  - add QuartzCore to your project