Fixes warning: 'macro' is not defined, evaluates to 0

AFNetworking/AFImageRequestOperation.h

@@ -25,9 +25,9 @@
 
 #import <Availability.h>
 
-#if __IPHONE_OS_VERSION_MIN_REQUIRED
+#if defined(__IPHONE_OS_VERSION_MIN_REQUIRED)
 #import <UIKit/UIKit.h>
-#elif __MAC_OS_X_VERSION_MIN_REQUIRED 
+#elif defined(__MAC_OS_X_VERSION_MIN_REQUIRED)
 #import <Cocoa/Cocoa.h>
 #endif
 
@@ -54,13 +54,13 @@
 /**
  An image constructed from the response data. If an error occurs during the request, `nil` will be returned, and the `error` property will be set to the error.
  */
-#if __IPHONE_OS_VERSION_MIN_REQUIRED
+#if defined(__IPHONE_OS_VERSION_MIN_REQUIRED)
 @property (readonly, nonatomic, strong) UIImage *responseImage;
-#elif __MAC_OS_X_VERSION_MIN_REQUIRED
+#elif defined(__MAC_OS_X_VERSION_MIN_REQUIRED)
 @property (readonly, nonatomic, strong) NSImage *responseImage;
 #endif
 
-#if __IPHONE_OS_VERSION_MIN_REQUIRED
+#if defined(__IPHONE_OS_VERSION_MIN_REQUIRED)
 /**
  The scale factor used when interpreting the image data to construct `responseImage`. Specifying a scale factor of 1.0 results in an image whose size matches the pixel-based dimensions of the image. Applying a different scale factor changes the size of the image as reported by the size property. This is set to the value of scale of the main screen by default, which automatically scales images for retina displays, for instance.
  */
@@ -75,10 +75,10 @@
  
  @return A new image request operation
  */
-#if __IPHONE_OS_VERSION_MIN_REQUIRED
+#if defined(__IPHONE_OS_VERSION_MIN_REQUIRED)
 + (AFImageRequestOperation *)imageRequestOperationWithRequest:(NSURLRequest *)urlRequest                
                                                       success:(void (^)(UIImage *image))success;
-#elif __MAC_OS_X_VERSION_MIN_REQUIRED
+#elif defined(__MAC_OS_X_VERSION_MIN_REQUIRED)
 + (AFImageRequestOperation *)imageRequestOperationWithRequest:(NSURLRequest *)urlRequest                
                                                       success:(void (^)(NSImage *image))success;
 #endif
@@ -93,12 +93,12 @@
  
  @return A new image request operation
  */
-#if __IPHONE_OS_VERSION_MIN_REQUIRED
+#ifdef __IPHONE_OS_VERSION_MIN_REQUIRED
 + (AFImageRequestOperation *)imageRequestOperationWithRequest:(NSURLRequest *)urlRequest
                                          imageProcessingBlock:(UIImage *(^)(UIImage *image))imageProcessingBlock
                                                       success:(void (^)(NSURLRequest *request, NSHTTPURLResponse *response, UIImage *image))success
                                                       failure:(void (^)(NSURLRequest *request, NSHTTPURLResponse *response, NSError *error))failure;
-#elif __MAC_OS_X_VERSION_MIN_REQUIRED
+#elifdef __MAC_OS_X_VERSION_MIN_REQUIRED
 + (AFImageRequestOperation *)imageRequestOperationWithRequest:(NSURLRequest *)urlRequest
                                          imageProcessingBlock:(NSImage *(^)(NSImage *image))imageProcessingBlock
                                                       success:(void (^)(NSURLRequest *request, NSHTTPURLResponse *response, NSImage *image))success

AFNetworking/AFNetworkActivityIndicatorManager.h

@@ -24,7 +24,7 @@
 
 #import <Availability.h>
 
-#if __IPHONE_OS_VERSION_MIN_REQUIRED
+#if defined(__IPHONE_OS_VERSION_MIN_REQUIRED)
 #import <UIKit/UIKit.h>
 
 /**

AFNetworking/AFNetworkActivityIndicatorManager.m

@@ -24,7 +24,7 @@
 
 #import "AFHTTPRequestOperation.h"
 
-#if __IPHONE_OS_VERSION_MIN_REQUIRED
+#if defined(__IPHONE_OS_VERSION_MIN_REQUIRED)
 static NSTimeInterval const kAFNetworkActivityIndicatorInvisibilityDelay = 0.17;
 
 @interface AFNetworkActivityIndicatorManager ()

AFNetworking/AFURLConnectionOperation.h

@@ -184,7 +184,7 @@
  
  @param handler A handler to be called shortly before the application’s remaining background time reaches 0. The handler is wrapped in a block that cancels the operation, and cleans up and marks the end of execution, unlike the `handler` parameter in `UIApplication -beginBackgroundTaskWithExpirationHandler:`, which expects this to be done in the handler itself. The handler is called synchronously on the main thread, thus blocking the application’s suspension momentarily while the application is notified. 
  */
-#if __IPHONE_OS_VERSION_MIN_REQUIRED
+#if defined(__IPHONE_OS_VERSION_MIN_REQUIRED)
 - (void)setShouldExecuteAsBackgroundTaskWithExpirationHandler:(void (^)(void))handler;
 #endif
 

AFNetworking/AFURLConnectionOperation.m

@@ -21,7 +21,7 @@
 // THE SOFTWARE.
 
 #import "AFURLConnectionOperation.h"
-#if __IPHONE_OS_VERSION_MIN_REQUIRED
+#if defined(__IPHONE_OS_VERSION_MIN_REQUIRED)
 #import <UIKit/UIKit.h>
 #endif
 
@@ -39,7 +39,7 @@ typedef enum {
 
 typedef signed short AFOperationState;
 
-#if __IPHONE_OS_VERSION_MIN_REQUIRED
+#if defined(__IPHONE_OS_VERSION_MIN_REQUIRED)
 typedef UIBackgroundTaskIdentifier AFBackgroundTaskIdentifier;
 #else
 typedef id AFBackgroundTaskIdentifier;
@@ -196,7 +196,7 @@ static inline BOOL AFStateTransitionIsValid(AFOperationState fromState, AFOperat
         _outputStream = nil;
     }
 
-#if __IPHONE_OS_VERSION_MIN_REQUIRED
+#if defined(__IPHONE_OS_VERSION_MIN_REQUIRED)
     if (_backgroundTaskIdentifier) {
         [[UIApplication sharedApplication] endBackgroundTask:_backgroundTaskIdentifier];
         _backgroundTaskIdentifier = UIBackgroundTaskInvalid;
@@ -249,7 +249,7 @@ static inline BOOL AFStateTransitionIsValid(AFOperationState fromState, AFOperat
     [self didChangeValueForKey:@"outputStream"];
 }
 
-#if __IPHONE_OS_VERSION_MIN_REQUIRED
+#if defined(__IPHONE_OS_VERSION_MIN_REQUIRED)
 - (void)setShouldExecuteAsBackgroundTaskWithExpirationHandler:(void (^)(void))handler {
     [self.lock lock];
     if (!self.backgroundTaskIdentifier) {    

AFNetworking/UIImageView+AFNetworking.m

@@ -23,7 +23,7 @@
 #import <Foundation/Foundation.h>
 #import <objc/runtime.h>
 
-#if __IPHONE_OS_VERSION_MIN_REQUIRED
+#if defined(__IPHONE_OS_VERSION_MIN_REQUIRED)
 #import "UIImageView+AFNetworking.h"
 
 @interface AFImageCache : NSCache