diff --git a/SDWebImage.xcodeproj/project.pbxproj b/SDWebImage.xcodeproj/project.pbxproj
index c4f20796..4be5483c 100644
--- a/SDWebImage.xcodeproj/project.pbxproj
+++ b/SDWebImage.xcodeproj/project.pbxproj
@@ -1095,6 +1095,7 @@
 		4A2CAE131AB4BB5400B6BC39 /* Debug */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				APPLICATION_EXTENSION_API_ONLY = YES;
 				CLANG_CXX_LANGUAGE_STANDARD = "gnu++0x";
 				CLANG_CXX_LIBRARY = "libc++";
 				CLANG_ENABLE_MODULES = YES;
@@ -1141,6 +1142,7 @@
 		4A2CAE141AB4BB5400B6BC39 /* Release */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				APPLICATION_EXTENSION_API_ONLY = YES;
 				CLANG_CXX_LANGUAGE_STANDARD = "gnu++0x";
 				CLANG_CXX_LIBRARY = "libc++";
 				CLANG_ENABLE_MODULES = YES;
@@ -1232,6 +1234,7 @@
 		53761323155AD0D5005750A4 /* Debug */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				APPLICATION_EXTENSION_API_ONLY = NO;
 				CLANG_ENABLE_OBJC_ARC = YES;
 				COPY_PHASE_STRIP = NO;
 				DEAD_CODE_STRIPPING = NO;
@@ -1255,6 +1258,7 @@
 		53761324155AD0D5005750A4 /* Release */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				APPLICATION_EXTENSION_API_ONLY = NO;
 				CLANG_ENABLE_OBJC_ARC = YES;
 				COPY_PHASE_STRIP = NO;
 				DEAD_CODE_STRIPPING = NO;
diff --git a/SDWebImage.xcworkspace/xcshareddata/xcschemes/WebImage.xcscheme b/SDWebImage.xcworkspace/xcshareddata/xcschemes/WebImage.xcscheme
index eff4eec2..20121756 100644
--- a/SDWebImage.xcworkspace/xcshareddata/xcschemes/WebImage.xcscheme
+++ b/SDWebImage.xcworkspace/xcshareddata/xcschemes/WebImage.xcscheme
@@ -20,20 +20,6 @@
                ReferencedContainer = "container:SDWebImage.xcodeproj">
             </BuildableReference>
          </BuildActionEntry>
-         <BuildActionEntry
-            buildForTesting = "YES"
-            buildForRunning = "YES"
-            buildForProfiling = "NO"
-            buildForArchiving = "NO"
-            buildForAnalyzing = "YES">
-            <BuildableReference
-               BuildableIdentifier = "primary"
-               BlueprintIdentifier = "4A2CAE081AB4BB5400B6BC39"
-               BuildableName = "WebImageTests.xctest"
-               BlueprintName = "WebImageTests"
-               ReferencedContainer = "container:SDWebImage.xcodeproj">
-            </BuildableReference>
-         </BuildActionEntry>
       </BuildActionEntries>
    </BuildAction>
    <TestAction
@@ -42,26 +28,7 @@
       shouldUseLaunchSchemeArgsEnv = "YES"
       buildConfiguration = "Debug">
       <Testables>
-         <TestableReference
-            skipped = "NO">
-            <BuildableReference
-               BuildableIdentifier = "primary"
-               BlueprintIdentifier = "4A2CAE081AB4BB5400B6BC39"
-               BuildableName = "WebImageTests.xctest"
-               BlueprintName = "WebImageTests"
-               ReferencedContainer = "container:SDWebImage.xcodeproj">
-            </BuildableReference>
-         </TestableReference>
       </Testables>
-      <MacroExpansion>
-         <BuildableReference
-            BuildableIdentifier = "primary"
-            BlueprintIdentifier = "4A2CADFE1AB4BB5300B6BC39"
-            BuildableName = "WebImage.framework"
-            BlueprintName = "WebImage"
-            ReferencedContainer = "container:SDWebImage.xcodeproj">
-         </BuildableReference>
-      </MacroExpansion>
    </TestAction>
    <LaunchAction
       selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
diff --git a/SDWebImage/SDImageCache.m b/SDWebImage/SDImageCache.m
index dc068d41..c8dddf0f 100644
--- a/SDWebImage/SDImageCache.m
+++ b/SDWebImage/SDImageCache.m
@@ -516,7 +516,11 @@ FOUNDATION_STATIC_INLINE NSUInteger SDCacheCostForImage(UIImage *image) {
 }
 
 - (void)backgroundCleanDisk {
-    UIApplication *application = [UIApplication sharedApplication];
+    Class UIApplicationClass = NSClassFromString(@"UIApplication");
+    if(!UIApplicationClass || ![UIApplicationClass respondsToSelector:@selector(sharedApplication)]) {
+        return;
+    }
+    UIApplication *application = [UIApplication performSelector:@selector(sharedApplication)];
     __block UIBackgroundTaskIdentifier bgTask = [application beginBackgroundTaskWithExpirationHandler:^{
         // Clean up any unfinished task business by marking where you
         // stopped or ending the task outright.
diff --git a/SDWebImage/SDWebImageDownloaderOperation.m b/SDWebImage/SDWebImageDownloaderOperation.m
index ff283459..5a8bd11f 100644
--- a/SDWebImage/SDWebImageDownloaderOperation.m
+++ b/SDWebImage/SDWebImageDownloaderOperation.m
@@ -74,15 +74,18 @@ NSString *const SDWebImageDownloadFinishNotification = @"SDWebImageDownloadFinis
         }
 
 #if TARGET_OS_IPHONE && __IPHONE_OS_VERSION_MAX_ALLOWED >= __IPHONE_4_0
-        if ([self shouldContinueWhenAppEntersBackground]) {
+        Class UIApplicationClass = NSClassFromString(@"UIApplication");
+        BOOL hasApplication = UIApplicationClass && [UIApplicationClass respondsToSelector:@selector(sharedApplication)];
+        if (hasApplication && [self shouldContinueWhenAppEntersBackground]) {
             __weak __typeof__ (self) wself = self;
-            self.backgroundTaskId = [[UIApplication sharedApplication] beginBackgroundTaskWithExpirationHandler:^{
+            UIApplication * app = [UIApplicationClass performSelector:@selector(sharedApplication)];
+            self.backgroundTaskId = [app beginBackgroundTaskWithExpirationHandler:^{
                 __strong __typeof (wself) sself = wself;
 
                 if (sself) {
                     [sself cancel];
 
-                    [[UIApplication sharedApplication] endBackgroundTask:sself.backgroundTaskId];
+                    [app endBackgroundTask:sself.backgroundTaskId];
                     sself.backgroundTaskId = UIBackgroundTaskInvalid;
                 }
             }];
@@ -126,8 +129,13 @@ NSString *const SDWebImageDownloadFinishNotification = @"SDWebImageDownloadFinis
     }
 
 #if TARGET_OS_IPHONE && __IPHONE_OS_VERSION_MAX_ALLOWED >= __IPHONE_4_0
+    Class UIApplicationClass = NSClassFromString(@"UIApplication");
+    if(!UIApplicationClass || ![UIApplicationClass respondsToSelector:@selector(sharedApplication)]) {
+        return;
+    }
     if (self.backgroundTaskId != UIBackgroundTaskInvalid) {
-        [[UIApplication sharedApplication] endBackgroundTask:self.backgroundTaskId];
+        UIApplication * app = [UIApplication performSelector:@selector(sharedApplication)];
+        [app endBackgroundTask:self.backgroundTaskId];
         self.backgroundTaskId = UIBackgroundTaskInvalid;
     }
 #endif