diff --git a/WTRequestCenter.xcodeproj/project.pbxproj b/WTRequestCenter.xcodeproj/project.pbxproj
index 5b9bfe6..04a28b6 100644
--- a/WTRequestCenter.xcodeproj/project.pbxproj
+++ b/WTRequestCenter.xcodeproj/project.pbxproj
@@ -7,9 +7,9 @@
 	objects = {
 
 /* Begin PBXBuildFile section */
-		A3B70EFC198888BC002776F4 /* UIImageView+WTImageCache.m in Sources */ = {isa = PBXBuildFile; fileRef = A3B70EFB198888BC002776F4 /* UIImageView+WTImageCache.m */; };
 		A3B70F591988BDFA002776F4 /* image.jpg in Resources */ = {isa = PBXBuildFile; fileRef = A3B70F581988BDFA002776F4 /* image.jpg */; };
-		A3B70F5E1988DB9F002776F4 /* UIButton+WTImageCache.m in Sources */ = {isa = PBXBuildFile; fileRef = A3B70F5D1988DB9F002776F4 /* UIButton+WTImageCache.m */; };
+		A3B70F641988DC5B002776F4 /* UIButton+WTImageCache.m in Sources */ = {isa = PBXBuildFile; fileRef = A3B70F611988DC5B002776F4 /* UIButton+WTImageCache.m */; };
+		A3B70F651988DC5B002776F4 /* UIImageView+WTImageCache.m in Sources */ = {isa = PBXBuildFile; fileRef = A3B70F631988DC5B002776F4 /* UIImageView+WTImageCache.m */; };
 		E4440D71197A01B1001E6D88 /* Foundation.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = E4440D70197A01B1001E6D88 /* Foundation.framework */; };
 		E4440D73197A01B1001E6D88 /* CoreGraphics.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = E4440D72197A01B1001E6D88 /* CoreGraphics.framework */; };
 		E4440D75197A01B1001E6D88 /* UIKit.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = E4440D74197A01B1001E6D88 /* UIKit.framework */; };
@@ -38,11 +38,11 @@
 /* End PBXContainerItemProxy section */
 
 /* Begin PBXFileReference section */
-		A3B70EFA198888BC002776F4 /* UIImageView+WTImageCache.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = "UIImageView+WTImageCache.h"; sourceTree = "<group>"; };
-		A3B70EFB198888BC002776F4 /* UIImageView+WTImageCache.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = "UIImageView+WTImageCache.m"; sourceTree = "<group>"; };
 		A3B70F581988BDFA002776F4 /* image.jpg */ = {isa = PBXFileReference; lastKnownFileType = image.jpeg; path = image.jpg; sourceTree = "<group>"; };
-		A3B70F5C1988DB9F002776F4 /* UIButton+WTImageCache.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = "UIButton+WTImageCache.h"; sourceTree = "<group>"; };
-		A3B70F5D1988DB9F002776F4 /* UIButton+WTImageCache.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = "UIButton+WTImageCache.m"; sourceTree = "<group>"; };
+		A3B70F601988DC5B002776F4 /* UIButton+WTImageCache.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = "UIButton+WTImageCache.h"; sourceTree = "<group>"; };
+		A3B70F611988DC5B002776F4 /* UIButton+WTImageCache.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = "UIButton+WTImageCache.m"; sourceTree = "<group>"; };
+		A3B70F621988DC5B002776F4 /* UIImageView+WTImageCache.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = "UIImageView+WTImageCache.h"; sourceTree = "<group>"; };
+		A3B70F631988DC5B002776F4 /* UIImageView+WTImageCache.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = "UIImageView+WTImageCache.m"; sourceTree = "<group>"; };
 		E4440D6D197A01B1001E6D88 /* WTRequestCenter.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = WTRequestCenter.app; sourceTree = BUILT_PRODUCTS_DIR; };
 		E4440D70197A01B1001E6D88 /* Foundation.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = Foundation.framework; path = System/Library/Frameworks/Foundation.framework; sourceTree = SDKROOT; };
 		E4440D72197A01B1001E6D88 /* CoreGraphics.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = CoreGraphics.framework; path = System/Library/Frameworks/CoreGraphics.framework; sourceTree = SDKROOT; };
@@ -90,10 +90,23 @@
 /* End PBXFrameworksBuildPhase section */
 
 /* Begin PBXGroup section */
+		A3B70F5F1988DC5B002776F4 /* UIKit+WTRequestCenter */ = {
+			isa = PBXGroup;
+			children = (
+				A3B70F601988DC5B002776F4 /* UIButton+WTImageCache.h */,
+				A3B70F611988DC5B002776F4 /* UIButton+WTImageCache.m */,
+				A3B70F621988DC5B002776F4 /* UIImageView+WTImageCache.h */,
+				A3B70F631988DC5B002776F4 /* UIImageView+WTImageCache.m */,
+			);
+			name = "UIKit+WTRequestCenter";
+			path = "WTRequestCenter/UIKit+WTRequestCenter";
+			sourceTree = "<group>";
+		};
 		E4440D64197A01B1001E6D88 = {
 			isa = PBXGroup;
 			children = (
 				E4DBC941197D14C9004F9393 /* WTRequestCenter */,
+				A3B70F5F1988DC5B002776F4 /* UIKit+WTRequestCenter */,
 				E4440D76197A01B1001E6D88 /* WTRequestCenter */,
 				E4440D95197A01B1001E6D88 /* WTRequestCenterTests */,
 				E4440D6F197A01B1001E6D88 /* Frameworks */,
@@ -170,10 +183,6 @@
 			children = (
 				E4DBC942197D14F3004F9393 /* WTRequestCenter.h */,
 				E4DBC943197D14F3004F9393 /* WTRequestCenter.m */,
-				A3B70EFA198888BC002776F4 /* UIImageView+WTImageCache.h */,
-				A3B70EFB198888BC002776F4 /* UIImageView+WTImageCache.m */,
-				A3B70F5C1988DB9F002776F4 /* UIButton+WTImageCache.h */,
-				A3B70F5D1988DB9F002776F4 /* UIButton+WTImageCache.m */,
 			);
 			name = WTRequestCenter;
 			path = WTRequestCenter/WTRequestCenter;
@@ -277,12 +286,12 @@
 			isa = PBXSourcesBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
-				A3B70EFC198888BC002776F4 /* UIImageView+WTImageCache.m in Sources */,
+				A3B70F651988DC5B002776F4 /* UIImageView+WTImageCache.m in Sources */,
 				E4440D87197A01B1001E6D88 /* ViewController.m in Sources */,
 				E4DBC944197D14F3004F9393 /* WTRequestCenter.m in Sources */,
 				E4440D81197A01B1001E6D88 /* AppDelegate.m in Sources */,
 				E4440D7D197A01B1001E6D88 /* main.m in Sources */,
-				A3B70F5E1988DB9F002776F4 /* UIButton+WTImageCache.m in Sources */,
+				A3B70F641988DC5B002776F4 /* UIButton+WTImageCache.m in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
diff --git a/WTRequestCenter.xcodeproj/project.xcworkspace/xcuserdata/songwt.xcuserdatad/UserInterfaceState.xcuserstate b/WTRequestCenter.xcodeproj/project.xcworkspace/xcuserdata/songwt.xcuserdatad/UserInterfaceState.xcuserstate
index 9604524..13a58a6 100644
Binary files a/WTRequestCenter.xcodeproj/project.xcworkspace/xcuserdata/songwt.xcuserdatad/UserInterfaceState.xcuserstate and b/WTRequestCenter.xcodeproj/project.xcworkspace/xcuserdata/songwt.xcuserdatad/UserInterfaceState.xcuserstate differ
diff --git a/WTRequestCenter/WTRequestCenter/UIButton+WTImageCache.h b/WTRequestCenter/UIKit+WTRequestCenter/UIButton+WTImageCache.h
similarity index 100%
rename from WTRequestCenter/WTRequestCenter/UIButton+WTImageCache.h
rename to WTRequestCenter/UIKit+WTRequestCenter/UIButton+WTImageCache.h
diff --git a/WTRequestCenter/WTRequestCenter/UIButton+WTImageCache.m b/WTRequestCenter/UIKit+WTRequestCenter/UIButton+WTImageCache.m
similarity index 100%
rename from WTRequestCenter/WTRequestCenter/UIButton+WTImageCache.m
rename to WTRequestCenter/UIKit+WTRequestCenter/UIButton+WTImageCache.m
diff --git a/WTRequestCenter/WTRequestCenter/UIImageView+WTImageCache.h b/WTRequestCenter/UIKit+WTRequestCenter/UIImageView+WTImageCache.h
similarity index 100%
rename from WTRequestCenter/WTRequestCenter/UIImageView+WTImageCache.h
rename to WTRequestCenter/UIKit+WTRequestCenter/UIImageView+WTImageCache.h
diff --git a/WTRequestCenter/WTRequestCenter/UIImageView+WTImageCache.m b/WTRequestCenter/UIKit+WTRequestCenter/UIImageView+WTImageCache.m
similarity index 100%
rename from WTRequestCenter/WTRequestCenter/UIImageView+WTImageCache.m
rename to WTRequestCenter/UIKit+WTRequestCenter/UIImageView+WTImageCache.m