diff --git a/.DS_Store b/.DS_Store
index 5e564f4..7995e47 100644
Binary files a/.DS_Store and b/.DS_Store differ
diff --git a/EBBannerView/Classes/EBBannerView+Categories.m b/EBBannerView/Classes/EBBannerView+Categories.m
index fefb246..eba3f40 100644
--- a/EBBannerView/Classes/EBBannerView+Categories.m
+++ b/EBBannerView/Classes/EBBannerView+Categories.m
@@ -76,6 +76,7 @@ +(UIColor *)colorAtPoint:(CGPoint)point{
     CGImageRef cgImage = viewImage.CGImage;
     NSUInteger width = viewImage.size.width;
     NSUInteger height = viewImage.size.height;
+    viewImage = nil;
     CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();
     int bytesPerPixel = 4;
     int bytesPerRow = bytesPerPixel * 1;
@@ -86,6 +87,7 @@ +(UIColor *)colorAtPoint:(CGPoint)point{
     CGContextSetBlendMode(context, kCGBlendModeCopy);
     CGContextTranslateCTM(context, -pointX, pointY-(CGFloat)height);
     CGContextDrawImage(context, CGRectMake(0.0f, 0.0f, (CGFloat)width, (CGFloat)height), cgImage);
+    UIGraphicsEndImageContext();
     CGContextRelease(context);
     CGFloat red = (CGFloat)pixelData[0] / 255.0f;
     CGFloat green = (CGFloat)pixelData[1] / 255.0f;
diff --git a/demo/demo.xcworkspace/xcuserdata/wxc.xcuserdatad/UserInterfaceState.xcuserstate b/demo/demo.xcworkspace/xcuserdata/wxc.xcuserdatad/UserInterfaceState.xcuserstate
index e268ef9..6dbe5a0 100644
Binary files a/demo/demo.xcworkspace/xcuserdata/wxc.xcuserdatad/UserInterfaceState.xcuserstate and b/demo/demo.xcworkspace/xcuserdata/wxc.xcuserdatad/UserInterfaceState.xcuserstate differ