| 
 | 1 | +## [4.1.1 - 4.1 patch, on Oct 6th, 2017](https://github.com/rs/SDWebImage/releases/tag/4.1.1)  | 
 | 2 | +See [all tickets marked for the 4.1.1 release](https://github.com/rs/SDWebImage/milestone/14)  | 
 | 3 | + | 
 | 4 | +#### Fixes  | 
 | 5 | + | 
 | 6 | +- Fixed crash on `[SDWebImageDownloaderOperation reset]_block_invoke` 2f892f9 fixes #1883  | 
 | 7 | +- Fixed `SDWebImageDownloadOperation` `imageData` multi-thread issue #2011 fixes #1998 `[SDWebImageDownloaderOperation URLSession:dataTask:didReceiveData:]` crash  | 
 | 8 | +- Fixed `CFRelease` on `NULL` if `CGImageSourceRef` create failed #1978 fixes #1968 #1834 #1947  | 
 | 9 | +- Fixed request cache policy #1994 #2032 fixes #1993 #1861 #1623 was introduced by #1737 (unit test #2031)  | 
 | 10 | +- Fixed `CGBitmapContextCreate` bitmap memory leak #1976 replaces #1860 fixes #1974  | 
 | 11 | +- Fixed issue #2001, add `sd_currentBackgroundImageURL` and `sd_backgroundImageURLForState:` for `UIButton` #2002  | 
 | 12 | +- Set `UIButton` placeholer-image even if the url is `nil` #2043 fixes #1721 #1964 replaces #1790  | 
 | 13 | +- Use `CGImageSourceCreateIncremental` to perform progressive decoding instead of decode partial data each time from the beginning to improve performance and remove that gray background #2040 fixes #1899  | 
 | 14 | +- Fix *SDWebImage v4* can not import *libwebp* framework's header files #1983 fixes #1887  | 
 | 15 | +- Fix unreachable code build warning on `macOS` #1984  | 
 | 16 | + | 
 | 17 | +#### Improvements  | 
 | 18 | + | 
 | 19 | +- Performance enhancement related to single `WebP` and animated `WebP` decoding #1985 fixes #1999 #1885  | 
 | 20 | +- Use `FOUNDATION_EXPORT` over `extern` #1977  | 
 | 21 | +- Move common test logic to `SDTestCase` #1980  | 
 | 22 | +- Enabled `CLANG_WARN_STRICT_PROTOTYPES` #1995 #2027 fixes #2022  | 
 | 23 | +- Update `macOS Demo` deployment target to `10.10` to support build on `Xcode 9` #2035  | 
 | 24 | + | 
 | 25 | +#### Docs  | 
 | 26 | + | 
 | 27 | +- Updated *Manual Installation* section #2030 fixes #2012  | 
 | 28 | + | 
1 | 29 | ## [4.1.0 - Swift API cleanup, on Jul 31st, 2017](https://github.com/rs/SDWebImage/releases/tag/4.1.0)  | 
2 | 30 | See [all tickets marked for the 4.1.0 release](https://github.com/rs/SDWebImage/milestone/13)  | 
3 | 31 | 
 
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