ios / yh_sdwebimage · Commits

- open the decoding/encoding procedures to the users
- switch from hardcoded decoding/encoding to pluginable decoders/encoders (builtin + user created)
- `SDWebImageCodersManager` is a singleton holding an array of `SDImageCoder` (protocol). Even though a singleton is not necesarily a good pattern, in this case it eliminates dealing with passing this array around
- uses a priority queue behind scenes, which means the latest added coders have priority.
- the priority is crucial when encoding/decoding something, we go through the list and ask each coder if they can handle the current data (see `canDecodeFromData:`, `canEncodeToFormat:`, `canIncrementallyDecodeFromData:`)
- each coder must conform to this protocol `SDImageCoder` describing all the required behavior for a coder
- we provide 3 built-in coders: `SDWebImageImageIOCoder` (for JPEG, PNG, TIFF), `SDWebImageGIFCoder` (for GIF), `SDWebImageWebPCoder` (for WebP and animated WebP)
- the user of SDWebImage can create custom coders by conforming to `SDImageCoder` and adding the coders to `SDWebImageCodersManager`. See `addCoder:` or `removeCoder:` or `coders` getter to get the array
- in order to preserve backwards compatibility, the UIImage categories were preserved, calling the new coders APIs described above

Fix unreachable code warning because of the return and break expression in #if SD_MAC

use NSImage built-in method to maintain GIF on macOS
update README

Clarified and simplified the usage of TARGET_OS_* macros. Added SD_MAC, SD_UIKIT, SD_IOS, SD_TV, SD_WATCH.
Updated Travis CI

…ork (pod lib lint works).
There is an issue, the SDWebImage watchOS target doesn't show the simulator, only Generic Device.
Also need to add some demo and test code.

# Conflicts:
#	SDWebImage.xcodeproj/project.pbxproj

…with a single animated frame (basically a static image). We do set it in the images array so we can distinguish between those and real static images. Dropped all other GIF code.

Don’t add nil to the array, just skip the frame.

…ix (deprecated the old ones)
-there were a few exceptions where I just renamed the methods since they were added in this method

Remove GIF specific code from main source, isolate it in a UIImage category to ease future addition of format support