Add SPM support

Package.swift

@@ -0,0 +1,42 @@
+// swift-tools-version:5.0
+// The swift-tools-version declares the minimum version of Swift required to build this package.
+
+import PackageDescription
+
+let package = Package(
+    name: "SDWebImageFLPlugin",
+    platforms: [
+        .iOS(.v9),
+    ],
+    products: [
+        // Products define the executables and libraries produced by a package, and make them visible to other packages.
+        .library(
+            name: "SDWebImageFLPlugin",
+            targets: ["SDWebImageFLPlugin"]
+        )
+    ],
+    dependencies: [
+        .package(
+            url: "https://github.com/SDWebImage/SDWebImage.git",
+            from: "5.10.0"
+        ),
+        .package(
+            url: "https://github.com/Flipboard/FLAnimatedImage.git",
+            from: "1.0.11"
+        )
+    ],
+    targets: [
+        // Targets are the basic building blocks of a package. A target can define a module or a test suite.
+        // Targets can depend on other targets in this package, and on products in packages which this package depends on.
+        .target(
+            name: "SDWebImageFLPlugin",
+            dependencies: ["SDWebImage", "FLAnimatedImage"],
+            path: "SDWebImageFLPlugin",
+            sources: ["Classes/FLAnimatedImageBridge"],
+            publicHeadersPath: "Modules",
+            cSettings: [
+                .headerSearchPath("Modules")
+            ]
+        )
+    ]
+)

SDWebImageFLPlugin/Classes/FLAnimatedImageBridge/FLAnimatedImageView+WebCache.h

@@ -6,8 +6,16 @@
  * file that was distributed with this source code.
  */
 
+#if __has_include(<SDWebImage/SDWebImage.h>)
 #import <SDWebImage/SDWebImage.h>
+#else
+@import SDWebImage;
+#endif
+#if __has_include(<FLAnimatedImage/FLAnimatedImage.h>)
 #import <FLAnimatedImage/FLAnimatedImage.h>
+#else
+@import FLAnimatedImage;
+#endif
 #import "SDFLAnimatedImage.h"
 
 /**

SDWebImageFLPlugin/Classes/FLAnimatedImageBridge/SDFLAnimatedImage.h

@@ -6,8 +6,16 @@
  * file that was distributed with this source code.
  */
 
-#import <FLAnimatedImage/FLAnimatedImage.h>
+#if __has_include(<SDWebImage/SDWebImage.h>)
 #import <SDWebImage/SDWebImage.h>
+#else
+@import SDWebImage;
+#endif
+#if __has_include(<FLAnimatedImage/FLAnimatedImage.h>)
+#import <FLAnimatedImage/FLAnimatedImage.h>
+#else
+@import FLAnimatedImage;
+#endif
 
 /**
  * Optimal frame cache size of FLAnimatedImage during initializer. (1.0.11 version later)

SDWebImageFLPlugin/Module/SDWebImageFLPlugin.h

@@ -13,7 +13,6 @@
 #import <SDWebImageFLPlugin/FLAnimatedImageView+WebCache.h>
 #import <SDWebImageFLPlugin/SDFLAnimatedImage.h>
 
-
 FOUNDATION_EXPORT double SDWebImageFLPluginVersionNumber;
 FOUNDATION_EXPORT const unsigned char SDWebImageFLPluginVersionString[];