Added macOS Demo for webp encoding test

Author: dreampiggy

Example/SDWebImageWebPCoderExample-macOS/AppDelegate.h

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+/*
+ * This file is part of the SDWebImage package.
+ * (c) DreamPiggy <[email protected]>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+#import <Cocoa/Cocoa.h>
+
+@interface AppDelegate : NSObject <NSApplicationDelegate>
+
+
+@end
+

Example/SDWebImageWebPCoderExample-macOS/AppDelegate.m

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+/*
+ * This file is part of the SDWebImage package.
+ * (c) DreamPiggy <[email protected]>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+#import "AppDelegate.h"
+
+@interface AppDelegate ()
+
+
+@end
+
+@implementation AppDelegate
+
+- (void)applicationDidFinishLaunching:(NSNotification *)aNotification {
+    // Insert code here to initialize your application
+}
+
+
+- (void)applicationWillTerminate:(NSNotification *)aNotification {
+    // Insert code here to tear down your application
+}
+
+
+- (BOOL)applicationSupportsSecureRestorableState:(NSApplication *)app {
+    return YES;
+}
+
+
+@end

Example/SDWebImageWebPCoderExample-macOS/Assets.xcassets/AccentColor.colorset/Contents.json

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+{
+  "colors" : [
+    {
+      "idiom" : "universal"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

Example/SDWebImageWebPCoderExample-macOS/Assets.xcassets/AppIcon.appiconset/Contents.json

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+{
+  "images" : [
+    {
+      "idiom" : "mac",
+      "scale" : "1x",
+      "size" : "16x16"
+    },
+    {
+      "idiom" : "mac",
+      "scale" : "2x",
+      "size" : "16x16"
+    },
+    {
+      "idiom" : "mac",
+      "scale" : "1x",
+      "size" : "32x32"
+    },
+    {
+      "idiom" : "mac",
+      "scale" : "2x",
+      "size" : "32x32"
+    },
+    {
+      "idiom" : "mac",
+      "scale" : "1x",
+      "size" : "128x128"
+    },
+    {
+      "idiom" : "mac",
+      "scale" : "2x",
+      "size" : "128x128"
+    },
+    {
+      "idiom" : "mac",
+      "scale" : "1x",
+      "size" : "256x256"
+    },
+    {
+      "idiom" : "mac",
+      "scale" : "2x",
+      "size" : "256x256"
+    },
+    {
+      "idiom" : "mac",
+      "scale" : "1x",
+      "size" : "512x512"
+    },
+    {
+      "idiom" : "mac",
+      "scale" : "2x",
+      "size" : "512x512"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

Example/SDWebImageWebPCoderExample-macOS/Assets.xcassets/Contents.json

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+{
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

Example/SDWebImageWebPCoderExample-macOS/Base.lproj/Main.storyboard

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+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict/>
+</plist>

Example/SDWebImageWebPCoderExample-macOS/SDWebImageWebPCoderExample_macOS.entitlements

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+/*
+ * This file is part of the SDWebImage package.
+ * (c) DreamPiggy <[email protected]>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+#import <Cocoa/Cocoa.h>
+
+@interface ViewController : NSViewController
+
+
+@end
+

Example/SDWebImageWebPCoderExample-macOS/ViewController.h

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+/*
+ * This file is part of the SDWebImage package.
+ * (c) DreamPiggy <[email protected]>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+#import "ViewController.h"
+#import <SDWebImageWebPCoder/SDWebImageWebPCoder.h>
+#import <SDWebImage/SDWebImage.h>
+
+@implementation ViewController
+
+- (void)viewDidLoad {
+    [super viewDidLoad];
+
+    // Test transcoding
+    NSString *jpegPath = [NSBundle.mainBundle pathForResource:@"before.jpeg" ofType:nil inDirectory:@"examples/pexels-egor-kamelev-920163"];
+    NSData *jpegData = [NSData dataWithContentsOfFile:jpegPath];
+    NSImage *jpegImage = [[NSImage alloc] initWithData:jpegData];
+    
+    NSData *webpData = [[SDImageWebPCoder sharedCoder] encodedDataWithImage:jpegImage format:SDImageFormatWebP options:nil];
+    NSString  *webpPath = [[jpegPath stringByDeletingLastPathComponent] stringByAppendingPathComponent:@"after.webp"];
+    BOOL success = [webpData writeToFile:webpPath atomically:YES];
+    NSAssert(success, @"Encode WebP success");
+}
+
+
+- (void)setRepresentedObject:(id)representedObject {
+    [super setRepresentedObject:representedObject];
+
+    // Update the view, if already loaded.
+}
+
+
+@end