├── README.md
├── TestAsync
    ├── TestAsync.xcodeproj
    │   ├── project.pbxproj
    │   └── xcuserdata
    │   │   └── wenjin.xcuserdatad
    │   │       ├── xcdebugger
    │   │           └── Breakpoints_v2.xcbkptlist
    │   │       └── xcschemes
    │   │           └── TestAsync.xcscheme
    └── TestAsync
    │   ├── AppDelegate.swift
    │   ├── Assets.xcassets
    │       └── AppIcon.appiconset
    │       │   └── Contents.json
    │   ├── Base.lproj
    │       ├── LaunchScreen.storyboard
    │       └── Main.storyboard
    │   ├── Info.plist
    │   └── ViewController.swift
└── functional async.pdf


/README.md:
--------------------------------------------------------------------------------
1 | # functional_async_demo
2 | solve async problem in functional way
3 | 


--------------------------------------------------------------------------------
/TestAsync/TestAsync.xcodeproj/project.pbxproj:
--------------------------------------------------------------------------------
  1 | // !$*UTF8*$!
  2 | {
  3 | 	archiveVersion = 1;
  4 | 	classes = {
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  6 | 	objectVersion = 46;
  7 | 	objects = {
  8 | 
  9 | /* Begin PBXBuildFile section */
 10 | 		BC469BC21D6DE57D00E509E8 /* AppDelegate.swift in Sources */ = {isa = PBXBuildFile; fileRef = BC469BC11D6DE57D00E509E8 /* AppDelegate.swift */; };
 11 | 		BC469BC41D6DE57D00E509E8 /* ViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = BC469BC31D6DE57D00E509E8 /* ViewController.swift */; };
 12 | 		BC469BC71D6DE57D00E509E8 /* Main.storyboard in Resources */ = {isa = PBXBuildFile; fileRef = BC469BC51D6DE57D00E509E8 /* Main.storyboard */; };
 13 | 		BC469BC91D6DE57D00E509E8 /* Assets.xcassets in Resources */ = {isa = PBXBuildFile; fileRef = BC469BC81D6DE57D00E509E8 /* Assets.xcassets */; };
 14 | 		BC469BCC1D6DE57D00E509E8 /* LaunchScreen.storyboard in Resources */ = {isa = PBXBuildFile; fileRef = BC469BCA1D6DE57D00E509E8 /* LaunchScreen.storyboard */; };
 15 | /* End PBXBuildFile section */
 16 | 
 17 | /* Begin PBXFileReference section */
 18 | 		BC469BBE1D6DE57C00E509E8 /* TestAsync.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = TestAsync.app; sourceTree = BUILT_PRODUCTS_DIR; };
 19 | 		BC469BC11D6DE57D00E509E8 /* AppDelegate.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = AppDelegate.swift; sourceTree = "<group>"; };
 20 | 		BC469BC31D6DE57D00E509E8 /* ViewController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ViewController.swift; sourceTree = "<group>"; };
 21 | 		BC469BC61D6DE57D00E509E8 /* Base */ = {isa = PBXFileReference; lastKnownFileType = file.storyboard; name = Base; path = Base.lproj/Main.storyboard; sourceTree = "<group>"; };
 22 | 		BC469BC81D6DE57D00E509E8 /* Assets.xcassets */ = {isa = PBXFileReference; lastKnownFileType = folder.assetcatalog; path = Assets.xcassets; sourceTree = "<group>"; };
 23 | 		BC469BCB1D6DE57D00E509E8 /* Base */ = {isa = PBXFileReference; lastKnownFileType = file.storyboard; name = Base; path = Base.lproj/LaunchScreen.storyboard; sourceTree = "<group>"; };
 24 | 		BC469BCD1D6DE57D00E509E8 /* Info.plist */ = {isa = PBXFileReference; lastKnownFileType = text.plist.xml; path = Info.plist; sourceTree = "<group>"; };
 25 | /* End PBXFileReference section */
 26 | 
 27 | /* Begin PBXFrameworksBuildPhase section */
 28 | 		BC469BBB1D6DE57C00E509E8 /* Frameworks */ = {
 29 | 			isa = PBXFrameworksBuildPhase;
 30 | 			buildActionMask = 2147483647;
 31 | 			files = (
 32 | 			);
 33 | 			runOnlyForDeploymentPostprocessing = 0;
 34 | 		};
 35 | /* End PBXFrameworksBuildPhase section */
 36 | 
 37 | /* Begin PBXGroup section */
 38 | 		BC469BB51D6DE57C00E509E8 = {
 39 | 			isa = PBXGroup;
 40 | 			children = (
 41 | 				BC469BC01D6DE57C00E509E8 /* TestAsync */,
 42 | 				BC469BBF1D6DE57C00E509E8 /* Products */,
 43 | 			);
 44 | 			sourceTree = "<group>";
 45 | 		};
 46 | 		BC469BBF1D6DE57C00E509E8 /* Products */ = {
 47 | 			isa = PBXGroup;
 48 | 			children = (
 49 | 				BC469BBE1D6DE57C00E509E8 /* TestAsync.app */,
 50 | 			);
 51 | 			name = Products;
 52 | 			sourceTree = "<group>";
 53 | 		};
 54 | 		BC469BC01D6DE57C00E509E8 /* TestAsync */ = {
 55 | 			isa = PBXGroup;
 56 | 			children = (
 57 | 				BC469BC11D6DE57D00E509E8 /* AppDelegate.swift */,
 58 | 				BC469BC31D6DE57D00E509E8 /* ViewController.swift */,
 59 | 				BC469BC51D6DE57D00E509E8 /* Main.storyboard */,
 60 | 				BC469BC81D6DE57D00E509E8 /* Assets.xcassets */,
 61 | 				BC469BCA1D6DE57D00E509E8 /* LaunchScreen.storyboard */,
 62 | 				BC469BCD1D6DE57D00E509E8 /* Info.plist */,
 63 | 			);
 64 | 			path = TestAsync;
 65 | 			sourceTree = "<group>";
 66 | 		};
 67 | /* End PBXGroup section */
 68 | 
 69 | /* Begin PBXNativeTarget section */
 70 | 		BC469BBD1D6DE57C00E509E8 /* TestAsync */ = {
 71 | 			isa = PBXNativeTarget;
 72 | 			buildConfigurationList = BC469BD01D6DE57D00E509E8 /* Build configuration list for PBXNativeTarget "TestAsync" */;
 73 | 			buildPhases = (
 74 | 				BC469BBA1D6DE57C00E509E8 /* Sources */,
 75 | 				BC469BBB1D6DE57C00E509E8 /* Frameworks */,
 76 | 				BC469BBC1D6DE57C00E509E8 /* Resources */,
 77 | 			);
 78 | 			buildRules = (
 79 | 			);
 80 | 			dependencies = (
 81 | 			);
 82 | 			name = TestAsync;
 83 | 			productName = TestAsync;
 84 | 			productReference = BC469BBE1D6DE57C00E509E8 /* TestAsync.app */;
 85 | 			productType = "com.apple.product-type.application";
 86 | 		};
 87 | /* End PBXNativeTarget section */
 88 | 
 89 | /* Begin PBXProject section */
 90 | 		BC469BB61D6DE57C00E509E8 /* Project object */ = {
 91 | 			isa = PBXProject;
 92 | 			attributes = {
 93 | 				LastSwiftUpdateCheck = 0730;
 94 | 				LastUpgradeCheck = 0730;
 95 | 				ORGANIZATIONNAME = wenjin;
 96 | 				TargetAttributes = {
 97 | 					BC469BBD1D6DE57C00E509E8 = {
 98 | 						CreatedOnToolsVersion = 7.3.1;
 99 | 						LastSwiftMigration = 0820;
100 | 					};
101 | 				};
102 | 			};
103 | 			buildConfigurationList = BC469BB91D6DE57C00E509E8 /* Build configuration list for PBXProject "TestAsync" */;
104 | 			compatibilityVersion = "Xcode 3.2";
105 | 			developmentRegion = English;
106 | 			hasScannedForEncodings = 0;
107 | 			knownRegions = (
108 | 				en,
109 | 				Base,
110 | 			);
111 | 			mainGroup = BC469BB51D6DE57C00E509E8;
112 | 			productRefGroup = BC469BBF1D6DE57C00E509E8 /* Products */;
113 | 			projectDirPath = "";
114 | 			projectRoot = "";
115 | 			targets = (
116 | 				BC469BBD1D6DE57C00E509E8 /* TestAsync */,
117 | 			);
118 | 		};
119 | /* End PBXProject section */
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121 | /* Begin PBXResourcesBuildPhase section */
122 | 		BC469BBC1D6DE57C00E509E8 /* Resources */ = {
123 | 			isa = PBXResourcesBuildPhase;
124 | 			buildActionMask = 2147483647;
125 | 			files = (
126 | 				BC469BCC1D6DE57D00E509E8 /* LaunchScreen.storyboard in Resources */,
127 | 				BC469BC91D6DE57D00E509E8 /* Assets.xcassets in Resources */,
128 | 				BC469BC71D6DE57D00E509E8 /* Main.storyboard in Resources */,
129 | 			);
130 | 			runOnlyForDeploymentPostprocessing = 0;
131 | 		};
132 | /* End PBXResourcesBuildPhase section */
133 | 
134 | /* Begin PBXSourcesBuildPhase section */
135 | 		BC469BBA1D6DE57C00E509E8 /* Sources */ = {
136 | 			isa = PBXSourcesBuildPhase;
137 | 			buildActionMask = 2147483647;
138 | 			files = (
139 | 				BC469BC41D6DE57D00E509E8 /* ViewController.swift in Sources */,
140 | 				BC469BC21D6DE57D00E509E8 /* AppDelegate.swift in Sources */,
141 | 			);
142 | 			runOnlyForDeploymentPostprocessing = 0;
143 | 		};
144 | /* End PBXSourcesBuildPhase section */
145 | 
146 | /* Begin PBXVariantGroup section */
147 | 		BC469BC51D6DE57D00E509E8 /* Main.storyboard */ = {
148 | 			isa = PBXVariantGroup;
149 | 			children = (
150 | 				BC469BC61D6DE57D00E509E8 /* Base */,
151 | 			);
152 | 			name = Main.storyboard;
153 | 			sourceTree = "<group>";
154 | 		};
155 | 		BC469BCA1D6DE57D00E509E8 /* LaunchScreen.storyboard */ = {
156 | 			isa = PBXVariantGroup;
157 | 			children = (
158 | 				BC469BCB1D6DE57D00E509E8 /* Base */,
159 | 			);
160 | 			name = LaunchScreen.storyboard;
161 | 			sourceTree = "<group>";
162 | 		};
163 | /* End PBXVariantGroup section */
164 | 
165 | /* Begin XCBuildConfiguration section */
166 | 		BC469BCE1D6DE57D00E509E8 /* Debug */ = {
167 | 			isa = XCBuildConfiguration;
168 | 			buildSettings = {
169 | 				ALWAYS_SEARCH_USER_PATHS = NO;
170 | 				CLANG_ANALYZER_NONNULL = YES;
171 | 				CLANG_CXX_LANGUAGE_STANDARD = "gnu++0x";
172 | 				CLANG_CXX_LIBRARY = "libc++";
173 | 				CLANG_ENABLE_MODULES = YES;
174 | 				CLANG_ENABLE_OBJC_ARC = YES;
175 | 				CLANG_WARN_BOOL_CONVERSION = YES;
176 | 				CLANG_WARN_CONSTANT_CONVERSION = YES;
177 | 				CLANG_WARN_DIRECT_OBJC_ISA_USAGE = YES_ERROR;
178 | 				CLANG_WARN_EMPTY_BODY = YES;
179 | 				CLANG_WARN_ENUM_CONVERSION = YES;
180 | 				CLANG_WARN_INT_CONVERSION = YES;
181 | 				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
182 | 				CLANG_WARN_UNREACHABLE_CODE = YES;
183 | 				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
184 | 				"CODE_SIGN_IDENTITY[sdk=iphoneos*]" = "iPhone Developer";
185 | 				COPY_PHASE_STRIP = NO;
186 | 				DEBUG_INFORMATION_FORMAT = dwarf;
187 | 				ENABLE_STRICT_OBJC_MSGSEND = YES;
188 | 				ENABLE_TESTABILITY = YES;
189 | 				GCC_C_LANGUAGE_STANDARD = gnu99;
190 | 				GCC_DYNAMIC_NO_PIC = NO;
191 | 				GCC_NO_COMMON_BLOCKS = YES;
192 | 				GCC_OPTIMIZATION_LEVEL = 0;
193 | 				GCC_PREPROCESSOR_DEFINITIONS = (
194 | 					"DEBUG=1",
195 | 					"$(inherited)",
196 | 				);
197 | 				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
198 | 				GCC_WARN_ABOUT_RETURN_TYPE = YES_ERROR;
199 | 				GCC_WARN_UNDECLARED_SELECTOR = YES;
200 | 				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
201 | 				GCC_WARN_UNUSED_FUNCTION = YES;
202 | 				GCC_WARN_UNUSED_VARIABLE = YES;
203 | 				IPHONEOS_DEPLOYMENT_TARGET = 9.3;
204 | 				MTL_ENABLE_DEBUG_INFO = YES;
205 | 				ONLY_ACTIVE_ARCH = YES;
206 | 				SDKROOT = iphoneos;
207 | 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
208 | 			};
209 | 			name = Debug;
210 | 		};
211 | 		BC469BCF1D6DE57D00E509E8 /* Release */ = {
212 | 			isa = XCBuildConfiguration;
213 | 			buildSettings = {
214 | 				ALWAYS_SEARCH_USER_PATHS = NO;
215 | 				CLANG_ANALYZER_NONNULL = YES;
216 | 				CLANG_CXX_LANGUAGE_STANDARD = "gnu++0x";
217 | 				CLANG_CXX_LIBRARY = "libc++";
218 | 				CLANG_ENABLE_MODULES = YES;
219 | 				CLANG_ENABLE_OBJC_ARC = YES;
220 | 				CLANG_WARN_BOOL_CONVERSION = YES;
221 | 				CLANG_WARN_CONSTANT_CONVERSION = YES;
222 | 				CLANG_WARN_DIRECT_OBJC_ISA_USAGE = YES_ERROR;
223 | 				CLANG_WARN_EMPTY_BODY = YES;
224 | 				CLANG_WARN_ENUM_CONVERSION = YES;
225 | 				CLANG_WARN_INT_CONVERSION = YES;
226 | 				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
227 | 				CLANG_WARN_UNREACHABLE_CODE = YES;
228 | 				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
229 | 				"CODE_SIGN_IDENTITY[sdk=iphoneos*]" = "iPhone Developer";
230 | 				COPY_PHASE_STRIP = NO;
231 | 				DEBUG_INFORMATION_FORMAT = "dwarf-with-dsym";
232 | 				ENABLE_NS_ASSERTIONS = NO;
233 | 				ENABLE_STRICT_OBJC_MSGSEND = YES;
234 | 				GCC_C_LANGUAGE_STANDARD = gnu99;
235 | 				GCC_NO_COMMON_BLOCKS = YES;
236 | 				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
237 | 				GCC_WARN_ABOUT_RETURN_TYPE = YES_ERROR;
238 | 				GCC_WARN_UNDECLARED_SELECTOR = YES;
239 | 				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
240 | 				GCC_WARN_UNUSED_FUNCTION = YES;
241 | 				GCC_WARN_UNUSED_VARIABLE = YES;
242 | 				IPHONEOS_DEPLOYMENT_TARGET = 9.3;
243 | 				MTL_ENABLE_DEBUG_INFO = NO;
244 | 				SDKROOT = iphoneos;
245 | 				VALIDATE_PRODUCT = YES;
246 | 			};
247 | 			name = Release;
248 | 		};
249 | 		BC469BD11D6DE57D00E509E8 /* Debug */ = {
250 | 			isa = XCBuildConfiguration;
251 | 			buildSettings = {
252 | 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
253 | 				INFOPLIST_FILE = TestAsync/Info.plist;
254 | 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks";
255 | 				PRODUCT_BUNDLE_IDENTIFIER = s.TestAsync;
256 | 				PRODUCT_NAME = "$(TARGET_NAME)";
257 | 				SWIFT_VERSION = 3.0;
258 | 			};
259 | 			name = Debug;
260 | 		};
261 | 		BC469BD21D6DE57D00E509E8 /* Release */ = {
262 | 			isa = XCBuildConfiguration;
263 | 			buildSettings = {
264 | 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
265 | 				INFOPLIST_FILE = TestAsync/Info.plist;
266 | 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks";
267 | 				PRODUCT_BUNDLE_IDENTIFIER = s.TestAsync;
268 | 				PRODUCT_NAME = "$(TARGET_NAME)";
269 | 				SWIFT_VERSION = 3.0;
270 | 			};
271 | 			name = Release;
272 | 		};
273 | /* End XCBuildConfiguration section */
274 | 
275 | /* Begin XCConfigurationList section */
276 | 		BC469BB91D6DE57C00E509E8 /* Build configuration list for PBXProject "TestAsync" */ = {
277 | 			isa = XCConfigurationList;
278 | 			buildConfigurations = (
279 | 				BC469BCE1D6DE57D00E509E8 /* Debug */,
280 | 				BC469BCF1D6DE57D00E509E8 /* Release */,
281 | 			);
282 | 			defaultConfigurationIsVisible = 0;
283 | 			defaultConfigurationName = Release;
284 | 		};
285 | 		BC469BD01D6DE57D00E509E8 /* Build configuration list for PBXNativeTarget "TestAsync" */ = {
286 | 			isa = XCConfigurationList;
287 | 			buildConfigurations = (
288 | 				BC469BD11D6DE57D00E509E8 /* Debug */,
289 | 				BC469BD21D6DE57D00E509E8 /* Release */,
290 | 			);
291 | 			defaultConfigurationIsVisible = 0;
292 | 			defaultConfigurationName = Release;
293 | 		};
294 | /* End XCConfigurationList section */
295 | 	};
296 | 	rootObject = BC469BB61D6DE57C00E509E8 /* Project object */;
297 | }
298 | 


--------------------------------------------------------------------------------
/TestAsync/TestAsync.xcodeproj/xcuserdata/wenjin.xcuserdatad/xcdebugger/Breakpoints_v2.xcbkptlist:
--------------------------------------------------------------------------------
1 | <?xml version="1.0" encoding="UTF-8"?>
2 | <Bucket
3 |    type = "1"
4 |    version = "2.0">
5 | </Bucket>
6 | 


--------------------------------------------------------------------------------
/TestAsync/TestAsync.xcodeproj/xcuserdata/wenjin.xcuserdatad/xcschemes/TestAsync.xcscheme:
--------------------------------------------------------------------------------
 1 | <?xml version="1.0" encoding="UTF-8"?>
 2 | <Scheme
 3 |    LastUpgradeVersion = "0730"
 4 |    version = "1.3">
 5 |    <BuildAction
 6 |       parallelizeBuildables = "YES"
 7 |       buildImplicitDependencies = "YES">
 8 |       <BuildActionEntries>
 9 |          <BuildActionEntry
10 |             buildForTesting = "YES"
11 |             buildForRunning = "YES"
12 |             buildForProfiling = "YES"
13 |             buildForArchiving = "YES"
14 |             buildForAnalyzing = "YES">
15 |             <BuildableReference
16 |                BuildableIdentifier = "primary"
17 |                BlueprintIdentifier = "BC469BBD1D6DE57C00E509E8"
18 |                BuildableName = "TestAsync.app"
19 |                BlueprintName = "TestAsync"
20 |                ReferencedContainer = "container:TestAsync.xcodeproj">
21 |             </BuildableReference>
22 |          </BuildActionEntry>
23 |       </BuildActionEntries>
24 |    </BuildAction>
25 |    <TestAction
26 |       buildConfiguration = "Debug"
27 |       selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
28 |       selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
29 |       shouldUseLaunchSchemeArgsEnv = "YES">
30 |       <Testables>
31 |       </Testables>
32 |       <MacroExpansion>
33 |          <BuildableReference
34 |             BuildableIdentifier = "primary"
35 |             BlueprintIdentifier = "BC469BBD1D6DE57C00E509E8"
36 |             BuildableName = "TestAsync.app"
37 |             BlueprintName = "TestAsync"
38 |             ReferencedContainer = "container:TestAsync.xcodeproj">
39 |          </BuildableReference>
40 |       </MacroExpansion>
41 |       <AdditionalOptions>
42 |       </AdditionalOptions>
43 |    </TestAction>
44 |    <LaunchAction
45 |       buildConfiguration = "Debug"
46 |       selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
47 |       selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
48 |       launchStyle = "0"
49 |       useCustomWorkingDirectory = "NO"
50 |       ignoresPersistentStateOnLaunch = "NO"
51 |       debugDocumentVersioning = "YES"
52 |       debugServiceExtension = "internal"
53 |       allowLocationSimulation = "YES">
54 |       <BuildableProductRunnable
55 |          runnableDebuggingMode = "0">
56 |          <BuildableReference
57 |             BuildableIdentifier = "primary"
58 |             BlueprintIdentifier = "BC469BBD1D6DE57C00E509E8"
59 |             BuildableName = "TestAsync.app"
60 |             BlueprintName = "TestAsync"
61 |             ReferencedContainer = "container:TestAsync.xcodeproj">
62 |          </BuildableReference>
63 |       </BuildableProductRunnable>
64 |       <AdditionalOptions>
65 |       </AdditionalOptions>
66 |    </LaunchAction>
67 |    <ProfileAction
68 |       buildConfiguration = "Release"
69 |       shouldUseLaunchSchemeArgsEnv = "YES"
70 |       savedToolIdentifier = ""
71 |       useCustomWorkingDirectory = "NO"
72 |       debugDocumentVersioning = "YES">
73 |       <BuildableProductRunnable
74 |          runnableDebuggingMode = "0">
75 |          <BuildableReference
76 |             BuildableIdentifier = "primary"
77 |             BlueprintIdentifier = "BC469BBD1D6DE57C00E509E8"
78 |             BuildableName = "TestAsync.app"
79 |             BlueprintName = "TestAsync"
80 |             ReferencedContainer = "container:TestAsync.xcodeproj">
81 |          </BuildableReference>
82 |       </BuildableProductRunnable>
83 |    </ProfileAction>
84 |    <AnalyzeAction
85 |       buildConfiguration = "Debug">
86 |    </AnalyzeAction>
87 |    <ArchiveAction
88 |       buildConfiguration = "Release"
89 |       revealArchiveInOrganizer = "YES">
90 |    </ArchiveAction>
91 | </Scheme>
92 | 


--------------------------------------------------------------------------------
/TestAsync/TestAsync/AppDelegate.swift:
--------------------------------------------------------------------------------
 1 | //
 2 | //  AppDelegate.swift
 3 | //  TestAsync
 4 | //
 5 | //  Created by wenjin on 8/24/16.
 6 | //  Copyright © 2016 wenjin. All rights reserved.
 7 | //
 8 | 
 9 | import UIKit
10 | 
11 | @UIApplicationMain
12 | class AppDelegate: UIResponder, UIApplicationDelegate {
13 | 
14 |     var window: UIWindow?
15 | 
16 | 
17 |     func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
18 |         // Override point for customization after application launch.
19 |         return true
20 |     }
21 | 
22 |     func applicationWillResignActive(_ application: UIApplication) {
23 |         // Sent when the application is about to move from active to inactive state. This can occur for certain types of temporary interruptions (such as an incoming phone call or SMS message) or when the user quits the application and it begins the transition to the background state.
24 |         // Use this method to pause ongoing tasks, disable timers, and throttle down OpenGL ES frame rates. Games should use this method to pause the game.
25 |     }
26 | 
27 |     func applicationDidEnterBackground(_ application: UIApplication) {
28 |         // Use this method to release shared resources, save user data, invalidate timers, and store enough application state information to restore your application to its current state in case it is terminated later.
29 |         // If your application supports background execution, this method is called instead of applicationWillTerminate: when the user quits.
30 |     }
31 | 
32 |     func applicationWillEnterForeground(_ application: UIApplication) {
33 |         // Called as part of the transition from the background to the inactive state; here you can undo many of the changes made on entering the background.
34 |     }
35 | 
36 |     func applicationDidBecomeActive(_ application: UIApplication) {
37 |         // Restart any tasks that were paused (or not yet started) while the application was inactive. If the application was previously in the background, optionally refresh the user interface.
38 |     }
39 | 
40 |     func applicationWillTerminate(_ application: UIApplication) {
41 |         // Called when the application is about to terminate. Save data if appropriate. See also applicationDidEnterBackground:.
42 |     }
43 | 
44 | 
45 | }
46 | 
47 | 


--------------------------------------------------------------------------------
/TestAsync/TestAsync/Assets.xcassets/AppIcon.appiconset/Contents.json:
--------------------------------------------------------------------------------
 1 | {
 2 |   "images" : [
 3 |     {
 4 |       "idiom" : "iphone",
 5 |       "size" : "29x29",
 6 |       "scale" : "2x"
 7 |     },
 8 |     {
 9 |       "idiom" : "iphone",
10 |       "size" : "29x29",
11 |       "scale" : "3x"
12 |     },
13 |     {
14 |       "idiom" : "iphone",
15 |       "size" : "40x40",
16 |       "scale" : "2x"
17 |     },
18 |     {
19 |       "idiom" : "iphone",
20 |       "size" : "40x40",
21 |       "scale" : "3x"
22 |     },
23 |     {
24 |       "idiom" : "iphone",
25 |       "size" : "60x60",
26 |       "scale" : "2x"
27 |     },
28 |     {
29 |       "idiom" : "iphone",
30 |       "size" : "60x60",
31 |       "scale" : "3x"
32 |     }
33 |   ],
34 |   "info" : {
35 |     "version" : 1,
36 |     "author" : "xcode"
37 |   }
38 | }


--------------------------------------------------------------------------------
/TestAsync/TestAsync/Base.lproj/LaunchScreen.storyboard:
--------------------------------------------------------------------------------
 1 | <?xml version="1.0" encoding="UTF-8" standalone="no"?>
 2 | <document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="8150" systemVersion="15A204g" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" launchScreen="YES" useTraitCollections="YES" initialViewController="01J-lp-oVM">
 3 |     <dependencies>
 4 |         <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="8122"/>
 5 |     </dependencies>
 6 |     <scenes>
 7 |         <!--View Controller-->
 8 |         <scene sceneID="EHf-IW-A2E">
 9 |             <objects>
10 |                 <viewController id="01J-lp-oVM" sceneMemberID="viewController">
11 |                     <layoutGuides>
12 |                         <viewControllerLayoutGuide type="top" id="Llm-lL-Icb"/>
13 |                         <viewControllerLayoutGuide type="bottom" id="xb3-aO-Qok"/>
14 |                     </layoutGuides>
15 |                     <view key="view" contentMode="scaleToFill" id="Ze5-6b-2t3">
16 |                         <rect key="frame" x="0.0" y="0.0" width="600" height="600"/>
17 |                         <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
18 |                         <animations/>
19 |                         <color key="backgroundColor" white="1" alpha="1" colorSpace="custom" customColorSpace="calibratedWhite"/>
20 |                     </view>
21 |                 </viewController>
22 |                 <placeholder placeholderIdentifier="IBFirstResponder" id="iYj-Kq-Ea1" userLabel="First Responder" sceneMemberID="firstResponder"/>
23 |             </objects>
24 |             <point key="canvasLocation" x="53" y="375"/>
25 |         </scene>
26 |     </scenes>
27 | </document>
28 | 


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/TestAsync/TestAsync/Base.lproj/Main.storyboard:
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 1 | <?xml version="1.0" encoding="UTF-8" standalone="no"?>
 2 | <document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="10117" systemVersion="15D21" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" initialViewController="BYZ-38-t0r">
 3 |     <dependencies>
 4 |         <deployment identifier="iOS"/>
 5 |         <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="10085"/>
 6 |     </dependencies>
 7 |     <scenes>
 8 |         <!--View Controller-->
 9 |         <scene sceneID="tne-QT-ifu">
10 |             <objects>
11 |                 <viewController id="BYZ-38-t0r" customClass="ViewController" customModule="TestAsync" customModuleProvider="target" sceneMemberID="viewController">
12 |                     <layoutGuides>
13 |                         <viewControllerLayoutGuide type="top" id="y3c-jy-aDJ"/>
14 |                         <viewControllerLayoutGuide type="bottom" id="wfy-db-euE"/>
15 |                     </layoutGuides>
16 |                     <view key="view" contentMode="scaleToFill" id="8bC-Xf-vdC">
17 |                         <rect key="frame" x="0.0" y="0.0" width="600" height="600"/>
18 |                         <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
19 |                         <color key="backgroundColor" white="1" alpha="1" colorSpace="custom" customColorSpace="calibratedWhite"/>
20 |                     </view>
21 |                 </viewController>
22 |                 <placeholder placeholderIdentifier="IBFirstResponder" id="dkx-z0-nzr" sceneMemberID="firstResponder"/>
23 |             </objects>
24 |         </scene>
25 |     </scenes>
26 | </document>
27 | 


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/TestAsync/TestAsync/Info.plist:
--------------------------------------------------------------------------------
 1 | <?xml version="1.0" encoding="UTF-8"?>
 2 | <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
 3 | <plist version="1.0">
 4 | <dict>
 5 | 	<key>CFBundleDevelopmentRegion</key>
 6 | 	<string>en</string>
 7 | 	<key>CFBundleExecutable</key>
 8 | 	<string>$(EXECUTABLE_NAME)</string>
 9 | 	<key>CFBundleIdentifier</key>
10 | 	<string>$(PRODUCT_BUNDLE_IDENTIFIER)</string>
11 | 	<key>CFBundleInfoDictionaryVersion</key>
12 | 	<string>6.0</string>
13 | 	<key>CFBundleName</key>
14 | 	<string>$(PRODUCT_NAME)</string>
15 | 	<key>CFBundlePackageType</key>
16 | 	<string>APPL</string>
17 | 	<key>CFBundleShortVersionString</key>
18 | 	<string>1.0</string>
19 | 	<key>CFBundleSignature</key>
20 | 	<string>????</string>
21 | 	<key>CFBundleVersion</key>
22 | 	<string>1</string>
23 | 	<key>LSRequiresIPhoneOS</key>
24 | 	<true/>
25 | 	<key>UILaunchStoryboardName</key>
26 | 	<string>LaunchScreen</string>
27 | 	<key>UIMainStoryboardFile</key>
28 | 	<string>Main</string>
29 | 	<key>UIRequiredDeviceCapabilities</key>
30 | 	<array>
31 | 		<string>armv7</string>
32 | 	</array>
33 | 	<key>UISupportedInterfaceOrientations</key>
34 | 	<array>
35 | 		<string>UIInterfaceOrientationPortrait</string>
36 | 		<string>UIInterfaceOrientationLandscapeLeft</string>
37 | 		<string>UIInterfaceOrientationLandscapeRight</string>
38 | 	</array>
39 | </dict>
40 | </plist>
41 | 


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/TestAsync/TestAsync/ViewController.swift:
--------------------------------------------------------------------------------
  1 | //
  2 | //  ViewController.swift
  3 | //  TestAsync
  4 | //
  5 | //  Created by wenjin on 8/24/16.
  6 | //  Copyright © 2016 wenjin. All rights reserved.
  7 | //
  8 | 
  9 | import UIKit
 10 | typealias AsyncFunc = (_ info : AnyObject,_ complete:(AnyObject?,NSError?)->Void) -> Void
 11 | 
 12 | 
 13 | infix operator <> {associativity left precedence 150}
 14 | infix operator +> {associativity left precedence 150}
 15 | 
 16 | 
 17 | func +>(left : @escaping AsyncFunc , right : @escaping AsyncFunc) -> AsyncFunc{
 18 |     return { info , complete in
 19 |         left(info){ result,error in
 20 |             guard error == nil else{
 21 |                 complete(nil,error)
 22 |                 return
 23 |             }
 24 |             right(info){result,error in
 25 |                 complete(result,error)
 26 |             }
 27 |         }
 28 |     }
 29 | }
 30 | 
 31 | func <>(left : @escaping AsyncFunc , right : @escaping AsyncFunc) -> AsyncFunc{
 32 |     return { info, complete in
 33 |         
 34 |         var leftComplete = false
 35 |         var rightComplete = false
 36 |         var finishedComplete = false
 37 |         
 38 |         var leftResult:AnyObject? = nil
 39 |         var rightResult:AnyObject? = nil
 40 |         
 41 |         let checkComplete = {
 42 |             print ("checking")
 43 |             if leftComplete && rightComplete{
 44 |                 objc_sync_enter(finishedComplete)
 45 |                 if !finishedComplete{
 46 |                     let finalResult:[AnyObject] = [leftResult!, rightResult!]
 47 |                     complete(finalResult as AnyObject?, nil)
 48 |                     finishedComplete = true
 49 |                 }
 50 |                 objc_sync_exit(finishedComplete)
 51 |             }
 52 |         }
 53 |         
 54 |         left(info){result,error in
 55 |             guard error == nil else{
 56 |                 complete(nil, error)
 57 |                 return
 58 |             }
 59 | 
 60 |             leftComplete = true
 61 |             leftResult = result;
 62 |             checkComplete()
 63 |         }
 64 |         
 65 |         right(info){result,error in
 66 |             guard error == nil else{
 67 |                 complete(nil, error)
 68 |                 return
 69 |             }
 70 | 
 71 |             rightComplete = true
 72 |             rightResult = result;
 73 |             checkComplete()
 74 |         }
 75 |     }
 76 | }
 77 | 
 78 | class Promise {
 79 |     var chain : AsyncFunc
 80 |     var alwaysClosure : ((Void)->Void)?
 81 |     var errorClosure : ((NSError?)->Void)?
 82 |     
 83 |     init(starter : @escaping AsyncFunc){
 84 |         chain = starter
 85 |     }
 86 |     
 87 |     func then(_ body : @escaping (AnyObject) throws->Void )->Promise{
 88 |         let async: AsyncFunc = { info, complete in
 89 |             DispatchQueue.global(priority: DispatchQueue.GlobalQueuePriority.default).async {
 90 |                 var error : NSError?
 91 |                 do{
 92 |                     try body(info)
 93 |                 }catch let err as NSError{
 94 |                     error = err
 95 |                 }
 96 |                 complete(0 as AnyObject?,error)
 97 |             }
 98 |         }
 99 |         chain = chain +> async
100 |         return self
101 |     }
102 |     
103 |     func always(_ closure : @escaping (Void)->Void)->Promise{
104 |         alwaysClosure = closure
105 |         return self
106 |     }
107 |     
108 |     func error(_ closure : @escaping (NSError?)->Void)->Promise{
109 |         errorClosure = closure
110 |         fire()
111 |         return self
112 |     }
113 |     
114 |     func fire(){
115 |         chain(0 as AnyObject) { (info, error) in
116 |             if let always = self.alwaysClosure{
117 |                 always()
118 |             }
119 |             
120 |             if error == nil{
121 |                 print("all task finished")
122 |             }else{
123 |                 if let errorC = self.errorClosure{
124 |                     errorC(error)
125 |                 }
126 |             }
127 |         }
128 |     }
129 | }
130 | 
131 | func firstly(_ body : @escaping (Void)->Void)->Promise{
132 |     
133 |     let starter: AsyncFunc = { _,complete in
134 |         DispatchQueue.global(priority: DispatchQueue.GlobalQueuePriority.default).async {
135 |             body();
136 |             complete(0 as AnyObject?,nil);
137 |         }
138 |     }
139 | 
140 |     return Promise(starter: starter)
141 | }
142 | 
143 | func when(_ fstBody : @escaping ((Void)->Void), sndBody : @escaping ((Void)->Void)){
144 |     let async1 : AsyncFunc = { _ , complete in
145 |         DispatchQueue.global(priority: DispatchQueue.GlobalQueuePriority.default).async {
146 |             fstBody();
147 |             complete(0 as AnyObject?,nil);
148 |         }
149 |     }
150 |     
151 |     let async2 : AsyncFunc = { _ , complete in
152 |         DispatchQueue.global(priority: DispatchQueue.GlobalQueuePriority.default).async {
153 |             sndBody();
154 |             complete(0 as AnyObject?,nil);
155 |         }
156 |     }
157 |     
158 |     let async = async1 <> async2
159 |     
160 |     var finished = false
161 |     
162 |     async(0 as AnyObject) { (_, _) in
163 |         finished = true
164 |     }
165 |     
166 |     while finished == false {
167 |         
168 |     }
169 | }
170 | 
171 | class ViewController: UIViewController {
172 | 
173 |     override func viewDidLoad() {
174 |         super.viewDidLoad()
175 |         
176 |         firstly { () in
177 |             when({ () in
178 |                 print ("begin fst job")
179 |                 sleep(1)
180 |                 print("fst job in when finished")
181 |                 }, sndBody: { () in
182 |                     print ("begin snd job")
183 |                     sleep(5)
184 |                     print("snd job in when finished")
185 |             })
186 |         }.then { (info) in
187 |             print("second job")
188 |             throw NSError(domain: "error", code: 0, userInfo: [:])
189 |         }.then { (info) in
190 |             print("third job")
191 |         }.always { () in
192 |             print("always block")
193 |         }.error { (error) in
194 |             print("error occurred")
195 |         }
196 |     }
197 | 
198 |     override func didReceiveMemoryWarning() {
199 |         super.didReceiveMemoryWarning()
200 |         // Dispose of any resources that can be recreated.
201 |     }
202 | 
203 | 
204 | }
205 | 
206 | 


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/functional async.pdf:
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https://raw.githubusercontent.com/aaaron7/functional_async_demo/4d85369ecb10b908e4fd79e29d093d644f9d4995/functional async.pdf


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