├── .gitignore ├── .swift-version ├── KeypathObserver.podspec ├── KeypathObserver.xcodeproj ├── project.pbxproj ├── project.xcworkspace │ └── contents.xcworkspacedata └── xcshareddata │ └── xcschemes │ └── KeypathObserver.xcscheme ├── KeypathObserver ├── Info.plist └── KeypathObserver.h ├── KeypathObserverTests ├── Info.plist └── KeypathObserverTests.swift ├── LICENSE ├── Package.swift ├── README.md └── Sources └── KeypathObserver.swift /.gitignore: -------------------------------------------------------------------------------- 1 | 2 | # macOS 3 | .DS_Store 4 | 5 | # Xcode 6 | # 7 | # gitignore contributors: remember to update Global/Xcode.gitignore, Objective-C.gitignore & Swift.gitignore 8 | 9 | ## Build generated 10 | build/ 11 | DerivedData/ 12 | 13 | ## Various settings 14 | *.pbxuser 15 | !default.pbxuser 16 | *.mode1v3 17 | !default.mode1v3 18 | *.mode2v3 19 | !default.mode2v3 20 | *.perspectivev3 21 | !default.perspectivev3 22 | xcuserdata/ 23 | 24 | ## Other 25 | *.moved-aside 26 | *.xcuserstate 27 | 28 | ## Obj-C/Swift specific 29 | *.hmap 30 | *.ipa 31 | *.dSYM.zip 32 | *.dSYM 33 | 34 | ## Playgrounds 35 | timeline.xctimeline 36 | playground.xcworkspace 37 | 38 | # Swift Package Manager 39 | Packages/ 40 | .build/ 41 | 42 | # CocoaPods 43 | Pods/ 44 | 45 | # Carthage 46 | Carthage/Checkouts 47 | Carthage/Build 48 | 49 | # fastlane 50 | fastlane/report.xml 51 | fastlane/Preview.html 52 | fastlane/screenshots 53 | fastlane/test_output 54 | 55 | -------------------------------------------------------------------------------- /.swift-version: -------------------------------------------------------------------------------- 1 | 3.0 2 | -------------------------------------------------------------------------------- /KeypathObserver.podspec: -------------------------------------------------------------------------------- 1 | Pod::Spec.new do |s| 2 | 3 | s.name = "KeypathObserver" 4 | s.version = "1.0.0" 5 | s.summary = "Make KVO observing easier." 6 | 7 | s.description = <<-DESC 8 | KVO observing with simple syntax. 9 | DESC 10 | 11 | s.homepage = "https://github.com/nixzhu/KeypathObserver" 12 | 13 | s.license = { :type => "MIT", :file => "LICENSE" } 14 | 15 | s.authors = { "nixzhu" => "zhuhongxu@gmail.com" } 16 | s.social_media_url = "https://twitter.com/nixzhu" 17 | 18 | s.ios.deployment_target = "8.0" 19 | s.osx.deployment_target = "10.10" 20 | s.tvos.deployment_target = "9.0" 21 | s.watchos.deployment_target = "2.0" 22 | 23 | s.source = { :git => "https://github.com/nixzhu/KeypathObserver.git", :tag => s.version } 24 | s.source_files = ["Sources/*.swift", "KeypathObserver/KeypathObserver.h"] 25 | s.public_header_files = ["KeypathObserver/KeypathObserver.h"] 26 | 27 | s.requires_arc = true 28 | 29 | end 30 | -------------------------------------------------------------------------------- /KeypathObserver.xcodeproj/project.pbxproj: -------------------------------------------------------------------------------- 1 | // !$*UTF8*$! 2 | { 3 | archiveVersion = 1; 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All rights reserved. 7 | // 8 | 9 | #import 10 | 11 | //! Project version number for KeypathObserver. 12 | FOUNDATION_EXPORT double KeypathObserverVersionNumber; 13 | 14 | //! Project version string for KeypathObserver. 15 | FOUNDATION_EXPORT const unsigned char KeypathObserverVersionString[]; 16 | 17 | // In this header, you should import all the public headers of your framework using statements like #import 18 | 19 | 20 | -------------------------------------------------------------------------------- /KeypathObserverTests/Info.plist: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | CFBundleDevelopmentRegion 6 | en 7 | CFBundleExecutable 8 | $(EXECUTABLE_NAME) 9 | CFBundleIdentifier 10 | $(PRODUCT_BUNDLE_IDENTIFIER) 11 | CFBundleInfoDictionaryVersion 12 | 6.0 13 | CFBundleName 14 | $(PRODUCT_NAME) 15 | CFBundlePackageType 16 | BNDL 17 | CFBundleShortVersionString 18 | 1.0 19 | CFBundleSignature 20 | ???? 21 | CFBundleVersion 22 | 1 23 | 24 | 25 | -------------------------------------------------------------------------------- /KeypathObserverTests/KeypathObserverTests.swift: -------------------------------------------------------------------------------- 1 | // 2 | // KeypathObserverTests.swift 3 | // KeypathObserverTests 4 | // 5 | // Created by NIX on 16/7/2. 6 | // Copyright © 2016年 nixWork. All rights reserved. 7 | // 8 | 9 | import XCTest 10 | import UIKit 11 | @testable import KeypathObserver 12 | 13 | class KeypathObserverTests: XCTestCase { 14 | 15 | var view: UIView? 16 | var centerObserver: KeypathObserver? 17 | var colorObserver: KeypathObserver? 18 | 19 | func testKeypathObserver() { 20 | 21 | let view = UIView() 22 | 23 | self.centerObserver = KeypathObserver( 24 | object: view, 25 | keypath: #keyPath(UIView.center), 26 | valueTransformer: { ($0 as? NSValue)?.cgPointValue }, 27 | valueChanged: { oldCenter, newCenter in 28 | print("oldCenter: \(String(describing: oldCenter))") 29 | print("newCenter: \(String(describing: newCenter))") 30 | } 31 | ) 32 | 33 | view.center = CGPoint(x: 100, y: 100) 34 | view.center = CGPoint(x: 200, y: 50) 35 | 36 | self.colorObserver = KeypathObserver( 37 | object: view, 38 | keypath: #keyPath(UIView.backgroundColor), 39 | valueTransformer: { $0 as? UIColor }, 40 | valueUpdated: { newColor in 41 | print("newColor: \(String(describing: newColor))") 42 | } 43 | ) 44 | 45 | view.backgroundColor = UIColor.red 46 | view.backgroundColor = nil 47 | 48 | self.view = view 49 | } 50 | } 51 | 52 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | The MIT License (MIT) 2 | 3 | Copyright (c) 2016 nixzhu 4 | 5 | Permission is hereby granted, free of charge, to any person obtaining a copy 6 | of this software and associated documentation files (the "Software"), to deal 7 | in the Software without restriction, including without limitation the rights 8 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 9 | copies of the Software, and to permit persons to whom the Software is 10 | furnished to do so, subject to the following conditions: 11 | 12 | The above copyright notice and this permission notice shall be included in all 13 | copies or substantial portions of the Software. 14 | 15 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 18 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 19 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 20 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 21 | SOFTWARE. 22 | -------------------------------------------------------------------------------- /Package.swift: -------------------------------------------------------------------------------- 1 | // 2 | // Package.swift 3 | // KeypathObserver 4 | // 5 | // Created by NIX on 16/7/2. 6 | // Copyright © 2016年 nixWork. All rights reserved. 7 | // 8 | 9 | import PackageDescription 10 | 11 | let package = Package( 12 | name: "KeypathObserver" 13 | ) 14 | 15 | 16 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 |

2 | 3 | 4 |

5 | 6 | # KeypathObserver 7 | 8 | KVO observing with simple syntax. 9 | 10 | ## Requirements 11 | 12 | Swift 3.0, iOS 8.0 13 | 14 | (Swift 2.3, use version 0.6.0) 15 | 16 | ## Example 17 | 18 | ``` swift 19 | class ViewController: UIViewController { 20 | 21 | var view: UIView? 22 | var centerObserver: KeypathObserver? 23 | var colorObserver: KeypathObserver? 24 | 25 | deinit { 26 | centerObserver = nil 27 | colorObserver = nil 28 | } 29 | 30 | override func viewDidLoad() { 31 | super.viewDidLoad() 32 | 33 | let view = UIView() 34 | 35 | self.centerObserver = KeypathObserver( 36 | object: view, 37 | keypath: #keyPath(UIView.center), 38 | valueTransformer: { ($0 as? NSValue)?.cgPointValue }, 39 | valueChanged: { oldCenter, newCenter in 40 | print("oldCenter: \(oldCenter)") 41 | print("newCenter: \(newCenter)") 42 | } 43 | ) 44 | 45 | view.center = CGPoint(x: 100, y: 100) 46 | view.center = CGPoint(x: 200, y: 50) 47 | 48 | self.colorObserver = KeypathObserver( 49 | object: view, 50 | keypath: #keyPath(UIView.backgroundColor), 51 | valueTransformer: { $0 as? UIColor }, 52 | valueUpdated: { newColor in 53 | print("newColor: \(newColor)") 54 | } 55 | ) 56 | 57 | view.backgroundColor = UIColor.redColor() 58 | view.backgroundColor = nil 59 | 60 | self.view = view 61 | } 62 | } 63 | ``` 64 | 65 | ## Installation 66 | 67 | ### Carthage 68 | 69 | ```ogdl 70 | github "nixzhu/KeypathObserver" >= 1.0.0 71 | ``` 72 | 73 | #### CocoaPods 74 | 75 | ``` ogdl 76 | pod 'KeypathObserver', '~> 1.0.0' 77 | ``` 78 | 79 | # Contact 80 | 81 | NIX [@nixzhu](https://twitter.com/nixzhu) 82 | 83 | ## License 84 | 85 | KeypathObserver is available under the [MIT License][mitLink]. See the LICENSE file for more info. 86 | 87 | [mitLink]:http://opensource.org/licenses/MIT 88 | -------------------------------------------------------------------------------- /Sources/KeypathObserver.swift: -------------------------------------------------------------------------------- 1 | // 2 | // KeypathObserver.swift 3 | // KeypathObserver 4 | // 5 | // Created by NIX on 16/7/2. 6 | // Copyright © 2016年 nixWork. All rights reserved. 7 | // 8 | 9 | import Foundation 10 | 11 | final public class KeypathObserver: NSObject { 12 | 13 | private weak var object: Object? 14 | private var keypath: String 15 | 16 | public typealias ValueTransformer = (_ originalValue: AnyObject) -> Value? 17 | private var valueTransformer: ValueTransformer 18 | 19 | public typealias ValueChanged = (_ oldValue: Value?, _ newValue: Value?) -> Void 20 | private var valueChanged: ValueChanged? 21 | 22 | public typealias ValueUpdated = (_ newValue: Value?) -> Void 23 | private var valueUpdated: ValueUpdated? 24 | 25 | private var kvoContext: Int = 1 26 | 27 | deinit { 28 | object?.removeObserver(self, forKeyPath: keypath) 29 | } 30 | 31 | public init(object: Object, keypath: String, options: NSKeyValueObservingOptions? = nil, valueTransformer: @escaping ValueTransformer, valueChanged: @escaping ValueChanged) { 32 | 33 | self.object = object 34 | self.keypath = keypath 35 | self.valueTransformer = valueTransformer 36 | self.valueChanged = valueChanged 37 | 38 | super.init() 39 | 40 | object.addObserver(self, forKeyPath: keypath, options: options ?? [.initial, .old, .new], context: &kvoContext) 41 | } 42 | 43 | public init(object: Object, keypath: String, options: NSKeyValueObservingOptions? = nil, valueTransformer: @escaping ValueTransformer, valueUpdated: @escaping ValueUpdated) { 44 | 45 | self.object = object 46 | self.keypath = keypath 47 | self.valueTransformer = valueTransformer 48 | self.valueUpdated = valueUpdated 49 | 50 | super.init() 51 | 52 | object.addObserver(self, forKeyPath: keypath, options: options ?? [.new], context: &kvoContext) 53 | } 54 | 55 | public override func observeValue(forKeyPath keyPath: String?, of object: Any?, change: [NSKeyValueChangeKey : Any]?, context: UnsafeMutableRawPointer?) { 56 | 57 | guard context == &kvoContext else { 58 | return 59 | } 60 | 61 | guard let object = object as? Object else { 62 | return 63 | } 64 | 65 | guard object == self.object && keypath == self.keypath, let change = change else { 66 | return 67 | } 68 | 69 | let newValue: Value? 70 | if let originalNewValue = change[NSKeyValueChangeKey.newKey] { 71 | newValue = valueTransformer(originalNewValue as AnyObject) 72 | } else { 73 | newValue = nil 74 | } 75 | 76 | if let valueChanged = self.valueChanged { 77 | 78 | let oldValue: Value? 79 | if let originalOldValue = change[NSKeyValueChangeKey.oldKey] { 80 | oldValue = valueTransformer(originalOldValue as AnyObject) 81 | } else { 82 | oldValue = nil 83 | } 84 | 85 | valueChanged(oldValue, newValue) 86 | 87 | } else { 88 | self.valueUpdated?(newValue) 89 | } 90 | } 91 | } 92 | 93 | --------------------------------------------------------------------------------