swift

Issue #577 https://stackoverflow.com/questions/59724731/class-avassetdownloadtask-is-implemented-in-both-cfnetwork-and-avfoundation objc[45250]: Class AVAssetDownloadTask is implemented in both /Applications/Xcode.app/Contents/Developer/Platforms/WatchOS.platform/Library/Developer/CoreSimulator/Profiles/Runtimes/watchOS.simruntime/Contents/Resources/RuntimeRoot/System/Library/Frameworks/CFNetwork.framework/CFNetwork (0x4ddd0ec) and /Applications/Xcode.app/Contents/Developer/Platforms/WatchOS.platform/Library/Developer/CoreSimulator/Profiles/Runtimes/watchOS.simruntime/Contents/Resources/RuntimeRoot/System/Library/Frameworks/AVFoundation.framework/AVFoundation (0x16aea494). One of the two will be used. Which one is undefined. objc[45250]: Class AVAssetDownloadURLSession is implemented in both /Applications/Xcode.app/Contents/Developer/Platforms/WatchOS.platform/Library/Developer/CoreSimulator/Profiles/Runtimes/watchOS.simruntime/Contents/Resources/RuntimeRoot/System/Library/Frameworks/CFNetwork.framework/CFNetwork (0x4dddd44) and /Applications/Xcode.app/Contents/Developer/Platforms/WatchOS.platform/Library/Developer/CoreSimulator/Profiles/Runtimes/watchOS.simruntime/Contents/Resources/RuntimeRoot/System/Library/Frameworks/AVFoundation.framework/AVFoundation (0x16aea4bc). One of the two will be used. Which one is undefined. Then URLSession stops working. 2020-01-13 22:50:12.430920+0100 MyAppWatch WatchKit Extension[45250:2099229] Task <3CECDE81-59B9-4EDE-A4ED-1BA173646037>.<1> finished with error [-999] Error Domain=NSURLErrorDomain Code=-999 "cancelled" UserInfo={NSErrorFailingURLKey=https://myapp.com/def.json, NSErrorFailingURLStringKey=https://myapp.com/def.json, NSLocalizedDescription=cancelled} The workaround is to remove Combine based API, and use completion block....

Issue #576 Code See Spek Override testInvocations to specify test methods https://developer.apple.com/documentation/xctest/xctestcase/1496271-testinvocations Returns an array of invocations representing each test method in the test case. Because testInvocations is unavailable in Swift, we need to use ObjC #import "include/SpekHelperTestCase.h" @implementation SpekHelperTestCase - (instancetype)init { self = [super initWithInvocation: nil]; return self; } + (NSArray<NSInvocation *> *)testInvocations { NSArray<NSString *> *selectorStrings = [self spekGenerateTestMethodNames]; NSMutableArray<NSInvocation *> *invocations = [NSMutableArray arrayWithCapacity:selectorStrings....

Issue #575 Create Objc target http://ankit.im/swift/2016/05/21/creating-objc-cpp-packages-with-swift-package-manager/ Check runtime Check for example _runtime(_ObjC) or os(macOS if you plan to use platform specific feature https://github.com/Quick/Quick/blob/master/Package.swift https://github.com/Quick/Quick/pull/687/files For example, in test we use XCTest which is run via Xcode and is a macOS framework, so we need to check for os(macOS) Note that in Objc framework, the header files must be in include folder targets: { var targets: [Target] = [ ....

Issue #574 expr -l Swift -- import UIKit expr -l Swift -- let $collectionView = unsafeBitCast(0x7fddd8180000, to: UICollectionView.self) expr -l Swift -- $collectionView.safeAreaInsets

Issue #569 From documentation https://developer.apple.com/documentation/uikit/uicollectionviewlayout/1617726-initiallayoutattributesforappear This method is called after the prepare(forCollectionViewUpdates:) method and before the finalizeCollectionViewUpdates() method for any decoration views that are about to be inserted. Your implementation should return the layout information that describes the initial position and state of the view. The collection view uses this information as the starting point for any animations. (The end point of the animation is the view’s new location in the collection view....

Issue #568 Code EasyTracker Swizzle viewDidAppear https://github.com/onmyway133/EasyTracker/blob/master/Sources/Trackers.swift import UIKit var mapping: [String: (UIViewController) -> Void] = [:] var hasSwizzled = false public func track<T: UIViewController>(_ type: T.Type, block: @escaping (T) -> Void) { let original = #selector(UIViewController.viewDidAppear(_:)) let swizled = #selector(UIViewController.trackers_viewDidAppear(_:)) if !hasSwizzled { swizzle(kClass: UIViewController.self, originalSelector: original, swizzledSelector: swizled) hasSwizzled = true } mapping[NSStringFromClass(type)] = { controller in if let controller = controller as? T { block(controller) } } } extension UIViewController { func trackers_viewDidAppear(_ animated: Bool) { trackers_viewDidAppear(animated) let string = NSStringFromClass(type(of: self)) mapping[string]?...

Issue #567 Code Upstream Make open Adapter https://github.com/onmyway133/Upstream import UIKit public protocol AdapterDelegate: class { /// Apply model to view func configure(model: Any, view: UIView, indexPath: IndexPath) /// Handle view selection func select(model: Any) /// Size the view func size(model: Any, containerSize: CGSize) -> CGSize } /// Act as DataSource and Delegate for UICollectionView, UITableView open class Adapter: NSObject, UICollectionViewDataSource, UICollectionViewDelegateFlowLayout, UITableViewDataSource, UITableViewDelegate { public var sections: [Section] = [] public weak var collectionView: UICollectionView?...

Issue #566 Code FantasticDisplay Create a container that has blur effect public class HUDContainer: UIVisualEffectView, AnimationAware { private let innerContentView: UIView & AnimationAware public let label = UILabel() public var text: String? { didSet { label.text = text label.sizeToFit() label.isHidden = text == nil } } public init(contentView: UIView & AnimationAware) { self.innerContentView = contentView super.init(effect: UIBlurEffect(style: .light)) self.contentView.addSubview(innerContentView) self.contentView.addSubview(label) innerContentView.pinEdgesToSuperview() configure() } public required init?(coder aDecoder: NSCoder) { fatalError() } public func configure() { layer....

Issue #565 Serious Security: The decade-ending Y2K bug that wasnt Challenges of DateFormatters

Issue #564 Code https://github.com/JohnSundell/publish Example https://github.com/pumaswift/pumaswift.github.io Steps Step 1: Create executable swift package init --type executable Step 2: Edit package // swift-tools-version:5.1 // The swift-tools-version declares the minimum version of Swift required to build this package. import PackageDescription let package = Package( name: "PumaSwiftWeb", dependencies: [ .package(url: "https://github.com/johnsundell/publish.git", from: "0.1.0") ], targets: [ .target( name: "PumaSwiftWeb", dependencies: [ "Publish" ] ) ] ) Step 3: Double click Package.swift, Xcode opens that in a generated project Step 4: Declare website....

Issue #562 Run Timer in command line application Timer.scheduledTimer(withTimeInterval: seconds, repeats: false, block: { _ in completion(.success(())) }) RunLoop.current.run() Read more https://www.hackingwithswift.com/articles/117/the-ultimate-guide-to-timer https://learnappmaking.com/timer-swift-how-to/

Issue #560 Create a bot https://slack.com/intl/en-no/help/articles/115005265703-create-a-bot-for-your-workspace https://api.slack.com/bot-users#setup-events-api https://api.slack.com/bot-users#installing-bot Post message After adding bot to workspace, we’ll get OAuth Access Token and Bot User OAuth Access Token. Use Bot User OAuth Access Token to test drive bot message sending https://api.slack.com/methods/chat.postMessage/test The request url is like https://slack.com/api/chat.postMessage?token=xoxb-7212342835698-890815481123-abcdGgDEFfm2joQs1Vj5mABC&channel=random&text=hello&pretty=1 Code from Puma import Foundation public class Slack { public var name: String = "Send message to Slack" public var isEnabled = true private var message: Message?...

Issue #559 public class GetDestinations { public init() {} public func getAvailable(workflow: Workflow) throws -> [Destination] { let processHandler = DefaultProcessHandler(filter: { $0.starts(with: "name=") }) let string = try CommandLine().runBash( workflow: workflow, program: "xcrun simctl", arguments: [ "list", "devices", "-j" ], processHandler: processHandler ) guard let data = string.data(using: .utf8) else { throw PumaError.invalid } let response: Response = try JSONDecoder().decode(Response.self, from: data) let devicesWithOS: [DeviceWithOS] = response.devices.flatMap({ key, value in return value....

Issue #558 public class GetDestinations { public init() {} public func getAvailable(workflow: Workflow) throws -> [Destination] { let processHandler = DefaultProcessHandler(filter: { $0.starts(with: "name=") }) let string = try CommandLine().runBash( workflow: workflow, program: "xcrun instruments", arguments: [ "-s", "devices" ], processHandler: processHandler ) // Ex: iPad Air (11.0.1) [7A5EAD29-D870-49FB-9A9B-C81079620AC9] (Simulator) let destinations: [Destination] = try string .split(separator: "\n") .map({ String($0) }) .filter({ try $0.hasPattern(pattern: #"\[.+\]"#) }) .compactMap({ (line) -> Destination? in parse(line) }) return destinations } func parse(_ line: String) -> Destination?...

Issue #556 Instead of learning XMLParser, we can make a lightweight version import Foundation public protocol XmlItem { func toLines() -> [String] } public struct XmlString: XmlItem { public let key: String public let value: String public init(key: String, value: String) { self.key = key self.value = value } public func toLines() -> [String] { return [ "<key>\(key)</key>", "<string>\(value)</string>" ] as [String] } } public struct XmlBool: XmlItem { public let key: String public let value: Bool public init(key: String, value: Bool) { self....

Issue #554 A class must inherit from NSObject, and we have 3 ways to trigger property change Use setValue(value: AnyObject?, forKey key: String) from NSKeyValueCoding class MyObjectToObserve: NSObject { var myDate = NSDate() func updateDate() { setValue(NSDate(), forKey: "myDate") } } Use willChangeValueForKey and didChangeValueForKey from NSKeyValueObserving class MyObjectToObserve: NSObject { var myDate = NSDate() func updateDate() { willChangeValueForKey("myDate") myDate = NSDate() didChangeValueForKey("myDate") } } Use dynamic. See Swift Type Compatibility...

Issue #553 Read Swift asserts - the missing manual debug release release function -Onone -O -Ounchecked assert() YES NO NO assertionFailure() YES NO NO** precondition() YES YES NO preconditionFailure() YES YES YES** fatalError()* YES YES YES And from Interesting discussions on Swift Evolution – assert: checking your own code for internal errors – precondition: for checking that your clients have given you valid arguments. Read more https://stackoverflow....

Issue #551 Find matches import Foundation public extension String { func matches(pattern: String) throws -> [String] { let regex = try NSRegularExpression(pattern: pattern) let results = regex.matches(in: self, options: [], range: NSRange(self.startIndex..., in: self)) return results.compactMap({ result in if let range = Range(result.range, in: self) { return String(self[range]) } else { return nil } }) } func hasPattern(pattern: String) throws -> Bool { return try !matches(pattern: pattern).isEmpty } } func testRegex() throws { let string = "iPad Air (11....

Issue #549 Use Semaphore public class Sequence: Task { public func run(workflow: Workflow, completion: @escaping TaskCompletion) { let semaphore = DispatchSemaphore(value: 0) runFirst(tasks: tasks, workflow: workflow, completion: { result in completion(result) semaphore.signal() }) semaphore.wait() } } public class Concurrent: Task { public func run(workflow: Workflow, completion: @escaping (Result<(), Error>) -> Void) { var runTaskCount = 0 let taskCount = tasks.count let semaphore = DispatchSemaphore(value: 0) tasks.forEach { task in task.run(workflow: workflow, completion: { _ in self....

Issue #547 func sync<T>(_ work: (@escaping ([T]) -> Void) -> Void) -> [T] { let semaphore = DispatchSemaphore(value: 1) var results = [T]() work { values in results = values semaphore.signal() } return results } sync({ completion in service.load(completion) })