wh1pch81n’s gists

wh1pch81n / concatenating_errors.swift

Last active January 7, 2017 17:28

What is one trick you can do to avoid the do-catch pyramid of doom? you can return "try method()"

	enum ErrorEnum: Error {
	case FooError
	case BarError
	}

	func bar(success: Bool) throws -> String {
	if success {
	return "bar success"
	}
	throw ErrorEnum.BarError

wh1pch81n / enumstring_as_class.swift

Created January 7, 2017 19:33

NS_ENUM_STRING ports a struct with static strings. This means between objc and swift you have to learn how to read both versions of it which can be confusing. It is much better to have a more consistent api between both. Therefore you can use a class.

	func ==(lhs: EnumString, rhs: String) -> Bool {
	return lhs.isEqual(rhs)
	}

	func ==(lhs: String, rhs: EnumString) -> Bool {
	return rhs.isEqual(lhs)
	}

	class EnumString: NSObject {
	let rawValue: String

wh1pch81n / programmaticallyTap.swift

Created February 9, 2017 02:22

A little extension that lets you "tap" a UIBarButtonItem programmatically

	extension UIBarButtonItem {
	public func programmaticallyTap() {
	if let target = target
	, let action = action
	{
	target.value(forKey: NSStringFromSelector(action))
	}
	}
	}

wh1pch81n / gist:f69238308366d42b8113bb5c72f5f499

Last active February 12, 2017 15:31

	class ViewController: UIViewController {
	override func viewDidLoad() {
	super.viewDidLoad()

	specialMethod()

	}

	func specialMethod() {
	// overridable method

wh1pch81n / gist:0308d740af16ae0e73e5716778fb0771

Last active February 12, 2017 15:42

	class ViewController: UIViewController {

	var customizerObject: SpecialProtocol?

	override func viewDidLoad() {
	super.viewDidLoad()

	specialMethod()

	}

wh1pch81n / gist:daf833074b0fe642f93b5062cd62f72b

Created February 12, 2017 16:00

	protocol SpecialProtocol: class {
	func specialMethod(_ vc: ViewController)
	}

	class VCCustomizer: NSObject, SpecialProtocol {
	func specialMethod(_ vc: ViewController) {
	// Special implementation
	}
	}

wh1pch81n / gist:3f827c69a6301171610071e2ff74aa33

Created February 12, 2017 16:12

	@interface SpecialProtocol <
	__covariant VIEW_CONTROLLER: UIViewController *
	> : NSObject

	- (void)specialMethod:(VIEW_CONTROLLER _Nonnull)viewController;
	@end

wh1pch81n / gist:8c6fd804deda9b5636879a6ba924a8ba

Created February 12, 2017 16:20

	class ViewController: UIViewController {

	var customizerObject: SpecialProtocol<ViewController>?

	override func viewDidLoad() {
	super.viewDidLoad()

	specialMethod()

	}

wh1pch81n / gist:558037e425046436abeff27566902ca7

Created February 12, 2017 16:28

	// SWIFT
	class SpecialRed: SpecialProtocol<ViewController> {
	override func specialMethod(_ viewController: ViewController) {
	// customization
	}
	}

	// Objective-C
	@interface SpecialBlue: SpecialProtocol<ViewController *>
	@end

wh1pch81n / gist:03370b05a8bf797f57ebe11f1de51f40

Created February 12, 2017 16:31

	my_viewcontroller.customizerObject = SpecialRed()
	my_viewController.customizerObject = SpecialBlue()