unknown-undefined

// do common initilizer
class BaseNavigationController: UINavigationController {
    override func viewDidLayoutSubviews() {
        super.viewDidLayoutSubviews()
        fixNavigationItemsMargin()
    }
    
    override func viewDidAppear(_ animated: Bool) {
        super.viewDidAppear(animated)
        fixNavigationItemsMargin()

unknown-undefined

Configure Git to use a proxy

##In Brief

You may need to configure a proxy server if you're having trouble cloning or fetching from a remote repository or getting an error like unable to access '...' Couldn't resolve host '...'.

Consider something like:

unknown-undefined

Core Data

• -com.apple.CoreData.SQLDebug 1-3 - print all SQL queries called by Core Data
  • -com.apple.CoreData.Logging.stderr 1-3 - needed alongside with the SQLDebug from iOS 10+ because of new logging system, more on that in changelog
• -com.apple.CoreData.SyntaxtColoredLogging YES - probably syntax colored logging (not tried)
• -com.apple.CoreData.SQLiteDebugSynchronous 1 - preference controls some aspects of the SQLite store. See the "Configuring a SQLite Store's Save Behavior" section of the Core Data Programming Guide for details
• -com.apple.CoreData.SQLiteIntegrityCheck 1 - the SQLite store does extra integrity checking
• -com.apple.CoreData.MigrationDebug 1 - Core Data will log information about exceptional cases as it migrates data
• -com.apple.CoreData.ThreadingDebug - preference enables assertions to enforce Core Data's multi-threading policy. It is a number, where incre

unknown-undefined

//
//  SectionBackgroundFlowLayout.swift
//
//  Created by Samuel's on 2020/7/29.

import UIKit

@objc protocol SectionBackgroundFlowLayoutDelegate: NSObjectProtocol {
    func sectionsNeedBackgroundColor(in collectionView: UICollectionView, layout: UICollectionViewFlowLayout) -> [Int]
    func classForBackgroundViewAttributes() -> UICollectionViewLayoutAttributes.Type

unknown-undefined

import UIKit

extension UIControl {
    /// add handler for specific `UIControl.Event`
    func addEvent(_ event: UIControl.Event, handler: @escaping (UIControl) -> Void) {
        let holder = EventHandlerHolder(action: handler)
        retainHolder(holder, for: event)
        addTarget(holder, action: #selector(holder.invokeHandler), for: event)
    }