ZevEisenberg

The MIT License (MIT)

Copyright (c) 2016 Zev Eisenberg

Permission is hereby granted, free of charge, to any person obtaining a copy of
this software and associated documentation files (the "Software"), to deal in
the Software without restriction, including without limitation the rights to
use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
the Software, and to permit persons to whom the Software is furnished to do so,
subject to the following conditions:

natecook1000

Greetings and salutations, NSHipsters!

As the year winds down, it's a tradition here at NSHipster to ask you, dear readers, to offer up your favorite tricks and tips from the past year as gifts to your fellow hipsters. With iOS 9, El Capitan, brand new watch- and tvOS's, and the open-sourcing of some minor Apple-related tech, there's bound to be lots to share.

Submit your favorite piece of Swift or @objc trivia, helpful hints, unexpected discoveries, useful workarounds, useless fascinations, or anything else you found cool this year. Just comment below!

If you need inspiration, try [the list from last year][2015], or [from the year before][2014], or [from the year before that][2013].

jarsen

import Foundation

//
// MARK: - JSONError Type
//

public enum JSONError: ErrorType, CustomStringConvertible {
    case KeyNotFound(key: JSONKeyType)
    case NullValue(key: JSONKeyType)
    case TypeMismatch(expected: Any, actual: Any)

tfrank64

    func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: NSDictionary?) -> Bool {
        // Override point for customization after application launch.
        self.window = UIWindow(frame: UIScreen.mainScreen().bounds)
        
        var nav1 = UINavigationController()
        var first = FirstViewController(nibName: nil, bundle: nil)
        nav1.viewControllers = [first]
        
        var second = SecondViewController(nibName: nil, bundle: nil)
        var nav2 = UINavigationController()

mmick66

#import "UICollectionViewFlowLayoutCenterItem.h"

@implementation UICollectionViewFlowLayoutCenterItem

- (CGPoint)targetContentOffsetForProposedContentOffset:(CGPoint)proposedContentOffset withScrollingVelocity:(CGPoint)velocity
{
    CGSize collectionViewSize = self.collectionView.bounds.size;
    CGFloat proposedContentOffsetCenterX = proposedContentOffset.x + self.collectionView.bounds.size.width * 0.5f;
    
    CGRect proposedRect = self.collectionView.bounds;