Josh Avant joshavant

Translucent Bar Bliss: Scroll View Insetting w/ Nav + Tab Bars, in an IB Workflow

This document describes how to configure your scroll views in IB, so that their insets are configured to accomodate coverage by UINavigationBar and UITabBar.

A common reason for wanting this is to allow these views to configured as 'translucent', while scroll view content scrolls beneath them.

This guide is broken up into two types of view configurations...

Configuration 1: A top-level scroll view, which fills UIViewController's view
Configuration 2: A top-level scroll view, which does not fill UIViewController's view

The recommended way to keep a long-term reference to a particular record is to store the first and last name, or a hash of the first and last name, in addition to the identifier. When you look up a record by ID, compare the record’s name to your stored name. If they don’t match, use the stored name to find the record, and store the new ID for the record.

-from Address Book Programming Guide for iOS, Using Record Identifiers, 2nd paragraph

##XXAppDelegate.m, XXSomeView.m, some other object, etc##

...
[[XXSomeSingletonController sharedInstance] doThatThing];
...

##XXSomeSingletonControllerObserver.h##

@protocol XXSomeSingletonControllerObserver

###Current members of the House of Representatives who voted: NO - PATRIOT Act
NO - 2005 Reauthorization of PATRIOT Act
NO - 2006 Reauthorization of PATRIOT Act
NO - 2011 Reauthorization of PATRIOT Act
YES - Amash Amendment

Rep. Michael Capuano [D-MA7]
Rep. Elijah Cummings [D-MD7]
Rep. Danny Davis [D-IL7]

	// Broken on 9.2, Worked on 9.1
	let keysToFetch = [CNContactGivenNameKey, CNContactFamilyNameKey, CNContactPhoneNumbersKey, CNContactEmailAddressesKey]

	// Works on 9.2 + 9.1
	let keysToFetch = [CNContactPhoneNumbersKey, CNContactEmailAddressesKey, CNContactFormatter.descriptorForRequiredKeysForStyle(.FullName)]

	import Foundation

	protocol Pageable {
	typealias PagedContentType

	var pageLimit: Int { get set }
	var pageOffset: Int { get set }

	func getPage(limit limit: Int, offset: Int, completion: (result: [PagedContentType]?, error: NSError?) -> Void)
	mutating func nextPage(completion: (result: [PagedContentType]?, error: NSError?) -> Void)

	import UIKit

	protocol NibLoadable {
	func setupFromXib()
	}

	// This extension loads a .xib file with the same filename as the class name
	// i.e. `class FoobarHeaderView` -> loads FoobarHeaderView.xib
	extension NibLoadable where Self: UIView {
	func setupFromXib() {

	func alertControllerToSelectContactMethod() -> UIAlertController {
	let controller = UIAlertController(title: "How do you want to contact \(firstName.value)?", message: "", preferredStyle: .ActionSheet)

	let methodsAndHandlers = contactMethodsAndHandlers()

	if (methodsAndHandlers.count == 0) {
	let action = UIAlertAction(title: NSLocalizedString("No Contact Info Found", comment: ""), style: .Default, handler: nil)
	action.enabled = false

	controller.addAction(action)

	static void *kFOOClassKVOContext = &kFOOClassKVOContext;

	@implementation FOOClass

	- (void)addKVOObservers
	{
	[self.property addObserver:self forKeyPath:@"someKeyPath" options:0 context:kFOOClassKVOContext];
	}

	- (void)removeKVOObservers

	#import "Foo.h"

	static dispatch_once_t FooSharedDispatchOnceToken;
	static Foo *FooSharedInstance;

	+ (void)prepareService
	{
	[self fetchSharedServiceAndInitialize:YES];
	}