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romaonthego / kill.rb
Created Dec 9, 2015 — forked from timonus/kill.rb
Deletes all yer iOS simulators
View kill.rb
#!/usr/bin/env ruby
device_types_output = `xcrun simctl list devicetypes`
device_types = device_types_output.scan /(.*) \((.*)\)/
runtimes_output = `xcrun simctl list runtimes`
runtimes = runtimes_output.scan /(.*) \(.*\) \(([^)]+)\)$/
devices_output = `xcrun simctl list devices`
devices = devices_output.scan /\s\s\s\s(.*) \(([^)]+)\) (.*)/
View MusicPlayer.m
MPMusicPlayerController *controller = [MPMusicPlayerController iPodMusicPlayer];
MPMediaPropertyPredicate *artistPredicate = [MPMediaPropertyPredicate predicateWithValue:@"The Killers"
MPMediaQuery *query = [[MPMediaQuery alloc] initWithFilterPredicates:[NSSet setWithArray:@[artistPredicate]]];
for (MPMediaItem *song in query.items) {
NSString *songTitle = [song valueForProperty: MPMediaItemPropertyTitle];
View Hacking UIView Animation

Hacking UIView animation blocks for fun and profit

In this article, I'm going to explore a way that we can create views that implement custom Core Animation property animations in a natural way.

As we know, layers in iOS come in two flavours: Backing layers and hosted layers. The only difference between them is that the view acts as the layer delegate for its backing layer, but not for any hosted sublayers.

In order to implement the UIView transactional animation blocks, UIView disables all animations by default and then re-enables them individually as required. It does this using the actionForLayer:forKey: method.

Somewhat strangely, UIView doesn't enable animations for every property that CALayer does by default. A notable example is the layer.contents property, which is animatable by default for a hosted layer, but cannot be animated using a UIView animation block.

View Closure.swift
self.errorView = {
let view = UIView()
view.backgroundColor = UIColor.redColor()
self.errorLabel = {
let label = UILabel()
label.textAlignment = .Center
label.backgroundColor = UIColor.clearColor()
return label
View error.swift
// Playground - noun: a place where people can play
import Foundation
enum Result<ValueType, ErrorType> : LogicValue {
case Value(ValueType)
case Error(ErrorType)
var successful : Bool {
get {
View AccountStore.swift
class AccountStore {
// Doesn't work yet
class var sharedStore = ACAccountStore()
// This works although I'm unsure of the optional
class func sharedStore() -> ACAccountStore {
var store: ACAccountStore? = nil
var token: dispatch_once_t = 0
dispatch_once(&token, {



To create a method to persist and re-instantiate Mantle MTLModel objects to NSUbiquitousKeyValueStore (iCloud key-value store).


NSUbiquitousKeyValueStore can only store values of class NSNumber, NSString, NSDate, NSData, NSArray, and NSDictionary ("plist types"). The MTLNSUbiquitousKeyValueStore category on MTLModel has been designed to create an NSDictionary representation of a model object in a deeply recursive way, making it suitable for storage in an NSUbiquitousKeyValueStore.

View gist:6942007
typedef enum _UIBackgroundStyle {
} UIBackgroundStyle;
@interface UIApplication (UIBackgroundStyle)
romaonthego / htmltest.m
Created Sep 23, 2013
UITextView with HTML text (iOS 7)
View htmltest.m
- (void)viewDidLoad
[super viewDidLoad];
UITextView *textView = [[UITextView alloc] init];
textView.translatesAutoresizingMaskIntoConstraints = NO;
[self.view addSubview:textView];
[self.view addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"V:|-[textView]-|" options:0 metrics:nil views:NSDictionaryOfVariableBindings(textView)]];
[self.view addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"H:|-[textView]-|" options:0 metrics:nil views:NSDictionaryOfVariableBindings(textView)]];
NSString *htmlString = @"<h1>Header</h1><h2>Subheader</h2><p>Some <em>text</em></p><img src='' width=70 height=100 />";
romaonthego / NSDateFormatter cheat sheet
Last active Sep 8, 2021
Date Formats for NSDateFormatter
View NSDateFormatter cheat sheet
a: AM/PM
A: 0~86399999 (Millisecond of Day)
c/cc: 1~7 (Day of Week)
ccc: Sun/Mon/Tue/Wed/Thu/Fri/Sat
cccc: Sunday/Monday/Tuesday/Wednesday/Thursday/Friday/Saturday
d: 1~31 (0 padded Day of Month)
D: 1~366 (0 padded Day of Year)