alanzeino

LLDB Debugging Cheat Sheet

Commands

LLDB Commands

LLDB comes with a great set of commands for powerful debugging.

help

Your starting point for anything. Type help to get a list of all commands, plus any user installed ones. Type 'help for more information on a command. Type help to get help for a specific option in a command too.

jacks205

func timeAgoSinceDate(date:NSDate, numericDates:Bool) -> String {
    let calendar = NSCalendar.currentCalendar()
    let now = NSDate()
    let earliest = now.earlierDate(date)
    let latest = (earliest == now) ? date : now
    let components:NSDateComponents = calendar.components([NSCalendarUnit.Minute , NSCalendarUnit.Hour , NSCalendarUnit.Day , NSCalendarUnit.WeekOfYear , NSCalendarUnit.Month , NSCalendarUnit.Year , NSCalendarUnit.Second], fromDate: earliest, toDate: latest, options: NSCalendarOptions())
    
    if (components.year >= 2) {
        return "\(components.year) years ago"
    } else if (components.year >= 1){

vlondon

func convertImageToGrayScale(image: UIImage) -> UIImage {
    // Create image rectangle with current image width/height
    let imageRect: CGRect = CGRectMake(0, 0, image.size.width, image.size.height)
    
    // Grayscale color space
    let colorSpace: CGColorSpaceRef = CGColorSpaceCreateDeviceGray()
    
    // Create bitmap content with current image size and grayscale colorspace
    let bitmapInfo = CGBitmapInfo(CGImageAlphaInfo.None.rawValue)
    var context = CGBitmapContextCreate(nil, UInt(image.size.width), UInt(image.size.height), 8, 0, colorSpace, bitmapInfo)

chriseidhof

\lstdefinelanguage{swift}
{
  morekeywords={
    func,if,then,else,for,in,while,do,switch,case,default,where,break,continue,fallthrough,return,
    typealias,struct,class,enum,protocol,var,func,let,get,set,willSet,didSet,inout,init,deinit,extension,
    subscript,prefix,operator,infix,postfix,precedence,associativity,left,right,none,convenience,dynamic,
    final,lazy,mutating,nonmutating,optional,override,required,static,unowned,safe,weak,internal,
    private,public,is,as,self,unsafe,dynamicType,true,false,nil,Type,Protocol,
  },
  morecomment=[l]{//}, % l is for line comment

yannickl

import Foundation
import UIKit

extension UIColor {
    convenience init(hexString:String) {
        let hexString:NSString = hexString.stringByTrimmingCharactersInSet(NSCharacterSet.whitespaceAndNewlineCharacterSet())
        let scanner            = NSScanner(string: hexString)
        
        if (hexString.hasPrefix("#")) {
            scanner.scanLocation = 1

calebd

import Foundation

/// An abstract class that makes building simple asynchronous operations easy.
/// Subclasses must implement `execute()` to perform any work and call
/// `finish()` when they are done. All `NSOperation` work will be handled
/// automatically.
open class AsynchronousOperation: Operation {

    // MARK: - Properties

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;