yaakovgamliel

// in a UITableViewController (or any other view controller with a UITableView)

- (void)viewWillTransitionToSize:(CGSize)size withTransitionCoordinator:(id<UIViewControllerTransitionCoordinator>)coordinator
{
    UIView *header = [[UIView alloc] initWithFrame:CGRectMake(0, 0, size.width, 0)];
    header.translatesAutoresizingMaskIntoConstraints = NO;
    
    // [add subviews and their constraints to header]

    NSLayoutConstraint *headerWidthConstraint = [NSLayoutConstraint 

yaakovgamliel

/// Observes a run loop to detect any stalling or blocking that occurs.
///
/// This class is thread-safe.
@interface GHRunLoopWatchdog : NSObject

/// Initializes the receiver to watch the specified run loop, using a default
/// stalling threshold.
- (id)initWithRunLoop:(CFRunLoopRef)runLoop;

/// Initializes the receiver to detect when the specified run loop blocks for

yaakovgamliel

msf > irb
[*] Starting IRB shell...

>> require 'method_source'
=> true
>> framework.db.method(:import_ip_list_file).source_location
=> ["/Users/sinn3r/rapid7/msf/lib/msf/core/db_manager/import/ip_list.rb", 18]
>> framework.db.method(:import_ip_list_file).parameters
=> [[:opt, :args]]
>> puts framework.db.method(:import_ip_list_file).source

yaakovgamliel

#include <unistd.h>
#include <mach/mach.h>
#include <mach/mach_vm.h>
#include <mach-o/dyld.h>

int
main (int argc, char * argv[])
{
  volatile char * library;
  const mach_vm_size_t page_size = getpagesize ();

yaakovgamliel

#define SWIZZLE_ADD_ANIMATION 0

#if DEBUG && SWIZZLE_ADD_ANIMATION

+ (void)load {
  safe_swap_implementation(self, @selector(addAnimation:forKey:), @selector(bb_addAnimation:forKey:));
}

- (void)bb_addAnimation:(CAAnimation *)animation forKey:(NSString *)key {
  // Ignore the stupid phantom text field's cursor animation

yaakovgamliel

/// Performs `block` immediately and ignores subsequent calls during the same runloop.
#define pspdf_ensureCalledOnlyOncePerRunloop(block) do { \
static const char __onceKey; _pspdf_ensureCalledOnlyOncePerRunloop(self, &__onceKey, block); } while(0)
extern void _pspdf_ensureCalledOnlyOncePerRunloop(id self, const void *key, dispatch_block_t block);

void _pspdf_ensureCalledOnlyOncePerRunloop(id self, const void *key, dispatch_block_t block) {
    NSCParameterAssert(block);
    NSCParameterAssert(self);
    PSPDFAssertOnMainThread(); // run loop needs the main thread.

yaakovgamliel

//
//  Nexmo.m
//
//  Created by Tewodros Wondimu on 3/7/15.
//  Contact: tewodroswondimu@gmail.com
//  Copyright (c) 2015 Tewodros Wondimu. All rights reserved.
//

#import "Nexmo.h"

yaakovgamliel

* {
    font-size: 12pt;
    font-family: monospace;
    font-weight: normal;
    font-style: normal;
    text-decoration: none;
    color: black;
    cursor: default;
}

yaakovgamliel

Thoughts on Swift 2 Errors

When Swift was first announced, I was gratified to see that one of the (few) philosophies that it shared with Objective-C was that exceptions should not be used for control flow, only for highlighting fatal programming errors at development time.

So it came as a surprise to me when Swift 2 brought (What appeared to be) traditional exception handling to the language.

Similarly surprised were the functional Swift programmers, who had put their faith in the Haskell-style approach to error handling, where every function returns an enum (or monad, if you like) containing either a valid result or an error. This seemed like a natural fit for Swift, so why did Apple instead opt for a solution originally designed for clumsy imperative languages?

I'm going to cover three things in this post:

yaakovgamliel

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.