chrismiles

let colorSpace = CGColorSpaceCreateDeviceRGB()
let componentCount : UInt = 4

let components : [CGFloat] = [
      0,   0,   0,   0,
    1.0, 1.0, 1.0, 1.0,
    1.0, 1.0, 1.0, 1.0,
      0,   0,   0,   0
]

nicklockwood

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.

mattt

@import MobileCoreServices;

static CFStringRef UTTypeForImageData(NSData *data) {
    const unsigned char * bytes = [data bytes];

    if (data.length >= 8) {
        if (bytes[0] == 0x89 && bytes[1] == 0x50 && bytes[2] == 0x4E && bytes[3] == 0x47 && bytes[4] == 0x0D && bytes[5] == 0x0A && bytes[6] == 0x1A && bytes[7] == 0x0A) {
            return kUTTypePNG;
        }
    }

raven

<?xml version="1.0" encoding="UTF-8"?>
<Bucket
   type = "2"
   version = "2.0">
   <Breakpoints>
      <BreakpointProxy
         BreakpointExtensionID = "Xcode.Breakpoint.SymbolicBreakpoint">
         <BreakpointContent
            shouldBeEnabled = "Yes"
            ignoreCount = "0"

chrismiles

""" File: reveal.py

Add to ~/.lldbinit:
    command script import ~/.lldb-scripts/reveal.py

Q: Want to automatically load the Reveal lib on launch while debugging from Xcode?
A: In Xcode:
    Add a Symbolic Breakpoint
    Symbol: "UIApplicationMain"
    Action: Debugger Command with value "reveal"

matthewhudson

<!-- Disable auto-linking of phone numbers. -->
<meta name="format-detection" content="telephone=no">

<!-- Enables the web application runs in full-screen mode. -->
<meta name="apple-mobile-web-app-capable" content="yes">

<!-- Sets the style of the status bar for a web application. -->
<meta name="apple-mobile-web-app-status-bar-style" content="black">

<!-- Sets the initial scale and turns off user scaling. -->

chrismiles

//
//  MyLayer.m
//
//  Created by Chris Miles on 14/03/11.
//  Copyright 2011 Chris Miles.
//

/*

 Animate custom property example:

lukeredpath

#if __IPHONE_OS_VERSION_MAX_ALLOWED > __IPHONE_3_2
BOOL MultiTaskingIsSupported() {
  UIDevice* device = [UIDevice currentDevice];
  BOOL backgroundSupported = NO;
  if ([device respondsToSelector:@selector(isMultitaskingSupported)]) {
    backgroundSupported = device.multitaskingSupported;
  }
  return backgroundSupported;
}
#else

shanezilla

- (void) openAppInAppStore
{
	[[NSWorkspace sharedWorkspace] openURL:[NSURL URLWithString:@"macappstore://itunes.apple.com/us/app/mathemagics/id402458650?mt=12"]];
	
	dispatch_time_t delay = dispatch_time(DISPATCH_TIME_NOW, 1 * NSEC_PER_SEC);
	dispatch_queue_t main_queue = dispatch_get_main_queue();
	dispatch_after(delay, main_queue, ^{
		[[NSWorkspace sharedWorkspace] openURL:[NSURL URLWithString:@"macappstore://itunes.apple.com/us/app/mathemagics/id402458650?mt=12"]];
	});
}

fcalderan

/* 
 * Fabrizio Calderan, twitter @fcalderan, 2010.11.02
 * I had an idea: could Inception movie be explained by a few javascript closures 
 * and variable resolution scope (just for fun)?
 * 
 * Activate javascript console =)
 */

<script>
console.group("inception movie");