cbowns

// An example of a model object with a boolean property
// that's backed by an NSNumber from a JSON response

@interface ModelObject : NSObject

@property (nonatomic, assign, getter = isEnabled) BOOL enabled;

@end

@interface ModelObject ()

cbowns

# In the debugger:
# (fill in <home> and <image> below with your user path and the image's ivar

p (BOOL)[(NSFileManager *)[NSFileManager defaultManager] createFileAtPath:@"<home>/Desktop/image.png" contents:(void *)UIImagePNGRepresentation(<image>) attributes:nil]

cbowns

//
//  UIApplication+NetworkActivity.h
//
//  Created by Christopher Bowns on 4/11/12.
//  Original implementation: http://stackoverflow.com/a/6978817/774
//  Copyright (c) 2012 Mechanical Pants Software
//

#import <UIKit/UIKit.h>

cbowns

- (CGPoint)center:(CGPoint)oldCenter movedFromAnchorPoint:(CGPoint)oldAnchorPoint toAnchorPoint:(CGPoint)newAnchorPoint withFrame:(CGRect)frame;
{
	CGPoint anchorPointDiff = CGPointMake(newAnchorPoint.x - oldAnchorPoint.x, newAnchorPoint.y - oldAnchorPoint.y);
	CGPoint newCenter = CGPointMake(oldCenter.x + (anchorPointDiff.x * frame.size.width), 
									oldCenter.y + (anchorPointDiff.y * frame.size.height));
	return newCenter;
}

cbowns

/*
 System Versioning Preprocessor Macros via http://stackoverflow.com/questions/3339722/check-iphone-ios-version
 
 Example:
 if (UIDeviceSystemVersionLessThan(@"4.0")) {
 // code for pre-4.0 devices.
 }
 
 if (UIDeviceSystemVersionGreaterThanOrEqualTo(@"3.1.1")) {
 // Code for 3.1.1.

cbowns

//
//  IPInsetLabel.h
//  Instapaper
//
//  Created by Marco Arment on 7/23/11.
//  Copyright 2011 Instapaper LLC, released to the public domain.
//

#import <UIKit/UIKit.h>

cbowns

// JSON is dangerous, take one of these!

+ (id)nullGuardedDict:(NSDictionary *)dict valueForKey:(NSString *)key;
{
	id obj = nil;
	obj = [dict valueForKey:key];
	if (obj == [NSNull null]) {
		obj = nil;
	}
	return obj;

cbowns

#!/usr/bin/ruby
#Just run this script in a terminal window, leaving the window open in the
#background so it can continue to process messages.
IO.popen("syslog -F \'$(Sender): $Message\' -w -k Sender com.apple.backupd") { |syslogIO|
	while (inputString = syslogIO.gets) do
		escapedString = inputString.gsub("'", "\\'")
		`/usr/local/bin/growlnotify -a 'Time Machine' -t 'Time Machine' -m '#{escapedString}'`
	end
}

cbowns

//
//  UIImage+MPImageNamedNilCheck.h
//
//  Created by Christopher Bowns on 5/6/12.
//  Copyright (c) 2012 Mechanical Pants Software. All rights reserved.
//

#import <UIKit/UIKit.h>

@interface UIImage (MPImageNamedNilCheck)

cbowns

// Please don’t do this.


// Need to change UISearchBar’s cancel button text?
// Well, there’s no API for that.

// (Sorry UIKit.)

UISearchBar *searchBar = [self.searchDisplayController searchBar];
for (UIView *view in [searchBar subviews]) { … <left as an exercise to the adventurous> }