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@interface AppDelegate : UIResponder <UIApplicationDelegate>

@property (strong, nonatomic) IBOutlet UIWindow *window;
@property ( strong ) IBOutlet UITextField * textField ;
@end

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//
//  PropertyContainer.h
//
//  Created by Niels Gabel on 12/14/11.
//  Copyright (c) 2011 DoubleDutch Inc. All rights reserved.
//

#import <Foundation/Foundation.h>

@interface PropertyContainer : NSObject

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@implementation UIView (PositionAtCenter)

-(void)centerPixelAligned:(CGPoint)p
{
    CGSize size = self.bounds.size ;

    p.x = floorf( p.x ) + 0.5 * fmodf( size.width, 2.0f ) ;
    p.y = floorf( p.y ) + 0.5 * fmodf( size.height, 2.0f ) ;

    self.center = p;

nielsbot

Adds support for loading UIImage's from PDF files. I think it's a great way to add resolution-independent graphics to your apps, and also remove the "export to bitmap" step from your workflow. Just save directly from Illustrator!

What it does:

- You can pass the name of a PDF file (with or without the '.pdf') to +[UIImage imageNamed:]
- You can use the name of a PDF file inside Interface Builder, in your UIImageView's
- Turn a multi-page PDF into an array of UIImage's... good for animation.

Feedback to gists @nielsbot.com. Thanks!

nielsbot

//
//  profiler.h
//  Quick and dirty profiler
//
//  Created by Niels Gabel on 9/1/08.
//
//	Copyright 2008-2011 Niels Gabel
//
//	Licensed under the Apache License, Version 2.0 (the "License");
//	you may not use this file except in compliance with the License.

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// this code will cause a UIView to shake--good for "login error"

CAKeyframeAnimation * anim = [ CAKeyframeAnimation animationWithKeyPath:@"transform" ] ;
anim.values = [ NSArray arrayWithObjects:
                   [ NSValue valueWithCATransform3D:CATransform3DMakeTranslation(-5.0f, 0.0f, 0.0f) ],
                   [ NSValue valueWithCATransform3D:CATransform3DMakeTranslation(5.0f, 0.0f, 0.0f) ], 
                   nil ] ;
anim.autoreverses = YES ;
anim.repeatCount = 2.0f ;
anim.duration = 0.07f ;

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#import <Foundation/Foundation.h>

extern UIImage * UIImageWithJPEG2000Data( NSData * data ) ;