drance

@implementation BHSCollectionViewFlowLayout

- (NSArray *)layoutAttributesForElementsInRect:(CGRect)rect {
    NSArray *allAttrs = [super layoutAttributesForElementsInRect:rect];
    for (UICollectionViewLayoutAttributes *attributes in allAttrs) {
        attributes.frame = CGRectIntegral(attributes.frame);
    }
    return allAttrs;
}

MugunthKumar

#if ! __has_feature(objc_arc)
#error This file/class is targeted for the ARC compiler. Either turn on ARC for your project or use -fobjc-arc flag
#endif

krzysztofzablocki

//! for gesture recognizer support in cocos2d use https://github.com/krzysztofzablocki/CCNode-SFGestureRecognizers
- (void)handlePanGesture:(UIPanGestureRecognizer*)gestureRecognizer
{
    CGPoint location = [[CCDirector sharedDirector] convertToGL:[gestureRecognizer locationInView:gestureRecognizer.view]];
    static CGPoint oldLocation;
    
    //! this will make sure that oldLocation is initialized
    if (gestureRecognizer.state != UIGestureRecognizerStateBegan) {
        //! we need to calculate angle difference between previous position and current one in regards to dial center
        CGPoint firstDir = ccpSub(oldLocation, dial.position);

tonyarnold

//
//  NSUserDefaults+ObjectSubscripting.h
//
//  Created by Tony Arnold on 29/07/12.
//  Copyright (c) 2012 The CocoaBots. All rights reserved.
//

#import <Foundation/Foundation.h>

@interface NSUserDefaults (ObjectSubscripting)

eoghain

#import "SBJson.h"
#import <Foundation/Foundation.h>
#import <objc/runtime.h>

@interface MYJSONSerialization : NSObject

+ (NSData *)dataWithJSONObject:(id)obj options:(NSJSONWritingOptions)opt error:(NSError **)error;
+ (id)JSONObjectWithData:(NSData *)data options:(NSJSONReadingOptions)opt error:(NSError **)error;

@end

hollance

Communicate between objects using channels

When you have two objects A and B, say two view controllers, that you want to have talk to each other, you can choose from the following options:

• NSNotificationCenter. This is anonymous one-to-many communication. Object A posts a notification to the NSNotificationCenter, which then distributes it to any other objects listening for that notification, including Object B. A and B do not have to know anything about each other, so this is a very loose coupling. Maybe a little too loose...

• KVO (Key-Value Observing). One object observes the properties of another. This is a very tight coupling, because Object B is now peeking directly into Object A. The advantage of KVO is that Object A doesn't have to be aware of this at all, and therefore does not need to send out any notifications -- the KVO mechanism takes care of this behind the scenes.

• Direct pointers. Object A has a pointer to Object B and directly sends it messages when something of interest h

jinthagerman

// http://stackoverflow.com/questions/1560081/how-can-i-create-a-uicolor-from-a-hex-string
+ (UIColor *) colorWithHex:(int)hex {
return [UIColor colorWithRed:((float)((hex & 0xFF0000) >> 16))/255.0
                       green:((float)((hex & 0xFF00) >> 8))/255.0 
                        blue:((float)(hex & 0xFF))/255.0 alpha:1.0];
}