akdsouza

// Start here https://developers.facebook.com/docs/getting-started/getting-started-with-the-ios-sdk/
// Install the Facebook SDK, get it linked up, create an app, and get that setup correctly 
// in your info.plist, appDelegate, and build settings.  

//Note: This example uses ARC. If you aren't using ARC, made sure to release/retain objects as needed.


//Now for the fun part.

////////////////////////////

akdsouza

Add HeaderView in UICollectionView like UITableView's tableHeaderView:

{
    [self.collectionView registerNib:[UINib nibWithNibName:@"HeaderView" bundle:nil]
          forSupplementaryViewOfKind:UICollectionElementKindSectionHeader
                 withReuseIdentifier: @"HeaderView"];
}
- (UICollectionReusableView *)collectionView:(UICollectionView *)collectionView   viewForSupplementaryElementOfKind:(NSString *)kind  atIndexPath:(NSIndexPath *)indexPath{
    if ([kind isEqualToString:UICollectionElementKindSectionHeader]){
        UICollectionReusableView *view = [collectionView dequeueReusableSupplementaryViewOfKind:kind   withReuseIdentifier:@"HeaderView" forIndexPath:indexPath];

akdsouza

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    
    NSString *info = @"http://codeafterhours.wordpress.com";
    
    // Generation of QR code image
    NSData *qrCodeData = [info dataUsingEncoding:NSISOLatin1StringEncoding]; // recommended encoding
    CIFilter *qrCodeFilter = [CIFilter filterWithName:@"CIQRCodeGenerator"];
    [qrCodeFilter setValue:qrCodeData forKey:@"inputMessage"];

akdsouza

#apks
glob:*.apk
glob:*.ap_

# files for the dex VM
glob:*.dex

# Java class files
glob:*.class

akdsouza

-(void) updateCountdown {
    NSTimeInterval timeToClosing = [_deleteDate timeIntervalSinceDate:[NSDate date]];
    
    div_t h = div(timeToClosing, 3600);
    int hours = h.quot;
    div_t m = div(h.rem, 60);
    int minutes = m.quot;
    int seconds = m.rem;
    
    NSString *hoursStr, *minutesStr, *secondsStr;

akdsouza

- (void)observeJSContext
{
    CFRunLoopRef runLoop = CFRunLoopGetCurrent();
    
    // This is a idle mode of RunLoop, when UIScrollView scrolls, it jumps into "UITrackingRunLoopMode"
    // and won't perform any cache task to keep a smooth scroll.
    CFStringRef runLoopMode = kCFRunLoopDefaultMode;
    
    CFRunLoopObserverRef observer = CFRunLoopObserverCreateWithHandler
    (kCFAllocatorDefault, kCFRunLoopBeforeWaiting, true, 0, ^(CFRunLoopObserverRef observer, CFRunLoopActivity _) {

akdsouza

// Taken from the commercial iOS PDF framework http://pspdfkit.com.
// Copyright (c) 2014 Peter Steinberger, PSPDFKit GmbH. All rights reserved.
// Licensed under MIT (http://opensource.org/licenses/MIT)
//
// You should only use this in debug builds. It doesn't use private API, but I wouldn't ship it.

// PLEASE DUPE rdar://27192338 (https://openradar.appspot.com/27192338) if you would like to see this in UIKit.

#import <objc/runtime.h>
#import <objc/message.h>

akdsouza

/*
 Swift Programming Language Guide
 "A Swift Tour" Solutions
 https://developer.apple.com/library/prerelease/ios/documentation/Swift/Conceptual/Swift_Programming_Language/GuidedTour.html#//apple_ref/doc/uid/TP40014097-CH2-XID_1
 
 These are the solutions to all the "experiments" in the pre-release Swift Programming Guide 
 (released on the same day Apple announced Swift). A couple of things worth noting:
 
 1. Swift syntax, e.g. array declarations, has changed since I releasd these. So this code will 
    probably cause some errors when you paste it into a playground. Should be easy enough to fix 

akdsouza

/* Allow Landscape mode for specific ViewControllers */
-(UIInterfaceOrientationMask)application:(UIApplication *)application supportedInterfaceOrientationsForWindow:(UIWindow *)window {
    UIViewController* topVC = [self topViewControllerWith: self.window.rootViewController];
    if ([topVC respondsToSelector:@selector(canRotate)]) {
        return UIInterfaceOrientationMaskAllButUpsideDown;
    }
    return UIInterfaceOrientationMaskPortrait;
}

/* get the top ViewController */

akdsouza

/*
This is an update to an example found on http://www.jairobjunior.com/blog/2016/03/05/how-to-rotate-only-one-view-controller-to-landscape-in-ios-slash-swift/

The code there works, with some updating to the latest Swift, but the pattern isn't very Swifty. The following is what I found to be more helpful.
*/

/*
First, create a protocol that UIViewController's can conform to.
This is in opposition to using `Selector()` and checking for the presence of an empty function.
*/