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Hexadecimal color code for transparency

How to set transparency with hex value ?

For example, you want to set 40% alpha transparence to #000000 (black color), you need to add 66 like this #66000000.

Download This sample on Google Play Store

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public abstract class EndlessRecyclerViewScrollListener extends RecyclerView.OnScrollListener {
    // The minimum amount of items to have below your current scroll position
    // before loading more.
    private int visibleThreshold = 5;

    // The current offset index of data you have loaded
    private int currentPage = 0;

    // The total number of items in the dataset after the last load
    private int previousTotalItemCount = 0;

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Generate the list yourself:

$ cd /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS*.sdk/System/Library/Frameworks/UIKit.framework/Headers
$ grep -H UI_APPEARANCE_SELECTOR ./* | sed 's/ __OSX_AVAILABLE_STARTING(__MAC_NA,__IPHONE_5_0) UI_APPEARANCE_SELECTOR;//'

---

UIActivityIndicatorView

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/*
Copied and pasted from David Hamrick's blog:

Source: http://www.davidhamrick.com/2011/12/31/Changing-the-UINavigationController-animation-style.html
*/

@interface UINavigationController (Fade)

- (void)pushFadeViewController:(UIViewController *)viewController;
- (void)fadePopViewController;

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@private
    NSManagedObjectContext *managedObjectContext_;
    NSManagedObjectModel *managedObjectModel_;
    NSPersistentStoreCoordinator *persistentStoreCoordinator_;


@property (nonatomic, retain, readonly) NSManagedObjectContext *managedObjectContext;
@property (nonatomic, retain, readonly) NSManagedObjectModel *managedObjectModel;
@property (nonatomic, retain, readonly) NSPersistentStoreCoordinator *persistentStoreCoordinator;

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- (BOOL)  tabBarController:(UITabBarController *)tabBarController
shouldSelectViewController:(UIViewController *)viewController {

    // http://stackoverflow.com/questions/5161730/iphone-how-to-switch-tabs-with-an-animation
    NSUInteger controllerIndex = [self.viewControllers indexOfObject:viewController];

    if (controllerIndex == tabBarController.selectedIndex) {
        return NO;
    }

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#import <UIKit/UIKit.h>

@interface BouncyButtonViewController : UIViewController

@end

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    NSMutableArray *animations = [NSMutableArray array];
    // Step 1
    {
        CABasicAnimation *animation = [CABasicAnimation animationWithKeyPath:@"transform.scale"];
        animation.toValue = @(1.3);
        animation.duration = 0.3;
        animation.fillMode = kCAFillModeForwards;
        [animations addObject:animation];
    }
    {

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// Swift 2.2 syntax / API

import UIKit

extension UIBezierPath {

    class func arrow(from start: CGPoint, to end: CGPoint, tailWidth: CGFloat, headWidth: CGFloat, headLength: CGFloat) -> Self {
        let length = hypot(end.x - start.x, end.y - start.y)
        let tailLength = length - headLength