insidegui

struct ScrollViewOffsetPreferenceKey: PreferenceKey {
    static var defaultValue: CGPoint = .zero
    
    static func reduce(value: inout CGPoint, nextValue: () -> CGPoint) {
        value = nextValue()
        print("value = \(value)")
    }
    
    typealias Value = CGPoint

christianselig

# Convert from H264 to H265
ffmpeg -i in.mov -c:v libx265 -an -x265-params crf=20 output.mp4

# Tag as HVC instead of HEV1 so iOS can play it
ffmpeg -i output.mp4 -vcodec copy -acodec copy -tag:v hvc1 output2.mp4

# Bonus: it can take a second to play (no more than H264) so here's how to generate 
# a thumbnail of the first frame to embed in your view as a placeholder.
ffmpeg -i output2.mp4 -vf "select=eq(n\,34)" -vframes 1 thumbnail.png

ole

# (File moved to https://github.com/ole/Storyboard-Strings-Extraction)

twobitlabs

// http://cocoawithlove.com/2009/10/ugly-side-of-blocks-explicit.html has a nice breakdown of the syntax--it helps to think of the ^ as similar to a pointer dereference symbol *

// block typedef:

    typedef void(^Block)();
    typedef void(^ConditionalBlock)(BOOL);
    typedef NSString*(^BlockThatReturnsString)();
    typedef NSString*(^ConditionalBlockThatReturnsString)(BOOL);

// block property with typedef:

kreeger

/*
 *  BDKCollectionIndexView.h
 */

#import <UIKit/UIKit.h>

/** The direction in which the control is oriented. Assists in determining layout values.
 */
typedef enum {
    BDKCollectionIndexViewDirectionVertical = 0,

kreeger

BDKCollectionIndexView

An index-title-scrubber-bar, for use with a UICollectionView (or even a PSTCollectionView). Gives a collection view the index title bar for -sectionIndexTitles that a UITableView gets for (almost) free. A huge thank you to @Yang from [this Stack Overflow post][so], which saved my bacon here.

The problem

When you're using a UITableView and you define the UITableViewDataSource method -sectionIndexTitlesForTableView:, you get a sweet right-hand-side view for scrubbing through a long table view of fields, separated by sections. The titles are the names of the sections, by default (or at least letters based on the section names).