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View ffmpeg-ios.txt
# 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
@insidegui
insidegui / ScrollViewOffsetModifier.swift
Created Jul 20, 2021
A SwiftUI ViewModifier that can be used to read a ScrollView's offset and store it into a @State property of the view
View ScrollViewOffsetModifier.swift
struct ScrollViewOffsetPreferenceKey: PreferenceKey {
static var defaultValue: CGPoint = .zero
static func reduce(value: inout CGPoint, nextValue: () -> CGPoint) {
value = nextValue()
print("value = \(value)")
}
typealias Value = CGPoint
@ole
ole / update_storyboard_strings.sh
Last active May 9, 2021
Automatically extract translatable strings from Xcode storyboards and update .strings files. Original version by MacRumors forum user mikezang (http://forums.macrumors.com/showpost.php?p=16060008&postcount=4). Slightly updated by Ole Begemann. NOTE: this Gist moved to a regular repo at https://github.com/ole/Storyboard-Strings-Extraction.
View update_storyboard_strings.sh
# (File moved to https://github.com/ole/Storyboard-Strings-Extraction)
View BDKCollectionIndexView.markdown

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).

UITableView with section index titles

@kreeger
kreeger / BDKCollectionIndexView.m
Created Feb 11, 2013
An index-title-scrubber-bar, for use with a UICollectionView (or even a PSTCollectionView). Gives a collection view the index title bar that a UITableView gets for (almost) free. A huge thank you to @yang from http://stackoverflow.com/a/14443540/194869, which saved my bacon here.
View BDKCollectionIndexView.m
/*
* BDKCollectionIndexView.h
*/
#import <UIKit/UIKit.h>
/** The direction in which the control is oriented. Assists in determining layout values.
*/
typedef enum {
BDKCollectionIndexViewDirectionVertical = 0,
View gist:4226365
// 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: