smileyborg

// UICollectionView Objective-C example

- (void)viewWillAppear:(BOOL)animated {
    [super viewWillAppear:animated];
        
    NSIndexPath *selectedIndexPath = [[self.collectionView indexPathsForSelectedItems] firstObject];
    if (selectedIndexPath != nil) {
        id<UIViewControllerTransitionCoordinator> coordinator = self.transitionCoordinator;
        if (coordinator != nil) {
            [coordinator animateAlongsideTransition:^(id<UIViewControllerTransitionCoordinatorContext> context) {

ian-mcdowell

#import <objc/runtime.h>

@interface DebuggingOverlay: NSObject

@end

@implementation DebuggingOverlay

+ (void)toggleOverlay {
    id debugInfoClass = NSClassFromString(@"UIDebuggingInformationOverlay");

KyNorthstar

//
//  NSWindow+Fade.swift
//  BH Bezel Notification
//
//  Created by Ben Leggiero on 2017-11-09.
//  Translated to Swift 4 from the original (ObjC): https://gist.github.com/indragiek/1397050
//  Copyright © 2017 Ben Leggiero. All rights reserved.
//

import Foundation

hborders

#import "MyNonClusteredClass.h"

@interface GenericIsKindOfClass<ObjectType : MyNonClusteredClass *> : NSObject

+ (instancetype _Nonnull)new NS_UNAVAILABLE;
- (instancetype _Nonnull)init NS_UNAVAILABLE;
- (instancetype _Nonnull)initWithInstanceOfObjectType:(ObjectType _Nonnull)instanceOfObjectType NS_DESIGNATED_INITIALIZER;

- (ObjectType _Nullable)typeSafeDowncastOrNil:(NSObject * _Nonnull)object;

Catfish-Man

As of iOS 11/macOS High Sierra, and only including ones in Foundation and CoreFoundation

Strings:

_NSCFString - a CFStringRef or CFMutableStringRef. This is the most common type of string object currently.
    - May have 8 bit (ASCII) or 16 bit (UTF-16) backing store
_NSCFConstantString - a compile time constant CFStringRef, like you'd get with @"foo"
    - May also be generated by dynamic string creation if matches a string in a pre-baked table of common strings called the StringROM
NSBigMutableString - an NSString backed by a CFStorage (https://github.com/opensource-apple/CF/blob/master/CFStorage.h) for faster handling of very large strings
NSCheapMutableString - a very limited NSMutableString that allows for zero-copy initialization. Used in NSFileManager for temporarily wrapping stack buffers.

Catfish-Man

#import <Foundation/Foundation.h>
#import <time.h>
#import <os/lock.h>

#define ITERS 2000
#define NSEC_PER_ITER(time) (((double)time * (double)NSEC_PER_SEC) / (double)ITERS)

#define TEST(body, name) do {\
    start = [NSDate date];\
    for (int i = 0; i < ITERS; i++) {\

mayoff

@import Foundation;
@import CoreGraphics;

typedef struct __attribute__((objc_boxable)) CGPoint CGPoint;
typedef struct __attribute__((objc_boxable)) CGSize CGSize;
typedef struct __attribute__((objc_boxable)) CGRect CGRect;
typedef struct __attribute__((objc_boxable)) CGVector CGVector;

int main(int argc, const char * argv[]) {
    @autoreleasepool {

Tricertops

// Macros for creating NSArray and NSSet objects as replacement for @[…] literal.

let components = NSArray(street, city, state, country);

// Advantages:
//  1. Type of NSArray is inferred, in this case it’s NSArray<NSString *> *
//  2. List of objects is type-checked, so mixing types like NSArray(@42, @"Hi") will report compilation error.
//  3. Ability to allocate any class, not just NSArray. For example NSSet and NSMutableArray.
//  4. Avoids stupid clang bracket matching bug, if you know what I mean.

michaelochs

NSDate *date = [NSDate new];

NSDateFormatter *dateFormatter = [NSDateFormatter new];
dateFormatter.locale = [NSLocale localeWithLocaleIdentifier:@"nl_NL"];
dateFormatter.dateStyle = NSDateFormatterFullStyle;
dateFormatter.formattingContext = NSFormattingContextDynamic; // this is the important setting

NSString *dateString = [dateFormatter stringFromDate:date];

NSString *s1 = [NSString stringWithFormat:@"Foo %@", dateString]; // "Foo dinsdag 13 december 2016"

richard-flosi

// Created by Derrick Cohodas (dav-)
// Based on the Python example by StackExchange user wwnick from http://gis.stackexchange.com/a/415/41129 


// Requires the Mathjs library - http://mathjs.org/
var math = require('mathjs')

/**
 * Represents a coordinate with a distance
 * @param {Number} lat  Latitude