bogdanbeczkowski’s gists

matthiasplappert / gist:9493050

Last active August 29, 2015 13:57

QuickLook Debugging for `UIView`

	@interface UIView (MPAdditions)
	@end

	@implementation UIView (MPAdditions)

	- (id)debugQuickLookObject {
	if (self.bounds.size.width < 0.0f \|\| self.bounds.size.height < 0.0f) {
	return nil;
	}

krzysztofzablocki / gist:6711189

Created September 26, 2013 08:03

Multiple weak call


	Wrong:
	__weak id obj;
	dispatch_async(queue, ^() {
	[obj doSomething];
	[obj doSomethingElse]; <- can turn to nil at any point, should store in strong at beggining of block
	[obj doSomethingElse2];
	});

	Ok:

AnuragMishra / DateParsingPerformanceComparison.m

Last active July 29, 2020 17:20

Compare the date parsing performance of NSDateFormatter against SQLite's date parser for parsing an iOS 8601 date.

	#import <Foundation/Foundation.h>
	#import "sqlite3.h"

	typedef int64_t timestamp;

	NSUInteger randomNumberInRange(NSUInteger start, NSUInteger end);

	// Create a sample date using the ISO-8601 format.
	// 2013-04-23T16:29:05Z
	NSString* generateSampleDate();

JaviSoto / gist:5906004

Last active June 27, 2023 10:25

Mark designated initializer at compile time

	#define MSDesignatedInitializer(__SEL__) __attribute__((unavailable("Invoke the designated initializer `" # __SEL__ "` instead.")))

	// Sample usage:

	- (instancetype)initWithObject:(id)object;
	- (instancetype)init MSDesignatedInitializer(initWithObject:); // <- This even gets auto-complete.

	// Now calling init on this class would throw a warning.

markd2 / spy.d

Created May 17, 2013 01:56

Look at objective-C messages being sent in an application running in the simulator. "Interesting" symbols (configured in the first BEGIN block, or one provided on the command line) will get stack traces dumped. "ignored" symbols are not logged.

	#!/usr/sbin/dtrace -s

	/* Run like:
	% sudo csh
	# ./spy.d $PROCESS_ID [$INTERESTING_PROBEPROV]

	Prints a line of dashes every 5 seconds to delineate different experiments.
	*/

	#pragma D option quiet

mattt / uiappearance-selector.md

Last active December 2, 2025 01:55

A list of methods and properties conforming to `UIAppearance` as of iOS 12 Beta 3

Generate the list yourself:

$ cd /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS*.sdk/System/Library/Frameworks/UIKit.framework/Headers
$ grep UI_APPEARANCE_SELECTOR ./*     | \
  sed 's/NS_AVAILABLE_IOS(.*)//g'     | \
  sed 's/NS_DEPRECATED_IOS(.*)//g'    | \
  sed 's/API_AVAILABLE(.*)//g'        | \
  sed 's/API_UNAVAILABLE(.*)//g'      | \
 sed 's/UI_APPEARANCE_SELECTOR//g' | \

albyr / traceroute 216.81.59.173

Created February 10, 2013 10:10

The results of a traceroute to 216.81.59.173

	Tracing route to FIN [216.81.59.173]:

	1 76 ms 96 ms 99 ms 192.168.1.254
	2 * * * Request timed out.
	3 18 ms 18 ms 17 ms 195.66.225.189
	4 22 ms 24 ms 24 ms 10gigabitethernet1-1.core1.lon1.he.net [195.66.224.21]
	5 24 ms 24 ms 24 ms 10gigabitethernet2-4.core1.par2.he.net [72.52.92.42]
	6 97 ms 97 ms 100 ms 10gigabitethernet7-1.core1.ash1.he.net [184.105.213.93]
	7 109 ms 109 ms 112 ms 10gigabitethernet1-2.core1.atl1.he.net [184.105.213.110]
	8 109 ms 108 ms 108 ms 216.66.0.26

subdigital / pns.m

Created January 5, 2013 21:59

What are your favorite Xcode Snippets? Add them in the comments.

	// Property Nonatomic Strong
	// Platform: All
	// Completion Scopes: ClassInterfaceMethods

	@property (nonatomic, strong) <# class_name #> *<# variable_name #>;

krzysztofzablocki / gist:4396302

Last active November 24, 2021 19:17

Set symbol breakpoint on objc_msgSend then setup this debug command to log all methods called in iOS Simulator. If you want to do device debugging change esp+4 register to r0, esp+8 to r1 Found long ago somewhere on stackoverflow.

expr -- (void)printf("[%s, %s]\n",(char *) object_getClassName(*(long*)($esp+4)), (char *) *(long *)($esp+8) )