Mike Abdullah mikeabdullah

mikeabdullah / gist:2217400

Created March 27, 2012 15:54

DON'T insert other objects from -awakeFromInsert like this example does

	- (void)awakeFromInsert
	{
	[super awakeFromInsert];

	Partner *partner = [NSEntityDescription
	insertNewObjectForEntityForName:@"Partner"
	inManagedObjectContext:[self managedObjectContext]];

	[self setPartner:partner];
	}

mikeabdullah / gist:2367295

Created April 12, 2012 13:35

Giving -[NSArrayController add:] a completion block

	- (void)addWithCompletionHandler:(void (^)(id object))completionHandler;
	{
	[self commitEditingWithDelegate:self
	didCommitSelector:@selector(controller:didCommit:contextInfo:)
	contextInfo:[completionHandler copy]];
	}

	- (void)controller:(NSArrayController )editor didCommit:(BOOL)didCommit contextInfo:(void )contextInfo;
	{
	void (^completionHandler)(id object) = contextInfo;

mikeabdullah / gist:2480081

Created April 24, 2012 14:24

Passing nil to -isEqualToString:

	NSString *string = @"test";
	BOOL result = [string isEqualToString:nil];

mikeabdullah / gist:2480093

Created April 24, 2012 14:26

Passing nil to -isEqualToNumber:

	NSNumber *number = [NSNumber numberWithInt:0];
	BOOL result = [number isEqualToNumber:nil];

mikeabdullah / gist:2480126

Created April 24, 2012 14:32

Calling equality testing methods on nil

	NSString *string = nil;
	BOOL result = [string isEqualToString:@""];

	NSNumber *number = nil;
	BOOL result = [number isEqualToNumber:[NSNumber numberWithInt:0]];

mikeabdullah / gist:2836559

Created May 30, 2012 14:08

Etched appearance labels

[[textField cell] setBackgroundStyle:NSBackgroundStyleRaised];

mikeabdullah / gist:3052841

Created July 5, 2012 10:28 — forked from itod/objc_closure.m

Objective-C Closure

	// compiled with ARC enabled

	NSArray *foo() {
	NSMutableArray *res = [NSMutableArray array];
	for (int i = 0; i < 3; i++) {
	[res addObject:^{
	NSLog(@"%d", i);
	}];
	}
	return res;

mikeabdullah / gist:3116322

Created July 15, 2012 11:18

Safely wrapping keychain passwords with NSString/CFString

	void freeKeychainContent(void ptr, void info)
	{
	SecKeychainItemFreeContent(NULL, ptr);
	}

	- (NSString *)passwordFromKeychainItem:(SecKeychainItemRef)keychainItem
	{
	void *passwordData;
	UInt32 passwordLength;
	OSStatus status = SecKeychainItemCopyContent(keychainItem,

mikeabdullah / NSManagedObjectContextShim.h

Created July 26, 2012 10:20 — forked from danielctull/ThreadedManagedObjectContext.h

NSManagedObjectContext for iOS 4. Maybe?

	/*
	NSManagedObjectContextShim.h
	NSManagedObjectContextShim

	Created by Daniel Tull on 25.07.2012.



	Copyright (c) 2012 Daniel Tull. All rights reserved.

mikeabdullah / gist:3200382

Created July 29, 2012 17:22

Power assertion example

	// Begin the power assertion
	IOPMAssertionID assertionID;
	IOReturn asserted = IOPMAssertionCreateWithName(kIOPMAssertionTypeNoIdleSleep,
	kIOPMAssertionLevelOn,
	CFSTR("Sandvox Publishing"),
	&assertionID);
	if (asserted != kIOReturnSuccess) // handle the error; log it or something

	// Do your long-running work