James Tang jamztang

Accessing an API using CoreData's NSIncrementalStore

Note: the original location of this article is on my blog, however, it is posted here too for better readability.

In this article, we will see how to use Core Data for accessing your API. We will use the Bandcamp API as our running example. I've only been experimenting with this code for a few days, so there might be mistakes in there.

	// Created by Jamz Tang 2012-06-02
	// http://ioscodesnippet.com/post/24203288551/quickly-switch-supported-uiinterfaceorientation-for

	// Convert UIInterfaceOrientation to NSString, so we can compare it
	static inline NSString *NSStringFromUIInterfaceOrientation(UIInterfaceOrientation orientation) {
	switch (orientation) {
	case UIInterfaceOrientationPortrait: return @"UIInterfaceOrientationPortrait";
	case UIInterfaceOrientationPortraitUpsideDown: return @"UIInterfaceOrientationPortraitUpsideDown";
	case UIInterfaceOrientationLandscapeLeft: return @"UIInterfaceOrientationLandscapeLeft";
	case UIInterfaceOrientationLandscapeRight: return @"UIInterfaceOrientationLandscapeRight";

	# show log tree (one-line per commit)
	git config --global alias.logtree "log --graph --pretty=oneline --abbrev-commit"

	# show log tree (detailed)
	git config --global alias.logtreelong "log --graph"

	//
	// The blog post which described this dedicated problem
	// http://mystcolor.me/post/23158981244/uipopovercontroller-and-orientation-positioning-problem
	//

	typedef void (^PopoverControllerPresentationBlock)(void);

	@interface ViewController () <UIPopoverControllerDelegate>
	@property (nonatomic, strong) UIPopoverController *popoverController;
	@property (nonatomic, copy) PopoverControllerPresentationBlock popoverControllerPresentationBlock;

	//
	// NSObject+PropertyListing.h
	// PropertyFun
	//
	// Created by Andrew Sardone on 8/27/10.
	//

	#import <Foundation/Foundation.h>

	UIColor* UIColorFromHex(NSInteger colorInHex) {
	// colorInHex should be value like 0xFFFFFF
	return [UIColor colorWithRed:((float) ((colorInHex & 0xFF0000) >> 16)) / 0xFF
	green:((float) ((colorInHex & 0xFF00) >> 8)) / 0xFF
	blue:((float) (colorInHex & 0xFF)) / 0xFF
	alpha:1.0];
	}

	//
	// gist+example.m
	// This is an example of embedding an objective-c implementation file in gist

	- (BOOL)testMethod {
	// Supports syntax highlighting
	return YES;
	}

	// Call theResume() to stop the semaphore from blocking/waiting.
	// Failure to call theResume() will cause the test to hang.
	// This is needed to test asynchronous operations. See https://gist.github.com/2215212
	- (void)dispatchSemaphoreInBlock:(void (^)(void (^theResume)(void)))theBlock {
	dispatch_semaphore_t theSemaphore = dispatch_semaphore_create(0);
	theBlock(^{ dispatch_semaphore_signal(theSemaphore); });
	while (dispatch_semaphore_wait(theSemaphore, DISPATCH_TIME_NOW)) {
	[[NSRunLoop currentRunLoop] runMode:NSDefaultRunLoopMode beforeDate:[NSDate dateWithTimeIntervalSinceNow:0.1]];
	}
	dispatch_release(theSemaphore);

	// Original Reference: http://stackoverflow.com/questions/1637604/method-swizzle-on-iphone-device

	#import <objc/runtime.h>
	#import <objc/message.h>
	//....

	void Swizzle(Class c, SEL orig, SEL new)
	{
	Method origMethod = class_getInstanceMethod(c, orig);
	Method newMethod = class_getInstanceMethod(c, new);

	Copyright (c) 2013 Jamz Tang <[email protected]>

	Permission is hereby granted, free of charge, to any person obtaining a copy
	of this software and associated documentation files (the "Software"), to deal
	in the Software without restriction, including without limitation the rights
	to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
	copies of the Software, and to permit persons to whom the Software is furnished
	to do so, subject to the following conditions:

	The above copyright notice and this permission notice shall be included in all