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	<title>Objective-C Archives - Richard Warrender</title>
	<atom:link href="https://richardwarrender.com/category/programming/objective-c/feed/" rel="self" type="application/rss+xml" />
	<link>https://richardwarrender.com/category/programming/objective-c/</link>
	<description>Creative Thinking, Clear Engineering</description>
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		<title>Encrypt data using AES and 256-bit keys</title>
		<link>https://richardwarrender.com/2016/04/encrypt-data-using-aes-and-256-bit-keys/</link>
					<comments>https://richardwarrender.com/2016/04/encrypt-data-using-aes-and-256-bit-keys/#comments</comments>
		
		<dc:creator><![CDATA[Richard Warrender]]></dc:creator>
		<pubDate>Wed, 27 Apr 2016 19:06:29 +0000</pubDate>
				<category><![CDATA[Encryption]]></category>
		<category><![CDATA[Objective-C]]></category>
		<category><![CDATA[Programming]]></category>
		<category><![CDATA[AES]]></category>
		<category><![CDATA[AES-256]]></category>
		<category><![CDATA[C]]></category>
		<category><![CDATA[CommonCrypto]]></category>
		<category><![CDATA[encryption]]></category>
		<category><![CDATA[iOS]]></category>
		<category><![CDATA[Mac OS X]]></category>
		<category><![CDATA[openssl]]></category>
		<category><![CDATA[programming]]></category>
		<guid isPermaLink="false">https://richardwarrender.com/?p=936</guid>

					<description><![CDATA[AES stands for Advanced Encryption Standard and is an industry-standard algorithm for encrypting data symmetrically which even the US government has approved for SECRET documents. If you don&#8217;t know what symmetrical encryption is, it means that you use the same key or password to encrypt the data as you do to unencrypt it. So you [&#8230;]]]></description>
		
					<wfw:commentRss>https://richardwarrender.com/2016/04/encrypt-data-using-aes-and-256-bit-keys/feed/</wfw:commentRss>
			<slash:comments>14</slash:comments>
		
		
		<post-id xmlns="com-wordpress:feed-additions:1">936</post-id>	</item>
		<item>
		<title>Quick way of cleaning HTML for iOS apps</title>
		<link>https://richardwarrender.com/2016/04/quick-way-of-cleaning-html-ios/</link>
					<comments>https://richardwarrender.com/2016/04/quick-way-of-cleaning-html-ios/#respond</comments>
		
		<dc:creator><![CDATA[Richard Warrender]]></dc:creator>
		<pubDate>Tue, 05 Apr 2016 19:59:15 +0000</pubDate>
				<category><![CDATA[Objective-C]]></category>
		<category><![CDATA[Programming]]></category>
		<category><![CDATA[C]]></category>
		<category><![CDATA[Cocoa]]></category>
		<category><![CDATA[Cocoa Touch]]></category>
		<category><![CDATA[DOM]]></category>
		<category><![CDATA[HTML]]></category>
		<category><![CDATA[programming]]></category>
		<category><![CDATA[web]]></category>
		<guid isPermaLink="false">https://richardwarrender.com/?p=918</guid>

					<description><![CDATA[For some reason HTML is always dirty, it&#8217;s usually full of Analytics tags, JavaScript or contains nested HTML tags. This is usually fine for displaying in browsers but at some point an iOS app will need to display HTML content and usually when it does, you need it to display clean HTML or only a [&#8230;]]]></description>
		
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			<slash:comments>0</slash:comments>
		
		
		<post-id xmlns="com-wordpress:feed-additions:1">918</post-id>	</item>
		<item>
		<title>5 Time-saving Objective-C tips every developer should know</title>
		<link>https://richardwarrender.com/2013/03/5-time-saving-objective-c-tips/</link>
					<comments>https://richardwarrender.com/2013/03/5-time-saving-objective-c-tips/#comments</comments>
		
		<dc:creator><![CDATA[Richard Warrender]]></dc:creator>
		<pubDate>Tue, 19 Mar 2013 18:18:03 +0000</pubDate>
				<category><![CDATA[Cocoa]]></category>
		<category><![CDATA[Objective-C]]></category>
		<category><![CDATA[Programming]]></category>
		<category><![CDATA[UIKit]]></category>
		<category><![CDATA[consts]]></category>
		<category><![CDATA[enums]]></category>
		<category><![CDATA[git]]></category>
		<category><![CDATA[programming]]></category>
		<category><![CDATA[tips]]></category>
		<guid isPermaLink="false">http://richardwarrender.com/?p=623</guid>

					<description><![CDATA[Here&#8217;s a quick fire list of 5 time-saving Objective-C tips that every developer should know. Perfect for making time for that extra coffee! 1. Enum shorthand Enums at their simplest are labelled sets of integers. Where an inexperienced programmer might use a number to represent the download state of an image lets say, e.g. 0 [&#8230;]]]></description>
		
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			<slash:comments>1</slash:comments>
		
		
		<post-id xmlns="com-wordpress:feed-additions:1">623</post-id>	</item>
		<item>
		<title>Core Animation stops animation on app relaunch</title>
		<link>https://richardwarrender.com/2011/09/core-animation-stops-ani-on-app-relaunch/</link>
					<comments>https://richardwarrender.com/2011/09/core-animation-stops-ani-on-app-relaunch/#comments</comments>
		
		<dc:creator><![CDATA[Richard Warrender]]></dc:creator>
		<pubDate>Mon, 19 Sep 2011 12:31:44 +0000</pubDate>
				<category><![CDATA[Core Animation]]></category>
		<category><![CDATA[Objective-C]]></category>
		<category><![CDATA[Programming]]></category>
		<category><![CDATA[Swift]]></category>
		<category><![CDATA[UIKit]]></category>
		<category><![CDATA[Cocoa Touch]]></category>
		<category><![CDATA[Core Animaton]]></category>
		<category><![CDATA[iphone]]></category>
		<category><![CDATA[multitasking]]></category>
		<category><![CDATA[programming]]></category>
		<guid isPermaLink="false">http://richardwarrender.com/?p=385</guid>

					<description><![CDATA[On one of my projects I discovered a bug in a never-ending animation I had set up. Whenever the app was suspended (such as when you multitask and open another app), on relaunching the app the animation was frozen. After some investigating, I discovered that with Core Animation you need to set a flag on [&#8230;]]]></description>
		
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			<slash:comments>3</slash:comments>
		
		
		<post-id xmlns="com-wordpress:feed-additions:1">385</post-id>	</item>
		<item>
		<title>Calculating UNIX file permissions</title>
		<link>https://richardwarrender.com/2011/06/calculating-unix-file-permissions/</link>
					<comments>https://richardwarrender.com/2011/06/calculating-unix-file-permissions/#comments</comments>
		
		<dc:creator><![CDATA[Richard Warrender]]></dc:creator>
		<pubDate>Fri, 03 Jun 2011 00:45:23 +0000</pubDate>
				<category><![CDATA[Apps]]></category>
		<category><![CDATA[Cocoa]]></category>
		<category><![CDATA[Mac OS X]]></category>
		<category><![CDATA[Objective-C]]></category>
		<category><![CDATA[bitwise]]></category>
		<category><![CDATA[linux]]></category>
		<category><![CDATA[osx]]></category>
		<category><![CDATA[unix]]></category>
		<guid isPermaLink="false">http://richardwarrender.com/?p=340</guid>

					<description><![CDATA[A few years ago I wrote a simple but handy Mac app that calculates unix file permissions using a matrix of check boxes. I wrote it because I wanted to better understand how those octal values get calculated and to expand my experience of writing Mac apps. I was also learning some crazy assembly code [&#8230;]]]></description>
		
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			<slash:comments>3</slash:comments>
		
		
		<post-id xmlns="com-wordpress:feed-additions:1">340</post-id>	</item>
		<item>
		<title>Core Data Objects in Wrong Sections</title>
		<link>https://richardwarrender.com/2010/10/core-data-objects-in-wrong-sections/</link>
					<comments>https://richardwarrender.com/2010/10/core-data-objects-in-wrong-sections/#comments</comments>
		
		<dc:creator><![CDATA[Richard Warrender]]></dc:creator>
		<pubDate>Mon, 18 Oct 2010 17:55:49 +0000</pubDate>
				<category><![CDATA[Apps]]></category>
		<category><![CDATA[Cocoa]]></category>
		<category><![CDATA[Core Data]]></category>
		<category><![CDATA[Objective-C]]></category>
		<category><![CDATA[Programming]]></category>
		<category><![CDATA[Swift]]></category>
		<category><![CDATA[Cocoa Touch]]></category>
		<category><![CDATA[iOS 4]]></category>
		<category><![CDATA[ipad]]></category>
		<category><![CDATA[iphone]]></category>
		<category><![CDATA[key-paths]]></category>
		<category><![CDATA[programming]]></category>
		<category><![CDATA[sorting]]></category>
		<guid isPermaLink="false">http://richardwarrender.com/?p=213</guid>

					<description><![CDATA[NSFetchedResultsController is a really handy class. Use one of the default Core Data templates in Xcode and you&#8217;ll very quickly have a nice list of managed objects in a table view.&#160;With a few more lines of code you can get the NSFetchedResultsController to group your objects by sections. You do this by specifying a key-path [&#8230;]]]></description>
		
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			<slash:comments>22</slash:comments>
		
		
		<post-id xmlns="com-wordpress:feed-additions:1">213</post-id>	</item>
		<item>
		<title>Quick Spreadsheet to plist Technique</title>
		<link>https://richardwarrender.com/2010/09/spreadsheet-to-plist/</link>
					<comments>https://richardwarrender.com/2010/09/spreadsheet-to-plist/#comments</comments>
		
		<dc:creator><![CDATA[Richard Warrender]]></dc:creator>
		<pubDate>Tue, 21 Sep 2010 18:14:50 +0000</pubDate>
				<category><![CDATA[Cocoa]]></category>
		<category><![CDATA[Core Data]]></category>
		<category><![CDATA[Objective-C]]></category>
		<category><![CDATA[Programming]]></category>
		<category><![CDATA[Unix]]></category>
		<category><![CDATA[csv]]></category>
		<category><![CDATA[iphone]]></category>
		<category><![CDATA[osx]]></category>
		<category><![CDATA[php]]></category>
		<category><![CDATA[plist]]></category>
		<category><![CDATA[terminal]]></category>
		<guid isPermaLink="false">http://richardwarrender.com/?p=187</guid>

					<description><![CDATA[Imagine you have a huge list of names in a spreadsheet and you&#8217;d like to get this data into an Apple plist file to use in your iPhone/Mac app or import into a Core Data model. Such a long list of data would take forever to cut and paste so here is a really quick [&#8230;]]]></description>
		
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			<slash:comments>5</slash:comments>
		
		
		<post-id xmlns="com-wordpress:feed-additions:1">187</post-id>	</item>
		<item>
		<title>Custom fonts on iPad and iPhone</title>
		<link>https://richardwarrender.com/2010/08/custom-fonts-on-ipad-and-iphone/</link>
					<comments>https://richardwarrender.com/2010/08/custom-fonts-on-ipad-and-iphone/#comments</comments>
		
		<dc:creator><![CDATA[Richard Warrender]]></dc:creator>
		<pubDate>Wed, 18 Aug 2010 20:48:54 +0000</pubDate>
				<category><![CDATA[Cocoa]]></category>
		<category><![CDATA[Objective-C]]></category>
		<category><![CDATA[Programming]]></category>
		<category><![CDATA[Swift]]></category>
		<category><![CDATA[UIKit]]></category>
		<category><![CDATA[fonts]]></category>
		<category><![CDATA[iOS 4]]></category>
		<category><![CDATA[ipad]]></category>
		<category><![CDATA[iphone]]></category>
		<category><![CDATA[uikit]]></category>
		<guid isPermaLink="false">http://richardwarrender.com/?p=147</guid>

					<description><![CDATA[Just incase you didn&#8217;t realise, with iOS 3.2 (iPad) and above you can load in custom fonts and use them with a standard UIFont object. There are a few catches&#8230;&#160;The font must be in the following format: &#8211; OpenType Format (OTF) TrueType Format (TTF) Once you&#8217;ve dragged your chosen font file into an Xcode project, [&#8230;]]]></description>
		
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			<slash:comments>8</slash:comments>
		
		
		<post-id xmlns="com-wordpress:feed-additions:1">147</post-id>	</item>
		<item>
		<title>Re-ordering Core Data Objects on iOS4</title>
		<link>https://richardwarrender.com/2010/08/re-ordering-core-data-objects-on-ios4/</link>
					<comments>https://richardwarrender.com/2010/08/re-ordering-core-data-objects-on-ios4/#respond</comments>
		
		<dc:creator><![CDATA[Richard Warrender]]></dc:creator>
		<pubDate>Tue, 17 Aug 2010 06:59:00 +0000</pubDate>
				<category><![CDATA[Cocoa]]></category>
		<category><![CDATA[Core Data]]></category>
		<category><![CDATA[Objective-C]]></category>
		<category><![CDATA[Programming]]></category>
		<category><![CDATA[Cocoa Touch]]></category>
		<category><![CDATA[iOS 4]]></category>
		<category><![CDATA[iphone]]></category>
		<category><![CDATA[programming]]></category>
		<category><![CDATA[UI]]></category>
		<guid isPermaLink="false">http://richardwarrender.com/?p=139</guid>

					<description><![CDATA[The Core Data framework on the iPhone is incredibly powerful. It&#8217;s also incredibly efficient and part of that is because a collection of objects only have the order that you implicitly give them. For example you typically might give an Event object a timestamp and when you pull out all the events you might sort [&#8230;]]]></description>
		
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			<slash:comments>0</slash:comments>
		
		
		<post-id xmlns="com-wordpress:feed-additions:1">139</post-id>	</item>
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