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Bite-sized screencasts on iOS and Mac development.

Displaying Episode 217 - 240 of 400 in total
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#184
In this episode we take a look a DZNEmptyDataSet, a useful library for providing a more inviting UI when you have no content to display inside of a table view or collection view. We'll also see how to leverage NSAttributedString to provide styling of the text that is displayed on the screen.
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#183
Sam Soffes continues building a screen saver, this time showing us how to add a Preferences window to the app as well as exporting and installing it as a real screen saver in the system.
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#182
In this episode Sam Soffes walks us through creating a screen saver for OS X. In order to develop it and see the results quickly, he starts by creating a preview Mac app to show what the screen saver will look like.
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#181
In this episode we take a look at CGImageSource from the ImageIO framework. Using CGImageSource we can perform operations like resize without loading the entire image into memory. In addition, we can extract image metadata like f-stop, aperture, ISO, and camera/lens information.
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#180
In this episode, Ben continues exploring NSOperation-based architecture, this time writing operations that present UI for a login screen, load the Core Data stack, and operations that are composed of multiple lower-level operations.
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#179
Sam Soffes joins us again to talk about supporting Carthage for your own libraries. In the demo, you'll also see how to structure a project to include both Mac and iOS framework targets with a single Xcode project.
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#178
In this episode we welcome our first ever guest screencaster, Sam Soffes! Sam takes us through what it takes to get started with Carthage to manage dependencies. Sam compares Carthage's approach to CocoaPods and walks through how to bring in a 3rd party library into a project.
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#177
In this episode we discuss dependent NSOperations. Using dependencies you can queue up a bunch of jobs and they will be run in the correct order, having one provide the necessary state for the next one to run. In the example, we take the large Hubble image, scale it down to a more appropriate size, then apply a Core Image filter to it. Each operation is dependent on the one before it, yet they are all queued up at the same time.
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#176
In this episode we examine the asynchronous (a.k.a concurrent) type of NSOperation where we are doing things that involve callback blocks or delegates.
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#175
In this episode we take a look at the basics of NSOperation, NSOperationQueue, starting from block operations and moving to custom NSOperation subclasses. We'll also see why it's important to make your operations thread safe.
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#174
In this episode we cover local notifications in iOS 8. We cover the difference between count-down style notifications and time-zone based notifications. We also discuss how to add actions to the notifications and handle those in your application.
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#173
In this episode we take the Magic Move transition from last week's episode and make interactive, so that you can feel the transition along with your swipe.
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#172
In this episode we'll create a custom view controller animation that mimics the Magic Move behavior from keynote, taking one object and animating into its place on the next slide (or view controller).
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#171
In this episode we examine how we can leverage the NSDateComponents class to convert a set of individual date parts like month, day, year into an actual NSDate
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#170
In this episode we talk about a Swift testing framework called Quick. Quick offers a familiar BDD style syntax, some really friendly matchers, as well as support for testing asynchronous parts of our code. We'll use a Ninja class as our example, testing initialization, equality, and an asynchronous method.
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#169
In this episode we wrap up our long Road Trip DJ Series. We resume testing on the device, uncovering and fixing an auto-layout issue, working with the music players events to keep our UI in sync, implementing a song progress indicator and implementing scrubbing. Phew!
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#168
In this episode we fix up the scrollbar, handle taps and update the active track, as well as adding a background color to the active row.
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#167
In this episode I do some deep auto-layout constraint debugging with Reveal, and discuss how to make our header resize based on the device we're running on.
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#166
In this episode I address the usability concerns of our toolbar buttons. I removed the bar button item spacing elements and instead use auto layout to control the size of the buttons. We also add a visual indicator of how wide each button is when you tap it, and fix the play/pause state of the middle button.
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#165
In this episode we adapt MPMediaItem to our PlaylistItem protocol and fix some issues related to running on the device. We add play/pause functionality, and discuss the issue of hit area on our toolbar buttons.
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#164
In this episode I fix a couple of bugs and fix the transition animation for the header view by leveraging UIView snapshotting.
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#163
In this episode we fix the playlist header at the top, first by a custom collection view layout, then by simply using a custom view at the top.
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#162
In this episode we wire up the next / previous track buttons and modify which track is currently shown in the header. We also encounter an unexpected issue when comparing signed and unsigned integers.
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#161
In this episode we make a custom collection view header to prominently display the currently playing track. We also fix up some auto layout issues from the last episode.