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Bite-sized videos on iOS development.

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Showing episodes 97 - 120 of 504 in total
  • #408

    Making a Podcast App From Scratch

    We take our player bar and install it into a custom tab bar. To do this we have to create a custom tab bar controller and tab bar subclass and mix it with just a little bit of questionable UIKit hackery to get it to layout how we want. We'll talk about the tradeoffs for different approaches as well as see some useful debugging tips when a button isn't responding to taps.

  • #407

    Making a Podcast App From Scratch

    We have a player but there's currently no way to bring it back up after dismissing it. In this episode we'll design a persistent player bar that will control the player and will be allowed to live outside its view controller.

  • #406

    Sometimes we need to create variants of our icons. This can be done by using template images and using a UIImageView with a tintColor change, however sometimes this isn't feasible. We can use our icons along with a mask to create new images of whatever color we want. In this episode we'll use UIGraphicsImageRenderer to quickly draw a new dimmed image for a highlighted button state.

  • #405

    Making a Podcast App From Scratch

    In this episode we implement one of the core functions of a podcast player: playing audio! Using AVPlayer we load up the track and observe its progress so we can update the UI to reflect time progressed, time remaining, as well as allowing the user to scrub to a position in the track.

  • #404

    Making a Podcast App From Scratch

    We've spent a lot of time dealing with the data, networking, architecture, and overall theme of our podcast app, but we haven't yet written a player! So in this episode we start the process of designing our player screen. We'll start by adding all of the controls and views to our PlayerViewController, wire everything up, and customize the look & feel to match our Sketch design.

  • #403

    Making a Podcast App From Scratch

    In this episode we set up a Core Data model for persisting podcast subscriptions. We'll cover the various ways Xcode generates model classes for us and work on saving and loading podcast subscriptions so that the subscribe button behaves as it should.

  • #402

    Making a Podcast App From Scratch

    We have some housekeeping to do in this episode. We also want to add a little polish to the podcast detail screen so that it doesn't resemble a stock table view driven app. We also need to clean up the data model a bit in preparation for persistence, and we also want to remove the pesky html tags that show up on the podcast and episode descriptions.

  • #401

    Making a Podcast App From Scratch

    In this episode we extract episode information from the podcast feed and render them as cells on the podcast detail screen.

  • #400

    Attaching gestures works quite a bit differently in SwiftUI than in UIKit. In this episode we will look at the @DragGesture property wrapper and how we can use gestures to update custom state that we can then use to transform our UI.

  • #399

    SwiftUI's declarative nature makes building UIs incredibly easy. In this episode we will build a wallet UI with cards. We will create a CardView so we can reuse it in multiple places. Then we will use transforms to alter it's size and position. Finally we will see how declarative animations work as we expand the cards apart.

  • #398

    Making a Podcast App From Scratch

    In this episode we clean up some autolayout warnings, implement some changes to support dynamic text, then move our attention to presenting the podcast detail screen when tapping on search results. Since the data is coming from various places we introduce a Data Manager to move that responsibility out of the view controller.

  • #397

    Now that we've seen a taste of SwiftUI, let's dive into a real example and build an app. We'll have a first look at @State variables we can use to creating a binding between our state and our UI, and we'll run into a few puzzling errors and see how we can coax Xcode into giving us the right error message.

  • #396

    Back from WWDC 19 and blown away by the announcements. There's a lot to cover, but we'll start by digging into the most exciting announcement: SwiftUI. This is going to change everything...

  • #395

    You may encounter a scenario where you want to decode some JSON that contains an array of objects that may be of a different type. In this episode we examine such a scenario, where we have a feed that contains an array of posts, but each post object can be of a different kind, such as text, image, or video. We will take a look at how to solve this by introducing a protocol called DecodableClassFamily, and along with a Discriminator that will inform the decoding logic which type it should decode. We'll then take this working example and make a reusable solution using Swift Generics.

  • #394

    Making a Podcast App From Scratch

    In this episode we customize our call-to-action Subscribe button. Using @IBDesignable and Interface Builder we can preview how it looks in the various button states without having to recompile and run in the simulator every time.

  • #393

    Making a Podcast App From Scratch

    In this episode we create some more custom @IBDesignable views, this time for a padded genre label where we use the intrinsicContentSize to make a label take up more space and give itself a little padding. We also create a separator view that draws a thin line to separate sections visually.

  • #392

    Making a Podcast App From Scratch

    In this episode we create a custom UIView subclass that draws a gradient overlay. This allows us to overlap the podcast information above the artwork slightly.

  • #391

    Making a Podcast App From Scratch

    In this episode we start laying out the Podcast Detail screen. We'll start by using an embedded view controller for the header portion, which contains all of the top-level information about the podcast. We'll then see how we can utilize this child view controller to contain all of our outlets and how to pass data from the parent view controller to the child.

  • #390

    Making a Podcast App From Scratch

    To get the information we need for the Podcast Detail screen, we’ll have to get the feed URL and parse it. There’s no built-in Codable support for XML, so we’ll look at using FeedKit to parse the feeds and extract the relevant information we need.

  • #389

    Making a Podcast App From Scratch

    In this episode we build another API client to search for podcasts matching a term and customize the UI and behavior of the search bar. We display the recommended podcasts first, then when a user types in a term we show the matching podcasts from the iTunes API.

  • #388

    Making a Podcast App From Scratch

    In this episode we take the response from the top podcasts feed and decode the JSON into models using Codable.

  • #387

    Making a Podcast App From Scratch

    It's time to start talking to external APIs to get the data we want to display in the app. We start by exploring the API we want to consume with Paw, a useful macOS app. We then create a simple API client class that abstracts most of the boilerplate logic around how to handle the various URLSession outcomes.

  • #386

    Making a Podcast App From Scratch

    Working with images from the network is such a common task in iOS development. In this episode we'll cover a useful library called Kingfisher, which gives you a simple API for downloading and caching images from the network. We also look at two ways for configuring our image view, one using User-Defined Runtime Attributes and the other by using awakeFromNib in code.

  • #385

    Making a Podcast App From Scratch

    In this episode we add our tableview cell styling to match the design, using autolayout to arrange the views and using the Xcode View Debugger to find and fix a visual glitch when using dark background cells.