Refined API Naming : Migrating to Swift 3!

Just use auto layout to add constraints to pin the left and top sides of the label. You will get source changes to be able to build your project using Swift 3 and take advantage of all the new features in Xcode 8.0. UICollectionView https://forexaggregator.com/ makes adding custom layouts and layout transitions, like those in Photos, simple to build. For example, this is what we saw when we opened up theGoodAsOldPhonesapp from ourSwift course, App Evolution with Swift.

Create Label and label Height constraint outlet. Add below code where you will asign text to label. You can make an UILabel with a dynamic height using auto layout.

There’s one search per section, so the number of sections is the count of searches. The best way to understand what it does is to start from scratch. Choose iOS ▸ Source ▸ Cocoa Touch Class template and click Next. Name the new class FlickrPhotosViewController, making it a subclass of UICollectionViewController.

Use the Attributes inspector to set the Reuse Identifier to FlickrCell. A vertical flow layout means the layout class places items from left to right across the top of the view until it reaches the view’s right edge. At which point, it moves down to the next line.

Refined API Naming in Swift 3

To a seasoned iOS or OSX developer, with a short glance they could easily tell you what that code is doing. They don’t need argument labels on CGGeometry structures because everyone knows those arguments, and their sequence off by heart. This example shows how a label’s width can automatically resize when the text content changes.

• It gives all possible way to initialise CGSize and everything else you can do with it.
• You will get source changes to be able to build your project using Swift 3 and take advantage of all the new features in Xcode 8.0.
• UICollectionView makes adding custom layouts and layout transitions, like those in Photos, simple to build.
• Then, you log the results and add them at the beginning of the searches array.

JavaScript must be enabled for the tab bar to be functional. The Swift Package Index is an open-source project entirely funded by community donations. The result comes from the multiplication of the two given CGSize structs. The result comes from the subtract of the two given CGSize struct. This method can also be used to correctly space multiple labels horizontally as in this example. I found following changes when I was migrating my code to Swift 2.2 to Swift 3.

iOS Notes For Professionals

The key to create a clickable UILabel is to enable user interaction. You can download the final project using theDownload Materials button at the top or Figma Templates UI Kits bottom of this tutorial. You populate the image view with the thumbnail. Obviously, in a production app, you would want to show the user these errors.

This method controls the spacing between each line in the layout. You want this spacing to match the padding at the left and right. UICollectionViewFlowLayout also has a delegate protocol, UICollectionViewDelegateFlowLayout.

Download the project files by clicking the Download Materials button at the top or bottom of the tutorial. Open the FlickrSearch starter project. You signed out in another tab or window. You signed in with another tab or window. After converting code to latest swift 3.0 I am shown this error. CollectionView.frame.size.width will get the width of the collectionView.

CGRectMake, CGPointMake, CGSizeMake, CGRectZero, CGPointZero is unavailable in Swift

A collection view doesn’t do much unless you implement the relevant data source and delegate methods, similar to a table view. This is a placeholder method to return a blank cell. Note that collection views require you to register a cell with a reuse identifier. A runtime error will occur if you don’t. When the user taps Search after typing in a query, you want the search to execute. You already connected the text field’s delegate outlet to your collection view controller.

You’ll almost always want to create a subclass to easily access any content subviews you add. You can subclass UICollectionViewLayout to create your own custom layouts, but Apple has graciously provided a basic flow-based layout called UICollectionViewFlowLayout. Elements lay out one after another based on their size, like a grid view. You can use this layout class out of the box or subclass it to get some interesting behavior and visual effects. When you use a table view, you have to set a data source and delegate to provide the data to display and handle events, like row selection. After adding an activity view, you use the Flickr wrapper class to search Flickr asynchronously for photos that match the given search term.

Subclassing Your UICollectionViewController

Flickr is an image-sharing service with a publicly accessible, and dead-simple, API for developers. With the API, you can search for photos, add photos, comment on photos and much more. Select the single cell in the collection view.

No thank you, not ever, ever again please. Return CGSizeMake(view.frame.width, size.height + 16) to swift3. The first result is the documentation. It gives all possible way to initialise CGSize and everything else you can do with it. Developer.apple.com/documentation/coregraphics/cgsize Always check the docs.

These are the keys to creating and maintaining a successful business that will last the test of time. I don’t know about you, but writing that really stressed me out. Creating a newFrame struct from the view’s frame, modifying it, and then resetting the frame property on the view again.

It lets you tweak the layout’s behavior to configure things like cell spacing, scroll direction and cell size. You can learn more in this Apple documentation. The delegate, UICollectionViewDelegate, gets another notification when events happen, such as when a user selects, highlights or removes a cell. Finally, you refresh the UI to show the new data. You use reloadData(), which works as it does in a table view.