PHOTOS CREATE A OOLLECTION MAC AND I

Photos Create A Oollection Mac And I

I love my Mac and I wanted an App that appeared it was designed for it, rather than an afterthought. The user interface is highly intuative. I found the import from Excel feature (with some upfront housekeeping) easily workable.

Getting StartedThe SlidesMagic app youвЂ™re going to build is a simple image browser. If youвЂ™re new to macOS, you should take a look at the macOS tutorials available here, and then come back to learn about collection views. Finder and Photos both do this: they let you tab through files in a gallery layout.Introduced in OS X 10.5, NSCollectionView offered a handy means of arranging a group of objects in a grid of identically-sized items displayed in a scrollable view.OS X 10.11 El Capitan gave NSCollectionView a major overhaul inspired by UICollectionView from iOS.MacOS 10.12 added two additional features to close the gap with iOS: collapsible sections (like in Finder) and sticky headers.In this NSCollectionView tutorial, youвЂ™ll build SlidesMagic вЂ” your own grid-based image browsing app.This tutorial assumes that you know the basics of writing macOS apps. Update note: This NSCollectionView tutorial has been updated to Xcode 8 and Swift 3 by Gabriel Miro.A collection view is a powerful mechanism for laying out an ordered set of data items in a visual way.

The Starter Project CodeThe starter project provides functionality that is not directly related to collection views, but is specific to SlidesMagic. You can choose another folder by selecting File/Open Another FolderвЂ¦ menu. From XcodeвЂs console log, you can see the file names.That list in the console is an indicator that the model-loading logic is in place. Build and run:At this point, it appears to be an empty window, but it has hidden features that will become the foundation of an image browser.When SlidesMagic launches, it automatically loads all the images from the systemвЂ™s Desktop Pictures folder. The finished app will look like this:Download the starter project here. :]It retrieves all image files from a folder on the file system and displays them with their names in an elegant collection view.

When grouping of items into sections isnвЂ™t required, you still have at least one section (by default).Like many other Cocoa frameworks, items in the collection view follow the MVC design pattern.The Model and the View: The itemsвЂ™ content comes from your modelвЂ™s data objects. Each item is associated with an index that comprises of a pair of integers (section, item) encapsulated in an IndexPath instance. The items form an ordered list of sections, each containing an ordered list of items.

Supplementary ViewsTo display extra information in the collection view thatвЂ™s not part of an individual item, youвЂ™d use supplementary views. When items are not of the same kind, you define a different subclass and nib for each variant. Generally, you subclass NSCollectionViewItem. It mediates the flow of information between the itemsвЂ™ views and model objects. Xib.The Controller: The nib mentioned above is owned by an instance of NSCollectionViewItem, which is a descendant of NSViewController. The structure of these individual views are defined in a separate nib with file extension.

NSCollectionViewDelegateFlowLayout: Lets you customize a flow layout.Note: You may have noticed Interface Builder added three views instead of just one. NSCollectionViewDelegate: Handles events related to drag-and-drop, selection and highlighting. NSCollectionViewDataSource: Populates the collection view with items and supplementary views. The Collection View Data Source and Delegates

Open ViewController.swift and add the following inside the ViewController class weak var collectionView: NSCollectionView!Open Main.storyboard, and select the View Controller inside the View Controller Scene.Open the Connections Inspector and find the collectionView element within the Outlets section. Then, select Editor/Resolve Auto Layout Issues/Add Missing Constraints to add the Auto Layout constraints.You need to add an outlet in ViewController to access the collection view. When youвЂ™re instructed to select the Collection View, make sure youвЂ™re not selecting the Scroll View or the Clip View.Resize the Bordered Scroll View so it takes up the entire area of the parent view.

Photos For Mac Create A Oollection