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As one of the most common and regular stuff that you need to implement on every application of every platform, you should be able to select files and directories from the system easily, following official documentation of course. Unfortunately, there's not a lot of sources where you can obtain indications or examples of how to implement a file/directory picker in MacOS and the ones you find are usually outdated because they don't mention for which version of Swift are they.
In this article, i want to share with you some examples of how to use the native MacOS file/directory picker using Swift 5 that i use regularly on my applications.
A. Implementing the file picker
All the job is handled basically by the NSOpenPanel class. Instead of implementing your own file browser, the Open panel class is used as a very convenient way to allow the user to look for a file or directory in the system. The easiest way to display this dialog and handle the user selection is described on the following snippet:
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You simply need to create an instance of the
NSOpenPanel
and call the runModal
method to display it. Previously, you may need to change some default properties as the possiblity of selecting multiple files etc. The method will return a code that can be compared with the NSApplication.ModalResponse
struct, a set of button return values for modal dialogs. With a condition you should check if the user has selected a file and clicked on ok, finally you should verify that the url property of the dialog instance is not nil and you will be able to obtain the path of the file selected by the user.A.1. Filtering by file extension
In some cases, the user shouldn't be able to pick any file in the system but files with specifical formats. For example, a regular case is the fact of picture manipulation software, where the user should be able to select only pictures with extensions as png, jpg or jpeg. The following snippet should display a filepicker that allows the user to select images only (like the image of the article):
A.2. Selecting multiple files
If you want to allow the user to select multiple files at time, be sure to set the allowsMultipleSelection option of the dialog to true. Then the user should be able to select whatever and how many files he wants. Be sure as well to change the code to manipulate the result. Instead of working with the
dialog.url
property, use the dialog.urls as this contains the array with the selected files. You can do whatever you want with the results, extract the path from every item of the array with the path property as shown in the following example:B. Implementing the directory picker
For the implementation of the directory picker, we will use the same
NSOpenPanel
class but you will need to change the 2 following properties to the dialog during its initialization:This will allow the user to select only directories in the system. The rest of the logic is basically the same as with the filepicker. For example:
B.1. Select a single directory
The following snippet shows the implementation of a picker that allows the user to select a single directory only:
Xcode Macos App
B.2. Select multiple directories
The following snippet shows the implementation of a picker that allows the user to select multiple directories at the same time:
Happy coding !
With an all-new design that looks great on macOS Big Sur, Xcode 12 has customizable font sizes for the navigator, streamlined code completion, and new document tabs. Xcode 12 builds Universal apps by default to support Mac with Apple Silicon, often without changing a single line of code.
Designed for macOS Big Sur.
Xcode 12 looks great on macOS Big Sur, with a navigator sidebar that goes to the top of the window and clear new toolbar buttons. The navigator defaults to a larger font that’s easier to read, while giving you multiple size choices. New document tabs make it easy to create a working set of files within your workspace.
Document tabs.
The new tab model lets you open a new tab with a double-click, or track the selected file as you click around the navigator. You can re-arrange the document tabs to create a working set of files for your current task, and configure how content is shown within each tab. The navigator tracks the open files within your tabs using strong selection.
Navigator font sizes.
The navigator now tracks the system setting for “Sidebar icon size” used in Finder and Mail. You can also choose a unique font size just for Xcode within Preferences, including the traditional dense information presentation, and up to large fonts and icon targets. Zadobe dreamweaver cc 2017 v17.0.1.9346 multilingual for macos.
Code completion streamlined.
A new completion UI presents only the information you need, taking up less screen space as you type. And completions are presented much faster, so you can keep coding at maximum speed.
Redesigned organizer.
Which web browser is current for el capitan 10. An all-new design groups all critical information about each of your apps together in one place. Choose any app from any of your teams, then quickly navigate to inspect crash logs, energy reports, and performance metrics, such as battery consumption and launch time of your apps when used by customers.
SwiftUI
SwiftUI offers new features, improved performance, and the power to do even more, all while maintaining a stable API that makes it easy to bring your existing SwiftUI code forward into Xcode 12. A brand new life cycle management API for apps built with SwiftUI lets you write your entire app in SwiftUI and share even more code across all Apple platforms. And a new widget platform built on SwiftUI lets you build widgets that work great on iPad, iPhone, and Mac. Your SwiftUI views can now be shared with other developers, and appear as first-class controls in the Xcode library. And your existing SwiftUI code continues to work, while providing faster performance, better diagnostics, and access to new controls.
Universal app ready.
Xcode 12 is built as a Universal app that runs 100% natively on Intel-based CPUs and Apple Silicon for great performance and a snappy interface.* It also includes a unified macOS SDK that includes all the frameworks, compilers, debuggers, and other tools you need to build apps that run natively on Apple Silicon and the Intel x86_64 CPU.
Updated automatically
When you open your project in Xcode 12, your app is automatically updated to produce release builds and archives as Universal apps. When you build your app, Xcode produces one binary “slice” for Apple Silicon and one for the Intel x86_64 CPU, then wraps them together as a single app bundle to share or submit to the Mac App Store. You can test this at any time by selecting “Any Mac” as the target in the toolbar.
Test multiple architectures.
On the new Mac with Apple Silicon, you can run and debug apps running on either the native architecture or on Intel virtualization by selecting “My Mac (Rosetta)” in the toolbar.
Multiplatform template
New multiplatform app templates set up new projects to easily share code among iOS, iPadOS, and macOS using SwiftUI and the new lifecycle APIs. The project structure encourages sharing code across all platforms, while creating special custom experiences for each platform where it makes sense for your app.
Improved auto-indentation
Swift code is auto-formatted as you type to make common Swift code patterns look much better, including special support for the “guard” command.
StoreKit testing
New tools in Xcode let you create StoreKit files that describe the various subscription and in-app purchase products your app can offer, and create test scenarios to make sure everything works great for your customers — all locally testable on your Mac.
Get started with the beta.
Xcode Macos Dialog For Text String Free
Download Xcode 12 beta and use these resources to build apps for all Apple platforms.