Скачать или смотреть Creating a Modal Sheet Window in macOS Using Objective-C

Learn how to create a modal sheet window exclusively through programming in macOS using Objective-C. Explore a step-by-step guide and example code.
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This video is based on the question https://stackoverflow.com/q/68395701/ asked by the user 'Gabi Fintescu' ( https://stackoverflow.com/u/13959786/ ) and on the answer https://stackoverflow.com/a/68403749/ provided by the user 'apodidae' ( https://stackoverflow.com/u/12862111/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Creating a Modal Sheet Window Exclusively by Programming in macOS

When starting with macOS application development, many developers find themselves grappling with how to create a modal sheet window without relying on Interface Builder. While graphical tools can be useful, understanding how to accomplish this through code lays a solid foundation for deeper programming knowledge. In this post, we'll guide you through creating a modal sheet in macOS using Objective-C.

Understanding Modal Sheets

A modal sheet is a type of window that appears on top of your main window, temporarily blocking interaction with the rest of the application until the user has dealt with the sheet. This can be helpful for gathering input or confirming actions.

The Problem

You might attempt to create a modal sheet in your macOS application, only to find that you encounter errors, such as the "unrecognized selector" issue. This typically results from not properly setting up the necessary components, such as the sheet itself or the target/action settings on buttons. In the example provided initially, a programmer faced such issues when implementing a modal sheet without the sheet being correctly initialized.

The Solution

Let’s break down the solution into simple, actionable steps to create a modal sheet window in Objective-C for your macOS application.

Step 1: Create the Main Window

First, we need to create the main application window where our modal sheet will be called from. The following code snippet initializes the main window and a button that will trigger the modal sheet:

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Step 2: Create the Modal Sheet

To create the modal sheet, we'll use an NSPanel. This sheet will also include a button to dismiss it:

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Step 3: Show the Modal Sheet

Next, we add the functionality to show the sheet when the button is clicked:

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Step 4: Hide the Sheet

Finally, implement a method to dismiss the sheet:

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Complete Example

Here’s the complete implementation that integrates all these elements together:

[[See Video to Reveal this Text or Code Snippet]]

Conclusion

Creating a modal sheet in macOS using Objective-C, exclusively through programming, may initially seem daunting. By breaking down the process into manageable steps, you can understand each component's role and how they interact. This approach not only reinforces programming skills but also enhances your ability to create robust macOS applications.

Take these concepts and experiment with your own implementations. Happy coding!