How to do collapse and expand view in mac application?

Question

I am new to mac application development, here i want to do expand and collapse view in my custom view(NSView)

here the sample image

How can i achieve these kind of collapse and expand cell in NSViewController not in NSWindow...

Is it possible using NSTableView?

I know its a simple question but i facing problem.

Please suggest me some sample code or links..

Thanks

Answer 1

Collapsing / expanding can be implemented by adjusting auto layout constraints in the action method of the disclosure triangle button.

@property (nonatomic, weak) IBOutlet NSLayoutConstraint *moreInfoBoxHeight;

[[self.moreInfoBoxHeight animator] setConstant:75];

Apple has sample code using NSStackView at https://developer.apple.com/library/mac/samplecode/InfoBarStackView/Introduction/Intro.html

Answer 2

The view at the picture given is NSOutlineView. It is the NSTableView subclass.

Look at the Apple reference page and Outline programming topics.