How to present a new custom NSView (modally?)

Question

I'm working on my first Cocoa app being an iOS Developer. So far I found most of the information I needed online but I'm having trouble to figure out how to show a new custom NSView / NSWindow (not sure which) as show below:

A push in the right direction is more than welcome..

Answer 1

You can use NSPanel with custom view and call

NSPanel *panel=[[NSPanel alloc]initWithContentRect:NSMakeRect(0, 0, 800, 530) styleMask:NSClosableWindowMask backing:NSBackingStoreBuffered defer:YES];
panel.contentView=<# your custom view #>

[self.view.window beginSheet: panel completionHandler:^(NSModalResponse returnCode) {}];