how create split window animation like reeder(macOS) app? - macos

Reeder app in macOS has great interactive.
But how create split window animation like reeder(macOS) app?
Reeder macOS client screenshot:
thank you for your answer. i really appreciate that.

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How can you modify the styling of a compiled macOS app without the Xcode project and without additional apps?

Does anybody know, how to change the appearance of the title bar and/or toolbar of a simple & small one-window cocoa macOS application without accessing the Xcode or installing third party applications? It's for a screen recording video project, I want to do.
I know, that there are possibilities within the applications info.plist (for example changing the app title inside the top macOS Menu Bar) but I would like to be able to change the apps window title itself and/or colors and/or fonts inside the window title bar or toolbar if possible.
Opening the app in another container window or via terminal or Applescript and adding custom parameters or even an overlay in the right position to change the styling would be okay if this is possible?
Can somebody point me in the right direction?
Thank you very much!
in short: Nibs
Nib File Viewer works until Xcode 10
saving, recompiling if possible
good luck

Develop an iPhoto-like cocoa app for mac OSX

I plan to develop a mac OSX app that has a UI similar to that of iPhoto - a panel on the left and a grid view of images on the right. I am thinking of using NSSplitView to create two panels and using NSCollectionView for the grid.
I guess this must be a pretty popular and common UI pattern for mac apps. I am new to cocoa development. Can anyone with previous experience point me to any related cocoa code samples and design document?
Thanks a lot in advance.
N.B.
This missing piece here is an NSOutlineView in source list mode, put that in your left pane. But otherwise seems like a good place to start.
You might also be interested to see what the developer of Sonora approached this problem; although this is a music app the layout is almost the same.

How to create a cocoa app windows like tweetie

I'm new to cocoa app dev, and I'm searching a solution to create a windows like the tweetie main windows with a left tool bar and a panel that point to the selected icon.
like this screenshot : http://i.stack.imgur.com/qvxWu.jpg
could anyone help me?
It's likely that a lot of the Tweetie UI is implemented using custom controls. You'll want to look into subclassing NSView and how to handle drawing and mouse events. There's nothing built into the Cocoa framework for this.
The NSView documentation has info on view programming, drawing, and event handling. If you're new to Cocoa, you may want to start off with something built in, though, as this will be a lot of work (and requires a pretty good understanding of how the framework works).

Anyone know what program the Apple store demos likely use to make their interactive desktop

I have a project that I am attempting to do and we want something similar to what the Apple store does. We thought it was a Quartz Composer interactive desktop but I've been putting together an xcode cocoa solution to do it too.
Here is an image of what I'm wondering about it is just a Title and 3 images that link out to url locations. If anyone can point me in the direction they believe can make something like this I would appreciate it.
I have used Quartz Desktop to display a .qtz but it isn't interactive. If anyone knows of another quartz desktop displaying .app that does use the interactive parts such as mouse and keyboard, it would be appreciated.
Applestore demo http://img707.imageshack.us/img707/614/dsc03934y.jpg
It's a custom proprietary program called, if I remember correctly, Concierge. But it's not doing anything tricky. You can make any NSWindow appear on the desktop by setting its window level to kCGDesktopWindowLevel.

Scrollable Content areas on Mobile Safari

I'm developing a web app for iOS devices, and want to have a header that stays on the top, and then two scrollable content areas underneath it, kind of like Gmail's iPad interface and the iPad split-view apps. Does anyone know how? I've looked at http://doctyper.com/archives/200808/fixed-positioning-on-mobile-safari/, which has a good solution to the fixed positioning, but only allows one scrollable content area. Does anyone know how to do this? Thanks in advance!
Never mind, just found Sencha Touch, which lets me do this and much, much more!
Use div scrolling. See Glovebox for example. Try this demo on the iPad.

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