macOS How to Center window

[satyam90]

Using Cocoa with Obj C and XCode 2.4.1
I created preferences window for my application. Its working fine. But I want to centre it every time it is displayed. I tried to position it at centre point thru show inspector of Interface builder. Still I couldn't. Need some help to centre the window.

Satya.

 

[HiRez]

Using Cocoa with Obj C and XCode 2.4.1
I created preferences window for my application. Its working fine. But I want to centre it every time it is displayed. I tried to position it at centre point thru show inspector of Interface builder. Still I couldn't. Need some help to centre the window.

Call [myWindow center] on it when it's displayed. If you aren't the one controlling when it gets shown (by invoking a call on it directly that makes it visible), put the call inside a delegate method, such as perhaps windowDidBecomeMain: or windowDidExpose:

 

[elppa]

In another language, what I'd do is this:

[1] Take the width and the height of the users screen.
[2] Divide both by 2 to get a midpoint.
[3] Get the width and height of the window and half it.
[4] Offset it by the values collected in step 3 from the midpoint.

Sounds like Apple have a nifty shortcut though from the above poster.

 

[gnasher729]

In another language, what I'd do is this:

[1] Take the width and the height of the users screen.
[2] Divide both by 2 to get a midpoint.
[3] Get the width and height of the window and half it.
[4] Offset it by the values collected in step 3 from the midpoint.

And then test it on a system with two monitors.

 

[satyam90]

Call [myWindow center] on it when it's displayed.

I have a sharedinstance method which will return the instance of window and i am using
[[myWindow sharedInstance] center]
Still it is not working.

 

[kainjow]

I have a sharedinstance method which will return the instance of window and i am using
[[myWindow sharedInstance] center]
Still it is not working.

Make sure you're calling it after it's been initialized and awakeFromNib is called.