Objective C for a Java Programmer

Been intending to write this for some time now. Here is a short list of things to watch out for when starting with Objective C for iPhone. The list is targeted at Java programmers beginning Objective C. Its written on my work blog.

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Extra Mouse click in GIMP on OS X

Found this tip while searching for something else about GIMP. The default setup for GIMP on OS X requires a user to click on any of the app windows (toolbox, image window, ..) twice to edit it. This setting eliminates that extra click.

http://www.macosxhints.com/article.php?story=20090817083346589

In summary -

X11 -> Preferences -> Windows -> 'Check' Click through inactive Windows

Many many thanks to the anonymous poster. This will eliminate a lot of wear and tear of my fingers.

Programmatically Taking a Screenshot in iPhone

It took me some time to find the code for this. Thought I'd share it here. The following code takes a screen capture of the currently visible portions of a UITableView but its applicable to any view.

UIGraphicsBeginImageContext(self.tableView.bounds.size);
[self.tableView.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *viewImage = UIGraphicsGetImageFromCurrentImageContext();
//UIImageWriteToSavedPhotosAlbum(viewImage, nil, nil, nil);
UIGraphicsEndImageContext();

The commented out line saves the photo to a the Photos application on the iPhone.