QuickTime Player Version can record movies. If the recording process in interrupted by battery running out, or the computer being closed and put to sleep, the video file is store at the following location: ~/Library/Containers/com.apple.QuickTimePlayerX/Data

QuickTime Player Version: 10.4

[UIImage imageNamed:@"image.jpg"]

caches image for lifetime of app.

[UIImage imageWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"image" ofType:@"png"]]

no caching, always loaded from memory.

after caching, faster display problem, running out of memory