December 2018
Intermediate to advanced
414 pages
10h 19m
English
Content preview from Hands-On Design Patterns with Swift
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Copying
Copying an object doesn't increase its reference count, and ownership can be safely passed from one object to the other. The object's copy will have a reference count of one just after the copying process, no matter what the original object's reference count was.
The text property of UILabel is marked as copy, so any NSString * passed as the text property can be safely deallocated. If the text property of UILabel was assign, the string would need to be retained by an external object. If it was retain, this would probably unnecessarily extend object lifetimes.
In Swift, String is a struct that benefits the value type memory behaviors, and it is always copied. It is still possible to disable ARC with Objective-C 2.0, so let's use this ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.