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Editorial Team
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Asked: 2026-06-15T23:22:03+00:00

Pre-ARC, this was how you set values to your properties to avoid memory leaks:

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Pre-ARC, this was how you set values to your properties to avoid memory leaks:

NSDictionary *tempDict = [[NSDictionary alloc]init];
self.dictionary = tempDict;
[tempDict release];

But now with arc, do we still need to use the 2 line style, or can we just use a single line setter?

self.dictionary = [[NSDictionary alloc]init];

versus

NSDictionary *tempDict = [[NSDictionary alloc]init];
self.dictionary = tempDict;

Also, in general iOS dev, is it safe to just use properties most of the time, no more using the instance variables directly?

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1 Answer

  1. Editorial Team

    You can use the single-line style.

    Perhaps I don’t know what you mean by “safe”. Under ARC you can be sure that objects will be properly retained and released whether you use properties, instance variables, or a mixture.

    Without ARC, it’s usually safer (as in, less prone to human error) to always use property setters to ensure that objects are correctly retained and released.

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