I don't understand the differences between these ways of accessing NSDictionary values
[my_dict objectForKey:@"field"]
[my_dict valueForKey:@"field"]
my_dict[@"field"]
Can someone tell me ?
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Popeye
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Pierre de LESPINAY
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1http://stackoverflow.com/questions/1062183/objective-c-whats-the-difference-between-objectforkey-and-valueforkey – codingNinja Jan 16 '13 at 16:22
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2My primary interrogation was more about the `my_dict[@"field"]` shortcut. – Pierre de LESPINAY Jan 16 '13 at 16:33
1 Answers
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[my_dict objectForKey:@"field"] is an NSDictionary method. It accepts any type of object.
[my_dict valueForKey:@"field"] is KVC method. It accepts only NSString.
my_dict[@"field"] is same as objectForKey:. This is new feature added.
Anoop Vaidya
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Just seen this. Take a look at https://clang.llvm.org/docs/ObjectiveCLiterals.html#dictionary-style-subscripting for a full discussion on the subject of literals and subscripting. – Armand Jan 09 '18 at 07:03