Convert NSNumber to int in Objective-C

Question

I use  NSNumber numberWithInt 42  or   42  to convert an int to NSNumber before adding it to an NSDictionary   int intValue   42  NSNumber  numberValue    NSNumber numberWithInt intValue   NSDictionary  dict        integer    numberValue      When I retrieve the value from the NSDictionary  how can I transform it from NSNumber back to int   NSNumber  number   dict   integer    int  intNumber             It throws an exception saying casting is required when I do it this way   int number    int dict   integer

User · Accepted Answer

Have a look at the documentation  Use the intValue method   NSNumber  number    dict objectForKey   integer    int intValue    number intValue

User · Answer

You should stick to the NSInteger data types when possible  So you d create the number like that   NSInteger myValue   1  NSNumber  number    NSNumber numberWithInteger  myValue     Decoding works with the integerValue method then   NSInteger value    number integerValue

User · Answer

A less verbose approach   int number    dict   integer   intValue

User · Answer

Use the NSNumber method intValue  Here is Apple reference documentation

User · Answer

A tested one-liner   int number     NSNumber   dict objectForKey   integer    intValue

[objective-c] Convert NSNumber to int in Objective-C

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