How do I convert a float to an int in Objective C

Question

Total newbie question but this is driving me mad   I m trying this   myInt    myFloat integerValue      but I get an error saying essentially integerValue doesn t work on floats     How do I do it

User · Accepted Answer

I m pretty sure C-style casting syntax works in Objective C  so try that  too   int myInt    int  myFloat    It might silence a compiler warning  at least

User · Answer

In support of unwind  remember that Objective-C is a superset of C  rather than a completely new language   Anything you can do in regular old ANSI C can be done in Objective-C

User · Answer

Here s a more terse approach that was introduced in 2012   myInt     myFloat  intValue

User · Answer

In support of unwind  remember that Objective-C is a superset of C  rather than a completely new language   Anything you can do in regular old ANSI C can be done in Objective-C

User · Answer

You can also use C s lroundf myFloat      An incredibly useful tip  In Xcode s editor  type your code as say  myInt   roundf someFloat     then control right-click on roundf and Jump to definition  or simply command-click    You will then clearly see the very long list of the functions available to you    It s impossible to remember them all  so just use this trick    For example  in the example at hand it s likely that lrintf is what you want   A further tip  to get documentation on those many functions  In your Terminal app  or any shell - nothing to do with Xcode  just the normal Terminal app  simply type man lrintf and it will give you full info   Hope it helps someone

User · Answer

what s wrong with   int myInt   myFloat    bear in mind this ll use the default rounding rule  which is towards zero  i e  -3 9f becomes -3

User · Answer

In support of unwind  remember that Objective-C is a superset of C  rather than a completely new language   Anything you can do in regular old ANSI C can be done in Objective-C

User · Answer

You can also use C s lroundf myFloat      An incredibly useful tip  In Xcode s editor  type your code as say  myInt   roundf someFloat     then control right-click on roundf and Jump to definition  or simply command-click    You will then clearly see the very long list of the functions available to you    It s impossible to remember them all  so just use this trick    For example  in the example at hand it s likely that lrintf is what you want   A further tip  to get documentation on those many functions  In your Terminal app  or any shell - nothing to do with Xcode  just the normal Terminal app  simply type man lrintf and it will give you full info   Hope it helps someone

User · Answer

Here s a more terse approach that was introduced in 2012   myInt     myFloat  intValue

User · Answer

In support of unwind  remember that Objective-C is a superset of C  rather than a completely new language   Anything you can do in regular old ANSI C can be done in Objective-C

User · Answer

what s wrong with   int myInt   myFloat    bear in mind this ll use the default rounding rule  which is towards zero  i e  -3 9f becomes -3

User · Answer

int myInt    int  myFloat    Worked fine for me    int myInt     NSNumber numberWithFloat myFloat  intValue     Well  that is one option  If you like the detour  I could think of some using NSString   Why easy  when there is a complicated alternative

User · Answer

what s wrong with   int myInt   myFloat    bear in mind this ll use the default rounding rule  which is towards zero  i e  -3 9f becomes -3

User · Answer

int myInt    int  myFloat    Worked fine for me    int myInt     NSNumber numberWithFloat myFloat  intValue     Well  that is one option  If you like the detour  I could think of some using NSString   Why easy  when there is a complicated alternative

User · Answer

what s wrong with   int myInt   myFloat    bear in mind this ll use the default rounding rule  which is towards zero  i e  -3 9f becomes -3

[objective-c] How do I convert a float to an int in Objective C?

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