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PONSDecimalNumbers in Array Causing "Unrecognized Selector..." messages
 

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  1. PONSDecimalNumbers in Array Causing "Unrecognized Selector..." messages
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    <p>Ive been playing around with obj-c for a few months now and feel comfortable with a lot of things but cant make sense of something that seems very simple. I need to be able to go from an NSString split into an array then get the NSDecimalNumbers from that array. If I try to perform any calculations, I get an "unrecognized selector sent to instance." If I simply print each decimal number everything goes smoothly. If I put the values manually into NSDecimalNumbers rather than pulling from the array that also works. The error and code are below.</p> <blockquote> <p>2013-10-14 15:54:42.174 test[30829:c07] -[__NSCFString decimalNumberByAdding:]: unrecognized selector sent to instance 0x75a81f0 2013-10-14 15:54:42.176 test[30829:c07] <strong>* Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[__NSCFString decimalNumberByAdding:]: unrecognized selector sent to instance 0x75a81f0' *</strong> First throw call stack: (0x1c90012 0x10cde7e 0x1d1b4bd 0x1c7fbbc 0x1c7f94e 0x2075 0x10e1705 0x152c0 0x15258 0xd6021 0xd657f 0xd56e8 0x44cef 0x44f02 0x22d4a 0x14698 0x1bebdf9 0x1bebad0 0x1c05bf5 0x1c05962 0x1c36bb6 0x1c35f44 0x1c35e1b 0x1bea7e3 0x1bea668 0x11ffc 0x1bfd 0x1b25) libc++abi.dylib: terminate called throwing an exception</p> </blockquote> <pre><code>-(IBAction)buttonPushed: (id) sender { NSString* s = @"25.55, 109.24"; NSArray* a = [s componentsSeparatedByString: @" "]; NSDecimalNumber* dec1 = [a objectAtIndex: 0]; NSDecimalNumber* dec2 = [a objectAtIndex: 1]; NSDecimalNumber* sum = [dec1 decimalNumberByAdding: dec2]; statusText.text = [NSString stringWithFormat: @"%@", sum, nil]; } </code></pre>
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    1. USvikingosegundo
    1. USuser2880241
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      1. VTDownMod
    1. COThe array elements are still NSStrings. You need to transmogrify the strings into NSDecimalNumbers first
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      1. PONSDecimalNumbers in Array Causing "Unrecognized Selector..." messages
      1. USWarren Burton
 

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