Unpack string into array of objects by using format specifiers

Question

Is there any way to convert the string into an array of objects of different data types, according to multiple format specifiers?

I have tried initWithFormat:arguments: but I'm not getting the expected results. There is a similar function in Python in the struct module, unpack(fmt,String), where fmt is a format specifier string and String is the string to be converted.

I think you want `NSScanner`. Here is an example: http://stackoverflow.com/questions/594797/how-to-use-nsscanner — trojanfoe, May 06 '12 at 19:06

score 0 · Answer 1 · answered May 06 '12 at 19:01

0

Look into sscanf:

void unpackStr(NSString *string, NSString *format, ...)
{
    va_list args;
    va_start(args, format);

    vsscanf([string UTF8String], [format UTF8String], args);

    va_end(args);
}

answered May 06 '12 at 19:01

Richard J. Ross III

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Hi, the code that you have provided is not giving expected results. I have done a test to display a string _** 123495885aaaaa_ but the results are _** 2686712268671241008576002686760268671253239441727800024PYõfÀYõf°SõfpRõf Rõf�Qõf Qõf **_ – simplygauz May 08 '12 at 22:24
What format are you sending into `args`? Have you read the sscanf docs? – Richard J. Ross III May 08 '12 at 22:32
I have added printf command before va_list for format and string and one printf before va_end and the output is as Below
format: %i%i%i%i%i%i%i%i%i%5s
string: 123495885aaaaa
value:2686728 2686728 5 0 1728095392 1727081904 2686728 1728095392 1727996152 PYõfÀYõf°SõfpRõf Rõf�Qõf Qõf – simplygauz May 09 '12 at 23:00

Unpack string into array of objects by using format specifiers

1 Answers1