iphone - UIKeyboardTypeDecimalPad - change comma to dot -

i use method show keyboard decimal separator

mytextfield.keyboardtype=uikeyboardtypedecimalpad; 

how can change comma dot separator?

i have finnish locale. comma, decimals doesn't work on app.

-(ibaction)calculate {     float x = ([paino.text floatvalue]) / ([pituus.text floatvalue]) *10000;         label.text = [[nsstring alloc] initwithformat:@"%0.02f", x]; } 

ok edit text field using numeric keyboard, dependent on current locale, , text representation of number, dependendt on current locale, too. after editing has finished read , want transform number.

to convert use nsnumberformatter this:

nsnumberformatter *nf = [[nsnumberformatter alloc] init]; 

you can setup formatter will, setting locale (!), limits, formatting, decimal/grouping separator, number of decimal digits etc. use it:

float number = [nf numberfromstring: field.text]; 

and that's all! have number if text includes comma, provided let both: keyboard , formatter, have same format, same style - i.e. let current locale used on place.

edit

this currency formatter, can convert between string , number currencies:

nsnumberformatter *nf = [[nsnumberformatter alloc] init]; [nf setnumberstyle: nsnumberformattercurrencystyle]; [nf setroundingmode: nsnumberformatterroundhalfup]; [nf setmaximumfractiondigits: 2] 

this percentage formatter 4 decimal places:

nsnumberformatter *nf = [[nsnumberformatter alloc] init]; [nf setnumberstyle: nsnumberformatterpercentstyle]; [nf setroundingmode: nsnumberformatterroundhalfup]; [nf setmaximumfractiondigits: 4]; 

both in current locale.

as see can define style, digits, rounding behaviour , more, depending on numbers trying enter. more details (it lot can nsnumberformatter) should read apple docs, go beyond scope of answer describe all.

in case, provided paino , pituus uitextfields:

-(ibaction)calculate {     nsnumberformatter *nf = [[nsnumberformatter alloc] init];     [nf setroundingmode: nsnumberformatterroundhalfup];     [nf setmaximumfractiondigits: 2];      float npaino = [[nf numberfromstring: paino.text] floatvalue];     float npituus = [[nf numberfromstring: pituus.text] floatvalue];      float x = npaino] / npituus *10000;         label.text = [nf stringfromnumber: [nsnumber numberwithfloat: x]];      [nf release]; } 

now avoid creating formatter in each calculation make instance variable, since need 1 conversions.