Here it is an other big problem while porting applications from C language to objective C for the iPhone.

NSString *myString = @"12.34";

float stringFloat = [myString floatValue];


Alike you can convert NSString to double

NSString *myString = @"12.34";

 

double stringFloat = [myString doubleValue];

 

And viceversa you can use:

float myFloat = 0.1234;

NSString *myString = [NSString stringWithFormat:@"%f", myFloat];

gg1