Open Radar

 
Summary:

NSNumberFormatter's method 

- (NSNumber *)numberFromString:(NSString *)string

Given a string which contains a decimal number, such as "1.0" returns NSNumber object with wrong value. 

Steps to Reproduce:

1. Create a new NSNumberFormatter object instance using alloc-init
2. Call the newly created object instance's numberFromString: method and provide it with an NSString argument which has a decimal number, for instance "1.0"
3. Log the result of newly created NSNumber's intValue method into the console: NSLog(@"%d", [number intValue]);

Expected Results:

Console logs the number representation of given string, in this case, the console output should be "1"

Actual Results:

The console output is "0"

Notes:

I tested this on iOS 4.3 and 5.1 devices and the results are the same. But when I tested it on iOS Simulator with iOS 5.1, the result was correct which is somewhat confusing. There's a sample piece of code in attachment which reproduces the bug on the device. Right now, the only workaround this is to use NSScanner.

09-May-2012 09:52 PM Michal Tuszynski:
'number_formatter.m' was successfully uploaded

//Contents of number_formatter.m:
NSString *sampleString = @"1.0";
NSNumberFormatter *formatter = [[NSNumberFormatter alloc] init];
NSNumber *number = [formatter numberFromString:sampleString];
    
//The output in console should be 1, but is 0
NSLog(@"%d", [number intValue]);