NSString - max 1 decimal of a float

I would like to use a float in a NSString. I used the stringWithFormat and a %f to integrate my float into the NSString. The problem is that I 开发者_开发知识库would like to display only one decimal (%.1f) but when there is no decimals I don't want to display a '.0' .

How can I do that?

Thanks

I found the answer with NSNumberFormatter and setMaximumFractionDigits, then:

[numberFormatter stringFromNumber:myNumber]

Thanks to everyone especially @falconcreek

You should use NSNumberFormatter.

NSNumberFormatter *numberFormatter = [[NSNumberFormatter alloc] init];
[numberFormatter setFormat:@"#,##0.#"];
NSNumber *oneThousand = [NSNumber numberWithFloat:1000.0];
NSNumber *fivePointSevenFive = [NSNumber numberWithFloat:5.75];

NSLog(@"1000.0 formatted: %@", [numberFormatter stringFromNumber:oneThousand]);
NSLog(@"5.75 formatted: %@", [numberForatter stringFromNumber:fivePointSevenFive]);

There is a link in Apple's Data Formatting Programming Guide to the formatting standards. Handy Reference Number Format Patterns

you could use %g like this

NSLog([NSString stringWithFormat: @"test: %g", (float)1.2]);
NSLog([NSString stringWithFormat: @"test: %g", (float)1])

NSNumberFormatter has changed a little bit recently. Here is an example of getting two significant digits rounding:

NSNumberFormatter *numberFormatter = [[NSNumberFormatter alloc] init];
[numberFormatter setNumberStyle:NSNumberFormatterNoStyle];
[numberFormatter setUsesSignificantDigits:YES];
[numberFormatter setMaximumSignificantDigits:2];

And here's a link to a good, recent resource.