Limit a double to two decimal places without trailing zeros

Question

I read this and that. I want this exactly:

1.4324 => "1.43"
9.4000 => "9.4"
43.000 => "43"

9.4 => "9.40" (wrong)
43.000 => "43.00" (wrong)

In both questions the answers points to NSNumberFormatter. So it should be easy to achieve, but not for me.

- (void)viewDidLoad {     [super viewDidLoad];     UILabel *myLabel = [[UILabel alloc] initWithFrame:CGRectMake(50, 100, 200, 20)];      NSNumberFormatter *doubleValueWithMaxTwoDecimalPlaces = [[NSNumberFormatter alloc] init];     [doubleValueWithMaxTwoDecimalPlaces setNumberStyle:NSNumberFormatterDecimalStyle];     [doubleValueWithMaxTwoDecimalPlaces setPaddingPosition:NSNumberFormatterPadAfterSuffix];     [doubleValueWithMaxTwoDecimalPlaces setFormatWidth:2];      NSNumber *myValue = [NSNumber numberWithDouble:0.01234];     //NSNumber *myValue = [NSNumber numberWithDouble:0.1];      myLabel.text = [doubleValueWithMaxTwoDecimalPlaces stringFromNumber:myValue];      [self.view addSubview:myLabel];     [myLabel release];     myLabel = nil;     [doubleValueWithMaxTwoDecimalPlaces release];     doubleValueWithMaxTwoDecimalPlaces = nil; } 

I also tried it with

NSString *resultString = [NSString stringWithFormat: @"%.2lf", [myValue doubleValue]]; NSLog(@"%@", resultString); 

So how can I format double values with maximum two decimal places? If the last position contains a zero the zero should be left out.

Solution:

NSNumberFormatter *doubleValueWithMaxTwoDecimalPlaces = [[NSNumberFormatter alloc] init]; [doubleValueWithMaxTwoDecimalPlaces setNumberStyle:NSNumberFormatterDecimalStyle]; [doubleValueWithMaxTwoDecimalPlaces setMaximumFractionDigits:2]; NSNumber *myValue = [NSNumber numberWithDouble:0.01234]; NSLog(@"%@",[doubleValueWithMaxTwoDecimalPlaces stringFromNumber:myValue]]; [doubleValueWithMaxTwoDecimalPlaces release]; doubleValueWithMaxTwoDecimalPlaces = nil; 

Answer 1

Try adding the following line, when configuring your formatter:

    [doubleValueWithMaxTwoDecimalPlaces setMaximumFractionDigits:2];