I am using following NSNumberFormatter to add commas and symbol in the currency value.
self.currencyFormatter = [NSNumberFormatter new];
self.currencyFormatter.numberStyle = NSNumberFormatterCurrencyStyle;
self.currencyFormatter.currencySymbol = #"£";
self.currencyFormatter.currencyCode = #"GBP";
self.currencyFormatter.roundingMode = NSNumberFormatterRoundHalfUp;
self.currencyFormatter.maximumFractionDigits = 0;
Usage:
self.principleAmountTextField.text = [self.currencyFormatter stringFromNumber:[NSNumber numberWithInteger:100000]];
This displays £100,000 as expected. Now if I insert two more digits (text becomes £100,00096) in textfield and try to convert string to Integer I get 0! Basically following line returns 0. I have no idea how to deal with this issue.
NSLog(#"%d", [[self.currencyFormatter numberFromString:#"£100,00096"] integerValue]);
FYI I have custom inputview to textfield which just allows numbers to enter into textfield. In Did Edit End even I format number and display with comma.
You need to remove the commas for this to work, you can still show them in your text field but you should strip them out before you pass the string to the formatter. Something like this:
NSString *userInput = #"£100,00096";
userInput = [userInput stringByReplacingOccurrencesOfString:#"," withString:#""];
NSLog(#"%ld", (long)[[currencyFormatter numberFromString:userInput] integerValue]);
100,00096 isn't correct...
Do you mean one of these?
[[self.currencyFormatter numberFromString:#"£10000096"] integerValue]
[[self.currencyFormatter numberFromString:#"£100,000.96"] integerValue]
[[self.currencyFormatter numberFromString:#"£100000.96"] integerValue]
[[self.currencyFormatter numberFromString:#"£10,000,096"] integerValue]
My final code for the reference. The number with currency symbol also an invalid! Following takes care of everything.
NSCharacterSet *doNotWant = [NSCharacterSet characterSetWithCharactersInString:[NSString stringWithFormat:#"%#%#", self.currencyFormatter.groupingSeparator, self.currencyFormatter.currencySymbol]];
self.amountTextField.text = [[self.amountTextField.text componentsSeparatedByCharactersInSet:doNotWant] componentsJoinedByString:#""];
self.amountTextField.text = [NSString stringWithFormat:#"£%#", self.amountTextField.text];
NSUInteger amount = [[self.currencyFormatter numberFromString:self.amountTextField.text] integerValue];
self.amountTextField.text = [self.currencyFormatter stringFromNumber:[NSNumber numberWithInteger:amount]]
Related
This question already has answers here:
How to remove non numeric characters from phone number in objective-c?
(5 answers)
Closed 6 years ago.
I can't remove white space from Phone Number in iOS app.
Here is my codes.
ABMultiValueRef multiPhones = ABRecordCopyValue(person, kABPersonPhoneProperty);
for (CFIndex iPhone = 0; iPhone < ABMultiValueGetCount(multiPhones); iPhone++)
{
CFStringRef phoneNumberRef = ABMultiValueCopyValueAtIndex(multiPhones, iPhone);
NSString *phoneNumber = (__bridge NSString *) phoneNumberRef;
if (phoneNumber == nil) {
phoneNumber = #"";
}
if (phoneNumber.length == 0) continue;
// phone number = (217) 934-3234
phoneNumber = [phoneNumber stringByReplacingOccurrencesOfString:#"(" withString:#""];
phoneNumber = [phoneNumber stringByReplacingOccurrencesOfString:#")" withString:#""];
phoneNumber = [phoneNumber stringByReplacingOccurrencesOfString:#"-" withString:#""];
phoneNumber = [phoneNumber stringByReplacingOccurrencesOfString:#" " withString:#""];
// phone number = 217 9343234
[phoneNumbers addObject:phoneNumber];
}
I expect to get without white space. But it is not removed from the phone number.
How can I fix? Please help me. Thanks
You can do something a lot simpler than what you're currently doing with NSCharacterSet. Here's how:
NSCharacterSet defines a collection of characters. There are a few standard ones, such as decimalDigitsCharacterSet and alphaNumericCharacterSet.
There's also a neat method called invertedSet which returns a character set with all of the characters not included in the current one. Now, we need just one more bit of information.
NSString has a method called componentsSeparatedByCharactersInSet:, which gives you back an NSArray of the parts of the string, broken up around the characters in the characterSet you supply.
NSArray has a complementary function, componentsJoinedWithString: which you can use to turn the elements of an array (back) into a string. See where this is going?
First, define a character set that we want to include in our final output:
NSCharacterSet *digits = [NSCharacterSet decimalDigitCharacterSet];
Now, get everything else.
NSCharacterSet *illegalCharacters = [digits invertedSet]
Once we have the character set that we want, we can break out the string and reconstruct it:
NSArray *components = [phoneNumber componentsSeperatedByCharactersInSet:illegalCharacters];
NSString *output = [components componentsJoinedByString:#""];
That should give you the correct output. Four lines, and you're done:
NSCharacterSet *digits = [NSCharacterSet decimalDigitCharacterSet];
NSCharacterSet *illegalCharacters = [digits invertedSet];
NSArray *components = [phoneNumber componentsSeparatedByCharactersInSet:illegalCharacters];
NSString *output = [components componentsJoinedByString:#""];
You can use the whitespaceCharacterSet do do something similar to trim whitespace off of strings.
NSHipster has a great article about this, too.
EDIT:
If you want to include other symbols, such as the + prefix or parenthesis, you can create custom character sets with characterSetWithCharactersInString:. If you have two character sets, such as the decimal digits and the custom one you created, you could use NSMutableCharacterSet to modify the character set you have to include other characters.
I have float like 3500,435232123. All I want to know if exists (in Objective C) a function that let me keep just the last 4 digits in my case is 2123.
You can use NSNumberFormatter
NSNumberFormatter *format = [[NSNumberFormatter alloc]init];
[format setNumberStyle:NSNumberFormatterDecimalStyle];
[format setRoundingMode:NSNumberFormatterRoundHalfUp];
[format setMaximumFractionDigits:4];
[format setMinimumFractionDigits:4];
string = [NSString stringWithFormat:#"%#",[format stringFromNumber:[NSNumber numberWithFloat:65.50055]] ;
Or simply
NSString *string = [NSString stringWithFormat:#"%.04f", floatValue];
If you want only last four digits, convert the float to a string
NSString *string = [NSString stringWithFormat:#"%f", floatValue];
and get the last four characters
NSString *lastFour = [string substringFromIndex: [string length] - 4];
It you want to get the decimal part, you can do x - floor(x). For instance:
float x = 3500,435232123;
NSString *string = [NSString stringWithFormat:#"%.04f", x - floor(x)];
And to get 4 decimal digits do what Fawad Masud says.
No there is no such function, as far as i know. But here is a way to achieve exactly what you want.
First you have to round it to four digits after point:
NSString *exampleString = [NSString stringWithFormat:#"%.04f", valueToRound];
Then you get the location for the comma inside the exampleString:
NSRange commaRange = [valueString rangeOfString:#","];
Finally you create the finalString with the values from that NSRange. The substring starts at commaRange.location+commaRange.lengthbecause thats the index directly after the comma.
NSString *finalString = [valueString substringWithRange:NSMakeRange(commaRange.location+commaRange.length,valueString.length-commaRange.location-commaRange.length)];
Hope that helps you.
I think is no predefined function for that.
and the solution i thought of is:
float floatNum = 3500.435232123;
converting float number to string and trim/substring the string, like for example:
NSString *stringFloat = [NSString stringWithFormat:#"%f", floatNum];
NSString *newString = [stringFloat substringWithRange:NSMakeRange(stringFloat.length - 4, stringFloat.length)];
NSLog(#"%#", newString);
another is something like:
NSString *stringFloat = [NSString stringWithFormat:#"%f", floatNum];
//separates the floating number to
arr[0] = whole number
arr[1] = decimals
NSArray *arr=[str componentsSeparatedByString:#"."];
since you just want to work on the decimal, i think arr[1] is what you need..
NSString *stringDecimals = (NSString *)arr[1];
if ( stringDecimals.length > 4) //check the length of the decimals then cut if exceeds 4 character..
{
stringDecimals = [stringDecimals substringWithRange:NSMakeRange(stringDecimals.length - 4, stringDecimals.length)];
}
NSLog(#"stringDecimals: %#", stringDecimals);
Say I have an NSString, it represents a price that otherwise would be a double of course. I am trying to make it truncate the string at the hundredths place so it is something like 19.99 instead of 19.99412092414 for example. Is there a way, once detecting the decimal like so...
if ([price rangeOfString:#"."].location != NSNotFound)
{
// Decimal point exists, truncate string at the hundredths.
}
for me to cut off the string 2 characters after that ".", without separating it into an array then doing a max size truncate on the decimal before finally reassembling them?
Thank you very much in advance! :)
This is string manipulation, not math, so the resulting value won't be rounded:
NSRange range = [price rangeOfString:#"."];
if (range.location != NSNotFound) {
NSInteger index = MIN(range.location+2, price.length-1);
NSString *truncated = [price substringToIndex:index];
}
This is mostly string manipulation, tricking NSString into doing that math for us:
NSString *roundedPrice = [NSString stringWithFormat:#"%.02f", [price floatValue]];
Or you might consider keeping all numeric values as numbers, thinking of strings as just a way to present them to the user. For that, use NSNumberFormatter:
NSNumber *priceObject = // keep these sorts values as objects
NSNumberFormatter *numberFormatter = [[NSNumberFormatter alloc] init];
[numberFormatter setNumberStyle: NSNumberFormatterCurrencyStyle];
NSString *presentMeToUser = [numberFormatter stringFromNumber:priceObject];
// you could also keep price as a float, "boxing" it at the end with:
// [NSNumber numberWithFloat:price];
I have a UILabel that shows the outside temperature, the problem is, sometimes it shows it as a XX.XXº format instead of the normal XXº or XXXº format used to show temperature, is there anyway to force the label to only show the temperature without the decimals or at least force it to only be able to use 2 characters?
You can use this to eliminate the decimals:
NSString* numberString = [NSString stringWithFormat:#"%.0f", d]; // 0 means no decimals
Otherwise I believe this will work to limit the number of chars to 2:
NSNumberFormatter *formatter = [[NSNumberFormatter alloc] init];
formatter.usesSignificantDigits = YES;
formatter.maximumSignificantDigits = 2;
I have not really used NSNumberFormatter very much though.
NSString *temp = [galleryEntryTree objectForKey:#"description"];
if ([temp length] > 500) {
NSRange range = [temp rangeOfComposedCharacterSequencesForRange:(NSRange){0, 500}];
temp = [temp substringWithRange:range];
temp = [temp stringByAppendingString:#" …"];
}
coverView.label2.text = temp;
You may also use substring method
NSString *newformat = [NSString stringWithFormat:#"%#",[temperature substringWithRange:NSMakeRange(0,2)]];
In this case temperature is a string that you set for your label and you are only retrieving the 1st 2 digits only
A user enters a numerical string in a UILabel and the text is displayed as the user types.
NSString *input = [[sender titleLabel] text];
[display_ setText:[[display_ text] stringByAppendingString:input]];
This works fine and I format the display using NSNumberFormatter so that if 1000000 is entered it is converted to 1,000,000 upon tapping another button.
However, I'd like to get those grouping commas to be displayed as the user types. I can understand how to insert things into strings, but how to do it as the user types is not clear to me. Would this require a mutable string?
Maybe somehow monitor the string length and split it into groups of three and make and display a new string with the commas inserted? I could probably do that, but it is the "as it is typed" part that has me stymied.
Another thought is to append and display the string, then read the display into a new NSString and format it and display it again right away. So I tried that, and it almost works:
if (userIsEntering)
{
NSNumberFormatter *fmtr = [[NSNumberFormatter alloc] init];
[fmtr setNumberStyle:NSNumberFormatterDecimalStyle];
[fmtr setGroupingSeparator:#","];
[fmtr setDecimalSeparator:#"."];
NSString *out = [[display_ text] stringByAppendingString:digit];
NSNumber *num = [fmtr numberFromString:out];
NSString* formattedResult = [fmtr stringFromNumber:num];
[display_ setText: [NSString stringWithFormat:#"%#", formattedResult]];
[fmtr release];
}
And, along with the fact that the formatter is created and released with every digit entered, after 4 digits it returns null.
UPDATE: I figured out how to do it in a label (with some help from #Michael-Frederick). It uses an NSNotification.
This works perfectly for non-decimal numbers, but when I try to enter a decimal point it is ignored and removed. If I do not invoke this method, the decimal point is accepted and all works well.
Numeric entry is as follows (from a button):
NSString *digit = [[sender titleLabel] text];
if (userIsStillWorking_)
{
[display_ setText:[[display_ text] stringByAppendingString:digit]];
}
else
{
[display_ setText: digit];
userIsStillWorking_ = YES;
}
[[NSNotificationCenter defaultCenter] postNotificationName:#"updateDisplay" object:nil];
And the updateDisplay method called by the notification is:
{
NSString *unformattedValue = [display_.text stringByReplacingOccurrencesOfString:
#"," withString:#""];
unformattedValue = [unformattedValue stringByReplacingOccurrencesOfString:
#"." withString:#""];
NSDecimalNumber *amount = [NSDecimalNumber decimalNumberWithString:unformattedValue];
NSNumberFormatter *formatter = [[NSNumberFormatter alloc] init];
[formatter setGroupingSeparator:#","];
[formatter setDecimalSeparator:#"."];
[display_ setText: [ formatter stringFromNumber:amount]];
[formatter release];
}
I've tried commenting out
unformattedValue = [unformattedValue stringByReplacingOccurrencesOfString:
#"." withString:#""];
but that makes no difference.
EDIT:
A user cannot type into a uilabel. You need to use either a uitextfield or a uitextview.
If you want to use a uitextfield, do something like this...
- (void) viewDidLoad {
[super viewDidLoad];
[textField addTarget:self action:#selector(textFieldDidChange:) forControlEvents:UIControlEventEditingChanged];
}
- (void) textFieldDidChange:(UITextField *)textField {
NSString *unformattedValue = [textField.text stringByReplacingOccurrencesOfString:#"," withString:#""];
unformattedValue = [unformattedValue stringByReplacingOccurrencesOfString:#"." withString:#""];
NSNumberFormatter *formatter = [[NSNumberFormatter alloc] init];
[formatter setNumberStyle:NSNumberFormatterDecimalStyle];
[formatter setGroupingSeparator:#","];
[formatter setDecimalSeparator:#"."];
NSNumber *amount = [NSNumber numberWithInteger:[unformattedValue intValue]];
textField.text = [formatter stringFromNumber:amount];
[formatter release];
}
Note that you are correct that NSNumberFormatter should be declared outside of the textFieldDidChange method. Note that this code would actually be for an integer. You could have to switch intValue to floatValue if need be. This code is untested, it is more of a general guide.
The best way to do this is to use 2 UIlabels. 1 of the labels is used to feed your NSNumberFormatter object by using [NSString stringByAppendingString:digit]; The other label is actually displayed. The trick is to set the label that is unformatted to hidden and the other label is set as an output for the number formatter. By feeding the hidden label to the number formatter, and outputting the displayed label from the number formatter, the number formatter should be set to the NSDecimalNumber style. Setting it all up this way, the result displayed is automatic commas while typing.