货币问题

Question

我有一个UITextField，用户将输入金额。我想设置它，以便向用户显示当前货币。

这是我的项目的链接。它给了我奇怪的结果：jumpShare

Answer 1

实际上，您已尝试在开始时设置小数部分，因此它可以赚到 1.00 美元这样的金额。所以你不能在UITextField 中添加更多数字。所以删除了那个东西。添加更多修改，如下所示。

- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string
{

    if (![string isEqualToString:@""]) {

        dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(0.2 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{



            NSNumberFormatter *currencyFormatter = [[NSNumberFormatter alloc] init];
            [currencyFormatter setLocale:[NSLocale currentLocale]];
            [currencyFormatter setMaximumFractionDigits:0];
            [currencyFormatter setAlwaysShowsDecimalSeparator:NO];
            [currencyFormatter setNumberStyle:NSNumberFormatterCurrencyStyle];

            textField.text = [textField.text stringByReplacingOccurrencesOfString:currencyFormatter.currencySymbol withString:@""];

            NSCharacterSet *nonNumbersSet = [[NSCharacterSet characterSetWithCharactersInString:@"0123456789"] invertedSet];

            textField.text = [textField.text stringByTrimmingCharactersInSet:nonNumbersSet];


            NSNumber *someAmount = [NSNumber numberWithUnsignedInteger:[[textField.text stringByReplacingOccurrencesOfString:@"," withString:@""] longLongValue]];
            NSString *t = [currencyFormatter stringFromNumber:someAmount];
            self.textField.text = t;



        });
    }

    return YES;
}

- (BOOL)textFieldShouldBeginEditing:(UITextField *)textField
{

    return YES;
}

替换这两种方法，可以解决你的问题。