Iphone “如何使用方法”；小数分隔符“；来自NSNumberFormatter

在我的应用程序中，我尝试根据本地设置检查用户是否输入了右小数点分隔符（如果用户出错，该部分数据不会进入CoreData数据库）：

我获得用户输入：

NSString *firstForDistance = _forDistanceTextField.text;

尝试从字符串中提取小数分隔符：

NSString *separator = [firstForDistance decimalSeparator];

然后检查分隔符是否符合用户的本地设置或他是否输入了错别字。如果输入错误或出错，我会将其替换为本地设置中的十进制分隔符：

if (separator != [locale objectForKey:NSLocaleDecimalSeparator]) {
    firstForDistance = [firstForDistance stringByReplacingOccurrencesOfString:separator withString:[locale objectForKey: NSLocaleDecimalSeparator]];
}

代码的其余部分：

self.user.forDistance = [numberFormatter numberFromString:firstForDistance];

[self.delegate usersMakeViewController:self addUser:self.user];
}

这很好，也很容易，但提取不起作用：

NSString *separator = [firstForDistance decimalSeparator];

方法“decimalSeparator”是来自NSNumberFormatter的实例方法，我从Xcode得到错误

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如何解决此问题？

您可以像下面这样检查字符串是否有小数分隔符

NSNumberFormatter *numberFormatter = [[NSNumberFormatter alloc] init];
    [numberFormatter setNumberStyle:NSNumberFormatterDecimalStyle];
    [numberFormatter setLocale:[NSLocale currentLocale]];
    if ([textField.text rangeOfString:numberFormatter.decimalSeparator].location != NSNotFound) 
        NSLog(@"YES,  Give number has decimalSeparator");
    else
        NSLog(@"NO, dont have decimalSeparator");

---

您可以像下面这样检查字符串是否有小数分隔符

NSNumberFormatter *numberFormatter = [[NSNumberFormatter alloc] init];
    [numberFormatter setNumberStyle:NSNumberFormatterDecimalStyle];
    [numberFormatter setLocale:[NSLocale currentLocale]];
    if ([textField.text rangeOfString:numberFormatter.decimalSeparator].location != NSNotFound) 
        NSLog(@"YES,  Give number has decimalSeparator");
    else
        NSLog(@"NO, dont have decimalSeparator");

修正如下：

NSNumberFormatter *numberFormatter = [[NSNumberFormatter alloc] init];
[numberFormatter setNumberStyle:NSNumberFormatterDecimalStyle];

NSLocale *locale = [NSLocale currentLocale];
NSString *firstForDistance = _forDistanceTextField.text;

firstForDistance = [firstForDistance stringByReplacingOccurrencesOfString:@"." withString:[locale objectForKey: NSLocaleDecimalSeparator]];
firstForDistance = [firstForDistance stringByReplacingOccurrencesOfString:@"," withString:[locale objectForKey: NSLocaleDecimalSeparator]];

self.user.forDistance = [numberFormatter numberFromString:firstForDistance];
[self.delegate usersMakeViewController:self addUser:self.user];

希望这对某人有所帮助。

如下所示：

NSNumberFormatter *numberFormatter = [[NSNumberFormatter alloc] init];
[numberFormatter setNumberStyle:NSNumberFormatterDecimalStyle];

NSLocale *locale = [NSLocale currentLocale];
NSString *firstForDistance = _forDistanceTextField.text;

firstForDistance = [firstForDistance stringByReplacingOccurrencesOfString:@"." withString:[locale objectForKey: NSLocaleDecimalSeparator]];
firstForDistance = [firstForDistance stringByReplacingOccurrencesOfString:@"," withString:[locale objectForKey: NSLocaleDecimalSeparator]];

self.user.forDistance = [numberFormatter numberFromString:firstForDistance];
[self.delegate usersMakeViewController:self addUser:self.user];

---

希望这有助于某人。

谢谢你，Narayana，这也很方便，我会考虑的，但是我想替换分离器，如果用户根据他的本地设置来打字（昏迷或相反的时间）。@ USE1818438你能解释一下Malthink你@ Narayana吗？这也很方便，我会考虑，但我想更换分离器，如果用户键入（昏迷或相反的时间段），取决于他的本地设置。@ USE1818438你能解释更多1000.75＝=＞1.00 0.75或1000，75？不（嗡嗡声！）1000.75==>1.000.75还是1000,75？不（嗡嗡声！）