Ios5 NSNumberFormatter numberFromString不'；t从货币字符串返回数字

控制台输出：25KR

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附言：价格为零。

目前，我得到的NSNumber是这样的（但这很奇怪）：

numberFormatter = [[NSNumberFormatter alloc] init];
numberFormatter.numberStyle = NSNumberFormatterCurrencyStyle;    
NSLog(_priceTF.text);
NSNumber *price = [numberFormatter numberFromString:_priceTF.text];
NSLog([price stringValue]);

NSString *priceNoCurrency = [_priceTF.text stringByReplacingOccurrencesOfString:numberFormatter.currencySymbol withString:@""];
NSNumber *price = @(priceNoCurrency.integerValue);