NSString 中带星号的子字符串

发布于 2024-12-05 04:34:17 字数 549 浏览 0 评论 0原文

嗨，朋友们，我想在表格视图单元格中显示信用卡号码，所以我只想显示最后四个字符，例如 XXXXXXXXXX1111 第一个字符被替换为 x 或其他字符我该怎么做？帮我
我已经尝试过如下所示，

NSString *CardNumber = [CardNumberValues objectAtIndex:indexPath.row];
NSRange subStringRange = NSMakeRange(0,[CardNumber length]-4); 
NSMutableCharacterSet *NumSet = [NSMutableCharacterSet characterSetWithRange:subStringRange];
CardNumber = [[CardNumber componentsSeparatedByCharactersInSet:NumSet] componentsJoinedByString:@"X"];
cell.CardNumber.text = CardNumber;

但它不起作用，你可以建议任何参考或代码吗...

原文

Hi friends i want to display credit card number in table view cell,so i want to display only last four characters like XXXXXXXXXX1111 first charecters is replaced with x or some other character how can i do this can any one help me

i have tried like bellow

NSString *CardNumber = [CardNumberValues objectAtIndex:indexPath.row];
NSRange subStringRange = NSMakeRange(0,[CardNumber length]-4); 
NSMutableCharacterSet *NumSet = [NSMutableCharacterSet characterSetWithRange:subStringRange];
CardNumber = [[CardNumber componentsSeparatedByCharactersInSet:NumSet] componentsJoinedByString:@"X"];
cell.CardNumber.text = CardNumber;

but its not working can u suggest any reference or code...

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猥琐帝 2024-12-12 04:34:17

用这个

NSString *CardNumber = @"12345678901234";
NSString *str_padding=@"";
    NSRange subStringRange = NSMakeRange(0,[CardNumber length]-4); 
    str_padding =[str_padding stringByPaddingToLength:subStringRange.length withString:@"X" startingAtIndex:0];
    CardNumber = [CardNumber stringByReplacingOccurrencesOfString:[NSString stringWithFormat:@"%@",[CardNumber substringToIndex:subStringRange.length]] withString:str_padding];
    NSLog(@"%@",CardNumber);

Use this

NSString *CardNumber = @"12345678901234";
NSString *str_padding=@"";
    NSRange subStringRange = NSMakeRange(0,[CardNumber length]-4); 
    str_padding =[str_padding stringByPaddingToLength:subStringRange.length withString:@"X" startingAtIndex:0];
    CardNumber = [CardNumber stringByReplacingOccurrencesOfString:[NSString stringWithFormat:@"%@",[CardNumber substringToIndex:subStringRange.length]] withString:str_padding];
    NSLog(@"%@",CardNumber);

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故乡的云 2024-12-12 04:34:17

NSString *cardNumber = [NSString stringWithFormat: @"XXXX-XXXX-XXXX-%@", [[CardNumberValues objectAtIndex:indexPath.row] subStringWithIndex:12]];
cell.CardNumber.text = cardNumber;

我假设卡号是 16 位数字。

NSString *cardNumber = [NSString stringWithFormat: @"XXXX-XXXX-XXXX-%@", [[CardNumberValues objectAtIndex:indexPath.row] subStringWithIndex:12]];
cell.CardNumber.text = cardNumber;

I am assuming that card numbers are 16 digits.

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