Question

我正在使用一个功能来添加。在字符串中的每三个字符之后。但是如何在数字前删除“0”。

-(NSString *)formatStringAsIpAddress:(NSString*)MacAddressWithoutColon
{
    NSMutableString *macAddressWithColon = [NSMutableString new];
    for (NSUInteger i = 0; i < [MacAddressWithoutColon length]; i++)
    {
        if (i > 0 && i % 3 == 0)
            [macAddressWithColon appendString:@"."];
        unichar c = [MacAddressWithoutColon characterAtIndex:i];
        [macAddressWithColon appendString:[[NSString alloc] initWithCharacters:&c length:1]];
    }
    return macAddressWithColon;
}

如果我有ip地址010.000.001.016 我怎样才能像10.0.1.16一样进行设置？如果我有IP地址192.168.001.001？如何从IP地址中删除前0？

Answer 1

我建议：

    NSString *ipAddress = @"010.000.001.016";

将字符串拆分为子字符串数组：

NSArray *ipAddressComponents = [myString componentsSeparatedByString:@"."];

使用for循环运行数组，并将转换分别运行到int表示：

for(int i = 0; i < ipAddressComponents.count;i++)
{
    [ipAddressComponents objectAtIndex:i] = [NSString stringWithFormat:@"%d",[[ipAddressComponents objectAtIndex:i]intValue]];
}

将数组重新加入字符串

NSString *newIpAddress = [ipAddressComponents componentsJoinedByString:@"."];

这应该导致获得IP地址：10.0.1.16

Answer 2

您可以使用字符串函数，并在componentsSeparatedByString和componentsJoinedByString函数的帮助下获得预期的输出。

使用以下方法：

-(NSString*)removeZeroPrefix:(NSString*)aStrIP{

    NSMutableArray *subStringArray = [[NSMutableArray alloc] init];

    NSArray *arrayOfSubString = [aStrIP componentsSeparatedByString:@"."];

    for (NSString *aSingleString in arrayOfSubString)
    {
        [subStringArray addObject:[NSNumber numberWithInteger:[aSingleString integerValue]]];
    }

    return [subStringArray componentsJoinedByString:@"."];

}

用法：

[self removeZeroPrefix:@"010.000.001.016"];
[self removeZeroPrefix:@"192.168.001.001"];

输出

Printing description of aStrIP:
10.0.1.16
Printing description of aStrIP:
192.168.1.1

希望这会有所帮助！

Answer 3

在Swift中

let ip = "0125.052.000.10"
        let split = ip.components(separatedBy: ".")
        for number in split {
            if let isNumber = Int(number){
                print(isNumber) // add this isNumber into array which is shows without initial zeros.
            }
        }

最后将创建的数组作为String加入点组件

如何将字符串转换为IP地址？

3 个答案: