iOS将IP地址转换为整数和反向

Question

假设我有一个NSString NSString*myIpAddress = @"192.168.1.1"

我想将其转换为整数 - 增加它然后将其转换回NSString.

除了使用位掩码和移位以及sprintf之外,iOS还有一种简单的方法吗？

Answer 1

这样的事情就是我在我的应用程序中所做的:

NSArray *ipExplode = [string componentsSeparatedByString:@"."];
int seg1 = [ipExplode[0] intValue];
int seg2 = [ipExplode[1] intValue];
int seg3 = [ipExplode[2] intValue];
int seg4 = [ipExplode[3] intValue];

uint32_t newIP = 0;
newIP |= (uint32_t)((seg1 & 0xFF) << 24);
newIP |= (uint32_t)((seg2 & 0xFF) << 16);
newIP |= (uint32_t)((seg3 & 0xFF) << 8);
newIP |= (uint32_t)((seg4 & 0xFF) << 0);

newIP++;
NSString *newIPStr = [NSString stringWithFormat:@"%u.%u.%u.%u", 
        ((newIP >> 24) & 0xFF), 
        ((newIP >> 16) & 0xFF), 
        ((newIP >> 8) & 0xFF), 
        ((newIP >> 0) & 0xFF)];