ios - NSProcessInfo().systemUptime 错误

Question

NSTimeInterval我在系统重启后遇到了麻烦。这个函数给了我一个错误的结果。当设备的电池充满电时，重启时间会重新开始。iPhone 5s 和 iPad 3（新）有问题。我该如何解决？

Answer 1

我使用这种方法，它对我有帮助

 public static func uptime() -> (days: Int, hrs: Int, mins: Int, secs: Int) {
            var currentTime = time_t()
            var bootTime    = timeval()
            var mib         = [CTL_KERN, KERN_BOOTTIME]

            // NOTE: Use strideof(), NOT sizeof() to account for data structure
            // alignment (padding)
            // http://stackoverflow.com/a/27640066
            // https://devforums.apple.com/message/1086617#1086617
            var size = strideof(timeval)

            let result = sysctl(&mib, u_int(mib.count), &bootTime, &size, nil, 0)

            if result != 0 {
                #if DEBUG
                    print("ERROR - \(__FILE__):\(__FUNCTION__) - errno = "
                        + "\(result)")
                #endif

                return (0, 0, 0, 0)
            }