Getting system uptime in iOS/Swift

Question

Is there a way to get system uptime in iOS (using Swift)? What I need is to measure time without having to worry about the user changing the time. In Android there\'s a

Answer 1

You can call ObjC code from Swift:

print(SystemUtil().uptime());

Write a ObjC class like the accepted answer you mentioned: Getting iOS system uptime, that doesn't pause when asleep.

SystemUtil.h for interface:

#import 

@interface SystemUtil : NSObject

- (time_t)uptime;

@end

SystemUtil.m for implementation:

#import "SystemUtil.h"
#include 

@implementation SystemUtil

- (time_t)uptime
{
    struct timeval boottime;
    int mib[2] = {CTL_KERN, KERN_BOOTTIME};
    size_t size = sizeof(boottime);
    time_t now;
    time_t uptime = -1;

    (void)time(&now);

    if (sysctl(mib, 2, &boottime, &size, NULL, 0) != -1 && boottime.tv_sec != 0) {
        uptime = now - boottime.tv_sec;
    }
    return uptime;
}

@end

And don't forget to include a -Bridge-Header.h with the following content so that you can use the ObjC class from Swift ( is your project name):

#import "SystemUtil.h"