I'm toying with iOS SDK, and I'm trying to change the device's date and time programmatically. I read that it's not possible with the standard SDK, which makes sense, but I'm wondering if it's possible to do so with the private APIs, as I'm just doing an app as a study, and do not intend to publish it on the App Store
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试):
问题:
回答1:
1) Add to your app entitlements com.apple.timed
key with bool value set to YES
2) Disable automatic time setting (and timezone if you want)
Link to private CoreTime.framework
. Declare these functions
void TMSetAutomaticTimeEnabled(BOOL);
void TMSetAutomaticTimeZoneEnabled(BOOL);
Disable automatic time setting
TMSetAutomatocTimeEnabled(YES);
If you want to know in which state these settings are you can use these functions
BOOL TMIsAutomaticTimeEnabled();
BOOL TMIsAutomaticTimeZoneEnabled();
3) Change current date and time
Declare these
struct timezone
{
int tz_minutewest;
int tz_dsttime;
};
void settimeofday(struct timeval*, struct timezone*);
This API is public in OS X so you can find documentation here https://developer.apple.com/library/ios/documentation/System/Conceptual/ManPages_iPhoneOS/man2/settimeofday.2.html
As an example we will set clock 10 minutes forward
struct timeval tv;
tv.tv_sec = [[NSDate dateWithTimeIntervalSinceNow:600] timeIntervalSince1970];
tv.tv_usec = 0;
settimeofday(&tv, NULL);
4) Notify about date/time change
CFNotificationCenterPostNotification(CFNotificationCenterGetDarwinNotifyCenter(), CFSTR("SignificantTimeChangeNotification"), NULL, NULL, CFNotificationSuspensionBehaviorDeliverImmediately);