Has the iOS system adapted to the time zone policy of British Columbia, Canada? If the iPhone's system time zone is set to America/Edmonton, what result should the code below return after adapting? [[NSTimeZone systemTimeZone] isDaylightSavingTime] [[NSTimeZone systemTimeZone] secondsFromGMT] [[NSTimeZone systemTimeZone] daylightSavingTimeOffset]

On my app, some custom views are behind the navigation bar. On systems below iOS 26, I use this code to make the navigation bar transparent： self.navigationController.navigationBar.translucent = YES; self.navigationController.navigationBar.barTintColor = [UIColor clearColor]; [self.navigationController.navigationBar setBackgroundImage:[[UIImage alloc] init] forBarMetrics:UIBarMetricsDefault]; [self.navigationController.navigationBar setShadowImage:[[UIImage alloc] init]]; It works fine and the custom views show up well. But on iOS 26, the navigation bar adds a gradient layer, so the custom views get blocked, which looks a bit weird. Is there a way to remove the gradient layer from the iOS 26 navigation bar?

Can Xcode15 compile on an iPhone of iOS18？I want to update my iPhone to iOS18， but I do not want to update my Xcode.