NSTimeZone isDaylightSavingTime example ios

isDaylightSavingTime

Returns a Boolean value that indicates whether the receiver is currently using daylight saving time.

- (BOOL)isDaylightSavingTime

Return Value

YES if the receiver is currently using daylight savings time, otherwise NO.

Discussion

This method invokes isDaylightSavingTimeForDate: with the current date as the argument.

Example of [NSTimeZone isDaylightSavingTime]

NSTimeZone *easternTimeZone = [NSTimeZone timeZoneWithName:@"US/Eastern"];
if ([easternTimeZone isDaylightSavingTime]) {
    NSLog(@"East coast is NOT on DT");
} else {
    NSLog(@"East coast is on DT");      
}

Example of [NSTimeZone isDaylightSavingTime]

NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:@"M/d h:mm a"];
if([[NSTimeZone systemTimeZone] isDaylightSavingTime]) {
    NSLog(@"DLS");
}

[NSTimeZone resetSystemTimeZone];
[dateFormatter setTimeZone:[NSTimeZone systemTimeZone]];