1.

- (NSDate*)localeDate:(NSDate*)date {    NSTimeZone *zone = [NSTimeZone systemTimeZone];    NSInteger interval = [zone secondsFromGMTForDate: date];    NSDate *localeDate = [date dateByAddingTimeInterval: interval];    return localeDate;｝

    2.

[dateFormat setTimeZone:[NSTimeZone timeZoneWithAbbreviation:@"UTC"]];