iOS 解决时间相差8小时问题

原因: 使用 NSDate *date = [NSDate date]; 获取的时间是标注的UTC时间,和北京时间相差8小时.将UTC时间转成当地的时间只需要设置  NSTimeZone *zone = [NSTimeZone systemTimeZone];

1.给NSDate设置时区

    NSDate *date = [NSDate date];

    NSTimeZone *zone = [NSTimeZone systemTimeZone];

    NSInteger interval = [zone secondsFromGMTForDate: date];

    NSDate *localeDate = [date  dateByAddingTimeInterval: interval];

2.给NSDateFormatter设置时区

    NSDateFormatter *formater = [[NSDateFormatter alloc]init];

    [formater setDateFormat:@"yyyy年MM月dd日"];

    [formater setTimeZone:[NSTimeZone localTimeZone]];

    NSDate *date = [formater dateFromString:dateStr];