IOS开发中时间与时间戳的相互转换

//获取当前系统时间的时间戳

#pragma mark - 获取当前时间的 时间戳

+(NSInteger)getNowTimestamp{

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

 [formatter setDateStyle:NSDateFormatterMediumStyle];

 [formatter setTimeStyle:NSDateFormatterShortStyle];

 [formatter setDateFormat:@"YYYY-MM-dd HH:mm:ss"]; // ----------设置你想要的格式,hh与HH的区别:分别表示12小时制,24小时制

 //设置时区,这个对于时间的处理有时很重要

 NSTimeZone* timeZone = [NSTimeZone timeZoneWithName:@"Asia/Beijing"];

 [formatter setTimeZone:timeZone];

 NSDate *datenow = [NSDate date];//现在时间

 

 NSLog(@"设备当前的时间:%@",[formatter stringFromDate:datenow]);

 //时间转时间戳的方法:

 

 NSInteger timeSp = [[NSNumber numberWithDouble:[datenow timeIntervalSince1970]] integerValue];

 

 NSLog(@"设备当前的时间戳:%ld",(long)timeSp); //时间戳的值

 

 return timeSp;

}

 

//将某个时间转化成 时间戳

#pragma mark - 将某个时间转化成 时间戳

+(NSInteger)timeSwitchTimestamp:(NSString *)formatTime andFormatter:(NSString *)format{

 

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

 [formatter setDateStyle:NSDateFormatterMediumStyle];

 [formatter setTimeStyle:NSDateFormatterShortStyle];

 [formatter setDateFormat:format]; //(@"YYYY-MM-dd hh:mm:ss") ----------设置你想要的格式,hh与HH的区别:分别表示12小时制,24小时制

 

 NSTimeZone* timeZone = [NSTimeZone timeZoneWithName:@"Asia/Beijing"];

 [formatter setTimeZone:timeZone];

 

 NSDate* date = [formatter dateFromString:formatTime]; //------------将字符串按formatter转成nsdate

 //时间转时间戳的方法:

 NSInteger timeSp = [[NSNumber numberWithDouble:[date timeIntervalSince1970]] integerValue];

 

 NSLog(@"将某个时间转化成 时间戳&&&&&&&timeSp:%ld",(long)timeSp); //时间戳的值

 

 return timeSp;

}

 

//将某个时间戳转化成 时间

#pragma mark - 将某个时间戳转化成 时间

+(NSString *)timestampSwitchTime:(NSInteger)timestamp andFormatter:(NSString *)format{

 

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

 [formatter setDateStyle:NSDateFormatterMediumStyle];

 [formatter setTimeStyle:NSDateFormatterShortStyle];

 [formatter setDateFormat:format]; // （@"YYYY-MM-dd hh:mm:ss"）----------设置你想要的格式,hh与HH的区别:分别表示12小时制,24小时制

 NSTimeZone *timeZone = [NSTimeZone timeZoneWithName:@"Asia/Beijing"];

 [formatter setTimeZone:timeZone];

 NSDate *confromTimesp = [NSDate dateWithTimeIntervalSince1970:timestamp];

 NSLog(@"1296035591 = %@",confromTimesp);

 

 NSString *confromTimespStr = [formatter stringFromDate:confromTimesp];

 

 //NSLog(@"&&&&&&&confromTimespStr = : %@",confromTimespStr);

 

 return confromTimespStr;

}