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;

}