iOS 日期字符串转时间戳

/**

根据时间获取时间戳

@param formatTime 时间

@param matter 时间格式

@return 时间戳

*/

+(NSInteger)timeSwitchTimestamp:(NSString *)formatTime Formatter:(NSString *)matter{

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

[formatter setDateStyle:NSDateFormatterMediumStyle];

[formatter setTimeStyle:NSDateFormatterShortStyle];

[formatter setDateFormat:matter];

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

[formatter setTimeZone:timeZone];

NSDate* date = [formatter dateFromString:formatTime]; 

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

return timeSp;

}