iOS 疯狂基础之NSDate 时间

    //初始化时间

    NSDate * today = [NSDate date];

   NSDateFormatter * formatter = [[NSDateFormatteralloc]init];

    [formatter setDateFormat:@"YYYY-MM-dd"];

    dateFrom.text = [formatter stringFromDate:today];

将字符串dateStr转化为nsdate    NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];     [dateFormatter setDateFormat:@"y-M-d HH:mm:ss"];    NSDate *date=[dateFormatter dateFromString:dateStr];