Objective-C日期时间处理-优快云博客

本文介绍了使用Objective-C进行日期和时间处理的方法。一种方法是利用NSDateFormatter格式化NSDate对象为指定格式的字符串；另一种方法是通过NSCalendar组件来获取当前日期的时间元素，并将这些元素拼接成一个完整的日期时间字符串。

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- (void)getDateOne

{

    NSDate *date = [NSDate date];

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


    [formatter setDateStyle:NSDateFormatterMediumStyle];

    [formatter setTimeStyle:NSDateFormatterShortStyle];

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

NSString *DateTime = [formatter stringFromDate:date];

NSLog(@"%@============年-月-日时：分：秒=====================",DateTime);

}

方式二：XXXX年-X月-X日 XX时:XX分:XX秒的格式
- (void)getDateTwo

NSDate *now = [NSDate date];
    NSLog(@"now date is: %@", now);

    NSCalendar *calendar = [NSCalendar currentCalendar];
    NSUInteger unitFlags =

    NSInteger year = [dateComponent year];
    NSInteger month = [dateComponent month];
NSInteger day = [dateComponent day];
    NSInteger hour = [dateComponent hour];
    NSInteger minute = [dateComponent minute];
    NSInteger second = [dateComponent second];


    NSLog(@"year is: %ld", (long)year);
    NSLog(@"month is: %ld", (long)month);
    NSLog(@"day is: %ld", (long)day);
    NSLog(@" hour is: %ld", (long)hour);
    NSLog(@"minute is: %ld", (long)minute );
    NSLog(@"second is: %ld", (long)second);
   //字符串的转化并且拼接
      NSString *yearstr=[NSString stringWithFormat:@"%ld-",(long)year];
      NSString *monthstr=[NSString stringWithFormat:@"%ld-",(long)month];
     NSString *daystr=[NSString stringWithFormat:@"%ld ",(long)day];
     NSString *hourstr=[NSString stringWithFormat:@"%ld:",(long)hour];
    NSString *minutestr=[NSString stringWithFormat:@"%ld:",(long)minute];
    NSString *secondstr=[NSString stringWithFormat:@"%ld",(long)second];
    //字符串开始拼接
    NSString *allstr=[yearstr stringByAppendingString:monthstr];
    NSString *allstr1=[allstr stringByAppendingString:daystr];
    NSString *allstr2=[allstr1 stringByAppendingString:hourstr];
    NSString *allstr3=[allstr2 stringByAppendingString:minutestr];
    NSString *DateTime=[allstr3 stringByAppendingString:secondstr];
    NSLog(@"最后年月日时分秒拼接的结果=====%@",DateTime);