1、用NSCalendar

獲得如下格式：

-(NSString *)getDateString{

NSDate *date = [NSDatedate];

NSArray * arrWeek=[NSArrayarrayWithObjects:@"星期日",@"星期一",@"星期二",@"星期三",@"星期四",@"星期五",@"星期六", nil];

NSCalendar *calendar = [NSCalendarcurrentCalendar];

NSDateComponents *components = [calendar components:NSCalendarUnitYear

NSInteger year=[components year];

NSInteger month=[components month];

NSInteger day=[components day];

NSInteger week =[components weekday]-1;

NSString *  nsDateString= [NSStringstringWithFormat:@"%4ld-%2ld-%ld %@",year,month,day,[arrWeek

   //格式在這裡拼裝

return nsDateString;

}

2、用NSDateFormatter

NSDate *date = [NSDatedate];  

NSDateFormatter *dateformatter = [[NSDateFormatteralloc]init];

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

       //[dateFormatter setDateFormat:@"yyyy-MM-dd HH:mm:ss"];設定格式

NSString

      [dateformatter setDateFormat:@"HH:mm:ss"];

//[dateformatter setDateFormat:@"HH-mm-ss"];  設定格式

NSString *  timeStr=[dateformatter stringFromDate:date];

NSLog(@"date =%@ ",dateStr);

NSLog(@"time =%@ ",timeStr);

執行結果

date =2016-06-25

time =17:30:32