自己的笔记 NSDateFormat 将传入数字转为mm:ss 格式

代码

-(NSString *)formatTimeWithSec:(int)second

{

   NSString *timeStr=[NSStringstringWithFormat:@"%2d%2d",second/60,second%60];

    

    NSDateFormatter *inputFormat=[[NSDateFormatteralloc]init];

    [inputFormatsetDateFormat:@"mmss"];

   NSDate *inputDate=[inputFormat dateFromString:timeStr];

    NSLog(@"date = %@", inputDate);

    

    NSDateFormatter *outFormat=[[NSDateFormatteralloc]init];

    [outFormatsetDateFormat:@"mm:ss"];

   NSString *outTimeStr=[outFormat stringFromDate:inputDate];

   NSLog(@"%@,,,%@",timeStr,outTimeStr);

   return outTimeStr;

}