小编Lar*_*ars的帖子

double duration = 20; // duration is in seconds 

NSDate* durationDate = [[NSDate alloc]initWithTimeIntervalSinceReferenceDate:duration];

NSDateFormatter *formatter = nil;


formatter = [[[NSDateFormatter alloc] init] autorelease];
[formatter setDateFormat:@"mm:ss"];

NSString *durationString=[formatter stringFromDate:durationDate];//here durationString should have 20 

但我到了30:20？从这里加入30分钟.我试过给出更大的数字然后同样的结果

请让我知道对此的想法以及如何解决这个问题