自己写的分秒转换，用到自己做的在线音乐播放器上的
-(NSString *)changeTimeToString:(float)time{ NSString* timeend; NSString* timestr=[NSString stringWithFormat:@"%f",time]; int inttime=[timestr intValue]; int minute=inttime/60; int second=inttime%60; NSString* secondstr=[NSString stringWithFormat:@"%d",second]; if ([secondstr length]==1) timeend=[NSString stringWithFormat:@"%d:0%d",minute,second]; else timeend=[NSString stringWithFormat:@"%d:%d",minute,second]; return timeend;}
