1.浮点类型转时间类型
float timeLength = 15.456734
NSTimeInterval timeInterval = timeLength;
NSInteger min = timeInterval / 60;
//获取秒数
NSInteger sec = (NSInteger)timeInterval % 60;
float timeLength = 15.456734
NSTimeInterval timeInterval = timeLength;
NSInteger min = timeInterval / 60;
NSInteger sec = (NSInteger)timeInterval % 60;