将时间值作为对象存储在数组中,并且随机访问。但是系统报错。
代码:
NSMutableArray *timer=[[NSMutableArray alloc]init];
[timer addObject:[NSNumber numberWithDouble:timeOne]];
[timer addObject:[NSNumber numberWithDouble:timeTwo]];
int timeIndex = arc4random() % [timer count];
double timeToBeUse=[NSNumber numberWithDouble:[timer objectAtIndex:timeIndex]]
这行:double timeToBeUse=[NSNumber numberWithDouble:[timer objectAtIndex:timeIndex]];
报出错误: Sending id to parameter of incompatible type 'double'
请前辈帮忙,谢谢。