OC erminating app due to uncaught exception NSInvalidArgumentException object

OC erminating app due to uncaught exception NSInvalidArgumentException object cannot be nil

*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '*** -[__NSArrayM insertObject:atIndex:]: object cannot be nil'

报错问题

注意图片有没有加载进Assets文件，图片名字是否写对了

for(int i = 1; i < 6; i++)
    {
        //把名字拿出来
        NSString * imgName = [NSString stringWithFormat:@"%d.jpeg",i];
        
        //根据图片名称加载图片
        UIImage * imgRun = [UIImage imageNamed:imgName];
        
        //将图片加载到数组里
        [arrayM addObject:imgRun];
    }

当时循环条件写错了