NS_REQUIRES_NIL_TERMINATION NS_

要自定义一个alertView 去看原生的api 不想传字符串数组，想像他一样传多个NSString，然后接口写好如何取不会了，查资料 发现了这个 留存
https://developer.apple.com/library/content/qa/qa1405/_index.html

我这块的代码

- (instancetype)initWithTitle:(NSString *)titles andImage:(UIImage *)promptImage cancleButton:(NSString *)cancleButton otherButtons:(NSString *)otherButtons, ...
{
    if (self = [super init]) {
        self.alertTitle = titles;
        self.promptImage = promptImage;
        self.cancleButtonTitle = cancleButton;
        NSMutableArray *otherBtnsArr = [[NSMutableArray alloc] init];
        id eachObject;
        va_list argumentList;
        if (otherButtons) // The first argument isn't part of the varargs list,
        {                                   // so we'll handle it separately.
            [otherBtnsArr addObject: otherButtons];
            va_start(argumentList, otherButtons); // Start scanning for arguments after firstObject.
            while ((eachObject = va_arg(argumentList, id))) // As many times as we can get an argument of type "id"
                [otherBtnsArr addObject: eachObject]; // that isn't nil, add it to self's contents.
            va_end(argumentList);
        }
        NSLog(@"%@",otherBtnsArr);
    }
    return self;
}