Question

我一直在努力尝试从 Objective-C

翻译此代码

NSDictionary * options = [NSDictionary dictionaryWithObject:[NSNumber numberWithInteger:UIPageViewControllerSpineLocationMid] forKey:UIPageViewControllerOptionSpineLocationKey];

... Swift

var options:NSDictionary = NSDictionary.dictionaryWithObjects(UIPageViewControllerSpineLocation.Mid, forKeys: UIPageViewControllerOptionSpineLocationKey, count: 0);

不幸的是它不起作用，我不知道为什么！以下是 XCode 的输出报告：

无法使用类型'的参数列表调用'dictionaryWithObjects'（UIPageViewControllerSpineLocation，对于keys：NSString！，count：IntegerLiteralConvertible）'

有人能帮助我吗？感谢

Answer 1

怎么样只是

    let options = [UIPageViewControllerOptionSpineLocationKey: UIPageViewControllerSpineLocation.Mid];`

你面临的问题是构造函数NSDictionary.dictionaryWithObjects - a）不存在，b）枚举不是AnyObject，c）count是0但应该是1

    let o = UIPageViewControllerSpineLocation.Mid.toRaw() //toRaw makes it conform to AnyObject
    let k = UIPageViewControllerOptionSpineLocationKey
    let options = NSDictionary(object: o, forKey: k)

在Swift中初始化NSDictionary的麻烦

1 个答案: