swift 错误 : Ambiguous reference to member 'subscript'

Question

我是编码新手，选择了一些开源项目来了解这个想法。

我收到错误:

Ambiguous reference to member 'subscript'

在下面的代码中:

let pictures = ( selectedRestaurant["Pictures"] as! NSArray ) // Error

let picture = ( pictures[zoomedPhotoIndex] as! NSDictionary )

let pictureURL = picture["url"] as! String

let imageURL = NSURL(string: pictureURL)
let urlRequest = NSURLRequest(URL: imageURL!)
NSURLConnection.sendAsynchronousRequest(urlRequest, queue: NSOperationQueue.mainQueue()) {
    response, data, error in
    if error == nil && data != nil {

        self.imageView.image = UIImage(data: data!)
        self.imageView.contentMode = UIViewContentMode.ScaleAspectFit

    }
}

Answer 1

只需明确指定图片的类型:

所以代替:

let pictures = selectedRestaurant["Pictures"] as! NSArray

写:

let pictures: NSArray = selectedRestaurant["Pictures"] as! NSArray