swift3 - swift 3，PHFetchResult.enumerateObjects 错误

Question

在 swift 3 中，该方法向我显示“'enumerateObjects' 的使用不明确”，发生了什么。我该怎么办？

extension PHFetchResult {
public func assetCollection() -> [PHAssetCollection] {
    var list :[PHAssetCollection] = []
    self.enumerateObjects { (object, index, stop) in
        if object is PHAssetCollection {
            let collection = object as! PHAssetCollection
            list.append(collection)
        }
    }
    return list
}
}

Answer 1

Swift 3.0:只需在 enumerateObjects 之后的大括号之前添加圆括号即可。

extension PHFetchResult {
  public func assetCollection() -> [PHAssetCollection] {
    var list :[PHAssetCollection] = []
    self.enumerateObjects ({ (object, index, stop) in
        if object is PHAssetCollection {
            let collection = object as! PHAssetCollection
            list.append(collection)
        }
    })
    return list
  }
}