小编six*_*six的帖子

在swift 3中,该方法向我显示"模糊地使用'enumerateObjects'",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
}
}