ios - swift 3.0 : Value of type 'IndexSet' has no member 'enumerateIndexesUsingBlock'

Question

接收 “IndexSet”类型的值在 enumerateIndexesUsingBlock 处没有成员“enumerateIndexesUsingBlock” 错误。

/**
Extension for creating index paths from an index set
*/
extension IndexSet {
    /**
    - parameter section: The section for the created NSIndexPaths
    - return: An array with NSIndexPaths
    */
    func bs_indexPathsForSection(_ section: Int) -> [IndexPath] {
        var indexPaths: [IndexPath] = []

        self.enumerateIndexesUsingBlock { (index:Int, _) in
            indexPaths.append(IndexPath(item: index, section: section));
        }

        return indexPaths
    }
}

Answer 1

基础类型 NSIndexSet 有一个 enumerateIndexesUsingBlock方法。来自 Swift 3 的相应覆盖类型 IndexSet 是一个集合，因此您可以映射IndexPath 的索引:

extension IndexSet {
    func bs_indexPathsForSection(_ section: Int) -> [IndexPath] {
        return self.map { IndexPath(item: $0, section: section) }
    }
}