Swift 数组的 removeObjectsAtIndexes [英] removeObjectsAtIndexes for Swift arrays

问题描述

什么是等同于 NSMutableArray 的 -removeObjectsAtIndexes: 的 Swift 数组?一一删除每个索引是行不通的，因为删除一个索引后剩余的索引会发生变化.实现此功能的有效方法是什么?

What is a Swift array equivalent to NSMutableArray's -removeObjectsAtIndexes:? Removing each index one by one doesn't work, as remaining indexes will shift after removing one index. What's an efficient way to implement this functionality?

推荐答案

这是我目前使用的解决方案:

Here is the solution I currently use:

extension Array {
    mutating func removeObjectAtIndexes(indexes: [Int]) {
        var indexSet = NSMutableIndexSet()

        for index in indexes {
            indexSet.addIndex(index)
        }

        indexSet.enumerateIndexesWithOptions(.Reverse) {
            self.removeAtIndex($0.0)
            return
        }
    }

    mutating func removeObjectAtIndexes(indexes: Int...) {
        removeObjectAtIndexes(indexes)
    }
}

这篇关于Swift 数组的 removeObjectsAtIndexes的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！