如何使用selectedIndex的segmentedControl来获得相应的数组索引

Question

我的代码：

class HomeViewController: UITableViewController {
    var segmentedControl: HMSegmentedControl!
    var text = [
        // 名词
        ["音读名词","训读名词","音读与训读的分辨方法"],
        // 形容词
        ["如何分辨形容词", "常用形容词", "形容词的变形规则"]
    ]

    override func viewDidLoad() {
        super.viewDidLoad()
        configForSegmentedControl()
    }

    func configForSegmentedControl() {
        segmentedControl = HMSegmentedControl(sectionTitles: ["名词","形容词","形容动词","片假名单词","动词","复合动词"])
        segmentedControl.frame = CGRectMake(0, 0, self.view.bounds.width, 44)
        segmentedControl.segmentEdgeInset = UIEdgeInsetsMake(0, 10, 0, 10)
        segmentedControl.selectionStyle = HMSegmentedControlSelectionStyleFullWidthStripe
        segmentedControl.selectionIndicatorLocation = HMSegmentedControlSelectionIndicatorLocationDown
        segmentedControl.addTarget(self, action: #selector(HomeViewController.segmentedControlChangedValue(_:)), forControlEvents: UIControlEvents.ValueChanged)
        if let font = UIFont(name: "BigYoungMediumGB2.0", size: 15) {
            segmentedControl.titleTextAttributes = [NSForegroundColorAttributeName: UIColor.blackColor(), NSFontAttributeName: font]
        }
        segmentedControl.backgroundColor = UIColor.whiteColor()
        segmentedControl.selectionIndicatorHeight = 3
        segmentedControl.selectionIndicatorColor = UIColor.blackColor()

        tableView.tableHeaderView = segmentedControl
    }

    func segmentedControlChangedValue(segmentedControl: HMSegmentedControl) {
        print("Selected index \(segmentedControl.selectedSegmentIndex) (via UIControlEventValueChanged)")
    }
}

extension HomeViewController {
    override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return text[segmentedControl.selectedSegmentIndex].count
    }

    override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
        print("cellForRowAtIndexPath:\(segmentedControl.selectedSegmentIndex)")
        let cell = tableView.dequeueReusableCellWithIdentifier("Cell", forIndexPath: indexPath)
        cell.textLabel?.text = text[segmentedControl.selectedSegmentIndex][indexPath.row]
        return cell
    }
}

下面是控制台输出：

cellForRowAtIndexPath:0 cellForRowAtIndexPath:0 cellForRowAtIndexPath:0 选定索引1(通过UIControlEventValueChanged) 选定索引0(通过UIControlEventValueChanged)

cellForRowAtIndexPath在segmentedControlChangedValue之前被调用，这就是为什么我不能获得正确的索引来获取文本数组的元素。那我该怎么办？

Answer 1

备注:如果您想要cellForRow中的值，那么您应该重新加载'segmentedControlChangedValue‘中的表视图

通常情况下，要根据选择/操作设置单元格，应根据需要重新加载/beginUpdates表视图。