Question

courseData是一个struct对象数组。每个对象有9个字符串变量（holeNumber，Par，SI等）。单元格填充正常，但是当您单击一行时，我试图获取一个详细视图控制器，以使用与该行相关的变量courseImage填充图像视图。显示完整代码。 courseImage变量仍然显示为nil。

override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    return courseData.count
}

override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCellWithIdentifier("Hole") as UITableViewCell

    let item = courseData[indexPath.row]

    let holeLabel = cell.viewWithTag(1) as UILabel
    holeLabel.text = item.holeNumber

    let parLabel = cell.viewWithTag(2) as UILabel
    parLabel.text = item.par

    let siLabel = cell.viewWithTag(3) as UILabel
    siLabel.text = item.SI

    let wyLabel = cell.viewWithTag(4) as UILabel
    wyLabel.text = item.whiteYards

    let yyLabel = cell.viewWithTag(5) as UILabel
    yyLabel.text = item.yellowYards

    let ryLabel = cell.viewWithTag(6) as UILabel
    ryLabel.text = item.redYards

    let photo = item.image
    let placeholder = cell.viewWithTag(7) as UIImageView
    placeholder.image = UIImage(named: photo)


    return cell
}

func tableView(tableView: UITableView, didselectRowAtIndexPath     indexPath: NSIndexPath) {

    let courseSection = courseData[tableView.indexPathForSelectedRow()!.row]

    var tipPic = courseSection.plan
    var courseImage : UIImage = UIImage(named: tipPic)!

    func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
        var destViewController : DetailViewController = segue.destinationViewController as DetailViewController
        if (segue.identifier == "courseTip") {

        destViewController.receivedPic = courseImage
        }

Answer 1

这是因为您在didDeselect委托方法中添加代码，这意味着当前没有选定的行。

我相信你的意思是在你的didSelect活动中这样做。

为什么我的变量为零？

1 个答案: