ios - 错误 : Use of unresolved identifier 'indexPath'

Question

我有一个打开 UIActivityViewController 的 IBAction:

@IBAction func share(sender: UIButton) {

    let defaultText = "Check out my Pinpoint: " + self.pinpoints[indexPath.row].main + ". Get Pinpoint on the iOS App Store!"
        if let imageToShare = UIImage(data: self.pinpoints[indexPath.row].image) {
            let activityController = UIActivityViewController(activityItems: [defaultText, imageToShare], applicationActivities: nil)
            self.presentViewController(activityController, animated: true, completion: nil)
    }
}

错误出现在第二行和第三行(从 let defaultText 和 if let imageToShare 开始。)它说:

Use of unresolved identifier 'indexPath'

单词pinpoints是一个存储main(UILabel)和图像(UIImageView)的数组。

如何解决此错误？

Answer 1

只需在 cellforRowAtIndexPath 中为您的按钮提供一个标记，该标记将等于indexPath.row

someButton.tag = indexPath.row

现在你的函数应该是:

IBAction func share(sender: UIButton) { 
    let defaultText = "Check out my Pinpoint: " + self.pinpoints[sender.tag].main + ". Get Pinpoint on the iOS App Store!" 
    if let imageToShare = UIImage(data: self.pinpoints[sender.tag].image) { 
        let activityController = UIActivityViewController(activityItems: [defaultText, imageToShare], applicationActivities: nil)
         self.presentViewController(activityController, animated: true, completion: nil) 
    } 
}