[英]addTarget to button action within nib of collection view
I have a keyboard extension in iOS 11 that includes a collection view of articles coming in from JSON. 我在iOS 11中有一个键盘扩展程序,其中包括来自JSON的文章的集合视图。 I have a button in the prototype cell that I would like to allow a user to press to open the article in Safari external to the keyboard.
我在原型单元格中有一个按钮,我希望允许用户按下该按钮以在键盘外部的Safari中打开文章。 I can get it to open all links in a static URL, but I cant get it to open each article's URL.
我可以用它打开静态URL中的所有链接,但是我不能用它打开每篇文章的URL。 What am I missing?
我想念什么?
I've put an example of the working simple static action and also included what I have tried but doesn't work in this code: 我举了一个简单的静态动作示例,还包括了我尝试过但在此代码中不起作用的内容:
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
if(collectionView == self.key.colImages)
{
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "gifCollectionViewCell", for: indexPath) as! gifCollectionViewCell
cell.lblTitle.text = self.articles[indexPath.row].headline
let prefix: String = "https://res.cloudinary.com/djvbbwrnm/image/fetch/"
let options: String = "w_0.2/"
if let imageURL = self.articles[indexPath.row].imageURL
{
let articleURL = self.articles[indexPath.row].url
let url = URL(string: articleURL!)
let urlAppended = prefix+options+imageURL
cell.imgView.sd_setImage(with: URL(string: urlAppended), completed: nil)
//This works
cell.shareButton.addTarget(self, action: #selector(openLink), for: .touchUpInside)
//This doesn't
cell.shareButton.addTarget(self, action: #selector(openUrl(url: url)), for: .touchUpInside)
}
return cell
}
else
{
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "catCollectionViewCell", for: indexPath) as! catCollectionViewCell
cell.imgView.image = buttPics[indexPath.row]
cell.imgView.layer.cornerRadius = 2
cell.imgView.layer.masksToBounds = true
return cell
}
}
@objc func openLink(){
let articleURL = "http://google.com"
let url = URL(string: articleURL)
openUrl(url: url)
}
@objc func openUrl(url: URL?) {
let selector = sel_registerName("openURL:")
var responder = self as UIResponder?
while let r = responder, !r.responds(to: selector) {
responder = r.next
}
_ = responder?.perform(selector, with: url)
}
You cant add any other DataTypes
as arguments. 您不能添加任何其他数据
DataTypes
作为参数。 Because, you are adding addTarget for UIButton. 因为,您要为UIButton添加addTarget。
@objc func openLink(){
}
@objc func openLink(sender: UIButton){ // URL is not possible.
}
The above two codes are same. 以上两个代码是相同的。 In second one, you can access that
UIButton's
property
. 在第二篇中,您可以访问
UIButton's
property
。
Runnable Code 可运行代码
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
if(collectionView == self.key.colImages)
{
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "gifCollectionViewCell", for: indexPath) as! gifCollectionViewCell
cell.lblTitle.text = self.articles[indexPath.row].headline
let prefix: String = "https://res.cloudinary.com/djvbbwrnm/image/fetch/"
let options: String = "w_0.2/"
if let imageURL = self.articles[indexPath.row].imageURL
{
//let articleURL = self.articles[indexPath.row].url
//let url = URL(string: articleURL!)
let urlAppended = prefix+options+imageURL
cell.imgView.sd_setImage(with: URL(string: urlAppended), completed: nil)
//This works
cell.shareButton.addTarget(self, action: #selector(openLink), for: .touchUpInside)
//This doesn't
//cell.shareButton.addTarget(self, action: #selector(openUrl(url: url)), for: .touchUpInside)
cell.shareButton.tag = indexPath.row // SET TAG TO UIBUTTON
}
return cell
}
else
{
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "catCollectionViewCell", for: indexPath) as! catCollectionViewCell
cell.imgView.image = buttPics[indexPath.row]
cell.imgView.layer.cornerRadius = 2
cell.imgView.layer.masksToBounds = true
return cell
}
}
@objc func openLink(sender: UIButton){ // USE THIS.
let buttonTag : Int = sender.tag
let articleURL = self.articles[buttonTag].url
let url = URL(string: articleURL!)
// You can achieve by this way.
// Since I am in a keyboard extension, I added the follwoing code and it is working now.
let selector = sel_registerName("openURL:")
var responder = self as UIResponder?
while let r = responder, !r.responds(to: selector) {
responder = r.next
}
_ = responder?.perform(selector, with: url)
}
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.