如何正确设置uicollectionviewcells？

Question

我有uicollectionview作为聊天视图，而uicollectionviewcell是聊天消息。一些消息具有链接，我的collectionView（_：cellForItemAt :)调用setupCell（cell：message :)函数

fileprivate func setupCell(cell: ChatMessageCell, message: RequestMessage) {

var attributedString = NSMutableAttributedString()

if let url = message.url {

    attributedString = NSMutableAttributedString(string: message.messageText, attributes:[NSAttributedStringKey.link: url, NSAttributedStringKey.font: UIFont.systemFont(ofSize: 16)])
    cell.textView.attributedText = attributedString
    cell.textView.delegate = self
}

}

问题是当我快速滚动时，其他单元格也变为链接。

What I want after feral scrolling

What I have

Answer 1

请在其他部分写一些东西。 喜欢：

 if let url = message.url {

    attributedString = NSMutableAttributedString(string: message.messageText, attributes:[NSAttributedStringKey.link: url, NSAttributedStringKey.font: UIFont.systemFont(ofSize: 16)])
    cell.textView.attributedText = attributedString
    cell.textView.delegate = self
} else {
   //Some code
}

希望它会为您提供帮助。谢谢。

Answer 2

如果不是链接，则设置UITextView的text属性。

fileprivate func setupCell(cell: ChatMessageCell, message: RequestMessage) {

cell.textView.attributedText = nil
var attributedString = NSMutableAttributedString()

if let url = message.url {

    attributedString = NSMutableAttributedString(string: message.messageText, attributes:[NSAttributedStringKey.link: url, NSAttributedStringKey.font: UIFont.systemFont(ofSize: 16)])
    cell.textView.attributedText = attributedString
    cell.textView.delegate = self
}
else{
    cell.textView.text = message.messageText
    cell.textView.delegate = self
    }

Answer 3

通过设置没有链接字段的相同属性解决了属性问题。如果您知道更清洁的决定，请写下来。

var attributedString = NSMutableAttributedString()

if let url = message.url {

attributedString = NSMutableAttributedString(string: message.messageText, attributes:[NSAttributedStringKey.link: url, NSAttributedStringKey.font: UIFont.systemFont(ofSize: 16)])
cell.textView.attributedText = attributedString
cell.textView.delegate = self
} else {
cell.textView.attributedText = NSMutableAttributedString(string: message.messageText, attributes:[NSAttributedStringKey.font: UIFont.systemFont(ofSize: 16)])
}