Question

这是我想做的事情：

类似于Facebook的聊天气泡：

点按整个聊天单元格，显示UIMenuController显示自定义菜单项（目前只有一个copyAll项）
保留数据检测并允许按时间，链接等。但是，我想禁用按以突出显示文字。
单击以显示

我只能实现3中的2个.1）和2）似乎总是冲突。

现在，我可以点按以显示下面的时间。我还能够保留数据检测，并显示自定义菜单项。 但是，由于显示自定义菜单项和数据检测都使用LongPressGestureRecognizer，因此有时会使用放大镜突出显示文本，而不是我的自定义菜单项。

这是我的文字观点：

// Message text view in 
fileprivate lazy var messageTextView: CustomTextView = {
    var textView = CustomTextView()
    textView.backgroundColor = UIColor.clear
    textView.showsHorizontalScrollIndicator = false
    textView.showsVerticalScrollIndicator = false
    textView.isEditable = false
    textView.isSelectable = true
    textView.tintColor = RED_UICOLOR
    textView.dataDetectorTypes = .all
    textView.isUserInteractionEnabled = true
    textView.delegate = self

    // Long press to open custom menu controller
    let longPress = UILongPressGestureRecognizer(target: self, action: #selector(selectAllOfTextView))
    textView.addGestureRecognizer(longPress)
    return textView

    // Tap to perform 3) show time below
    let tap = UITapGestureRecognizer(target: self, action:#selector(notifyControllerToExpand))
    self.addGestureRecognizer(tap)
}()

长按会调用此选择器：

func selectAllOfTextView(recognizer: UIGestureRecognizer) {
    let loc = recognizer.location(in: self.messageTextView)
    // Pass recognizer press location over to the CustomTextView
    self.messageTextView.showMenu(location: loc)
}

这是我的CustomTextView课程：

class CustomTextView: UITextView {

// Override the touches because I don't want any funky behavior from them
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
    log.info("Touches began")
}

override func touchesMoved(_ touches: Set<UITouch>, with event: UIEvent?) {
    log.info("Touches moved")
}

override func touchesEnded(_ touches: Set<UITouch>, with event: UIEvent?) {
    log.info("Touches ended")
}

override var canBecomeFirstResponder: Bool {
    return true
}

override func canPerformAction(_ action: Selector, withSender sender: Any?) -> Bool {
    if action == #selector(copyAll(_:)) {
        return true
    }
    return false
}

// Function called by selector in the superclass
func showMenu(location: CGPoint) {
    self.becomeFirstResponder()
    let menuController = UIMenuController.shared
    let copyItem = UIMenuItem(title: "Copy", action: #selector(CustomTextView.copyAll(_:)))
    menuController.menuItems = [copyItem]
    let rect = CGRect(x: location.x - 35, y: self.frame.origin.y, width: 50, height: self.frame.height)
    menuController.setTargetRect(rect, in: self)
    menuController.setMenuVisible(true, animated: true)
}

func copyAll(_ sender: Any?) {
    UIPasteboard.general.string = self.text
}
}

Swift - Facebook聊天气泡：UITextView可以一次性选择整个文本视图，同时启用数据检测

0 个答案: