相关疑难解决方法(0)

将一块文本粘贴到UITextView时会触发什么事件？我需要在粘贴文本时修改textView的框架.

谢谢阅读.

如何检查剪贴板上是否有内容？

如果剪贴板上有内容，则执行某个操作，如果没有，则执行另一个操作（如示例代码所示）

if (if in the clipboard, that is, then open the VC) {
        let modalViewController = self.storyboard?.instantiateViewController(withIdentifier: "Clipboard") as? ClipboardViewController
        modalViewController?.modalPresentationStyle = .overCurrentContext
        self.present(modalViewController!, animated: true, completion: nil)
} else (if the clipboard is empty then) {
        let alert = UIAlertController(title: "Clipboard is Empty", message: "It's recommended you bring your towel before continuing.", preferredStyle: .alert)

        alert.addAction(UIAlertAction(title: "Yes", style: .default, handler: nil))
        alert.addAction(UIAlertAction(title: "No", style: .cancel, handler: nil))

        self.present(alert, animated: true)
}