在iOS11, iOS12上UITextView會有個奇怪的動畫??
之前
這個動畫看起來很難受，特別是文本比較多的時候，所以還是把它去除掉吧??
之后
class SKTextView: UITextView {
override init(frame: CGRect, textContainer: NSTextContainer?) {
super.init(frame: frame, textContainer: textContainer)
pasteDelegate = self
}
}
extension SKTextView: UITextPasteDelegate {
func textPasteConfigurationSupporting(_ textPasteConfigurationSupporting: UITextPasteConfigurationSupporting, shouldAnimatePasteOf attributedString: NSAttributedString, to textRange: UITextRange) -> Bool {
return false
}
}
解釋: 在合適的地方去實現一下UITextView的pasteDelegate即可，比如自定義的UITextView子類
