你对UITextView的行间距有什么想法吗？我不能应用它。下面是我的代码。importUIKitclassDetailViewController:UIViewController{@IBOutletweakvaritemTextView:UITextView!vartxtString:String?vartxtTitleBar:String?overridefuncviewDidLoad(){super.viewDidLoad()//navigationController?.navigationItem.title="Love"self.title=txtTitleBar//se