ios - 如何在iOS swift中隐藏/查看标题 View 表

Question

我有静态 UItableview 来保存用户表单。我在表格中添加了标题 View 以显示电子邮件验证文件我的问题是标题没有显示隐藏/显示和与第一行重叠之间的平滑过渡


我想问一下如何修复表格标题 View 的高度并且不使其重叠
代码

@IBOutlet weak var errorView: UIView!

@IBAction func next(_ sender: Any) {
    let newUserEmail = self.txtfEmail.text
    if isValidEmail(newUserEmail!) {
        performSegue(withIdentifier: "addInventryToNewUser", sender: self)
    }
    else {
        cellemail.layer.borderWidth = 2.0
        cellemail.layer.borderColor = UIColor.red.cgColor

        let f = errorView.frame;      
           errorView.frame = CGRect(x: f.origin.x, y: f.origin.y, width: f.width, height: 21);
        errorView.isHidden = false

        lblError.text = "❌ Invalid email address."
    }

}

Answer 1

您需要应用一些动画来实现平滑过渡。就是这样:

@IBAction func next(_ sender: Any) {
    let newUserEmail = self.txtfEmail.text
    if isValidEmail(newUserEmail!) {
        performSegue(withIdentifier: "addInventryToNewUser", sender: self)
    }
    else {
        cellemail.layer.borderWidth = 2.0
        cellemail.layer.borderColor = UIColor.red.cgColor

        UIView.animate(withDuration: 0.5) {
             self.errorView.frame.size.height = 21
        }
        errorView.isHidden = false

        lblError.text = "❌ Invalid email address."
    }
}