Question

我可以通过硬编码高度和宽度来更改按钮单击时UIView框架的高度和宽度，但是当我在CGFloat格式的UItext字段中从用户输入时，我无法更改它。

`

 import UIKit

  class SetBorderSizeViewController: UIViewController{

@IBOutlet weak var WidthText: UITextField!
@IBOutlet weak var Height: UITextField!
@IBOutlet weak var View_border: UIView!

override func viewDidLoad() {
    super.viewDidLoad()
    View_border.isHidden = true
}


   //Change UIView Height and width frame  on  "ChangeSizeButton" Button Press.....

@IBAction func ChangeSizeButton(_ sender: Any) {
     View_border.isHidden = false
    View_border.layer.borderWidth = 5
 /// Here i want to get user input from text field...
    View_border.frame.size.height = 20
    View_border.frame.size.width = 80
   }

   }

`

任何人都可以根据我的要求更新我的代码???

Answer 1

试试这个：

@IBAction func ChangeSizeButton(_ sender: Any) {
         View_border.isHidden = false
        View_border.layer.borderWidth = 5
     /// Here i want to get user input from text field...
        View_border.frame.size.height = CGFloat(Float(WidthText.text!)!)
        View_border.frame.size.width = CGFloat(Float(Height.text!)!)
        self.View_border.layoutIfNeeded()
       }

Answer 2

此代码也有效：

class ViewController: UIViewController {

    // MARK: IBOutlets

    @IBOutlet private weak var resizableView: UIView!
    @IBOutlet private weak var widthTextField: UITextField!
    @IBOutlet private weak var heightTextField: UITextField!

    // MARK: IBActions

    @IBAction private func didResizeButtonTapped(_ sender: UIButton) {
        let (newWidth, newHeight) = convertValues()
        resizableView.frame.size.width = newWidth
        resizableView.frame.size.height = newHeight
    }

}

// MARK: Private Methods

private extension ViewController {

    func convertValues() -> (width: CGFloat, height: CGFloat) {
        let width = Float(widthTextField.text ?? "0")
        let height = Float(heightTextField.text ?? "0")
        return (CGFloat(width ?? 0.0), CGFloat(height ?? 0.0))
    }

}

但在我的情况下，我使用约束为我的“resizableView”，所以我的视图每次都无效。在这种情况下，您可以为宽度和高度约束创建参考，并将它们设置为新值，如：

widthConstraint.constant = <your_value>

从UIText字段的用户输入更改UIView框架高度和宽度

2 个答案: