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UITextView与底锚iOS的问题

nslayoutconstraint swift ios

Yupi · 技术社区 · 7 年前

我已经为一个聊天应用程序创建了一个输入容器。容器由以下材料制成: UIView UIImageView , UITextView 和 UIButton 都是程序化的。但我的问题是我不能动 UITextView视图 bottomAnchor 不动了 UITextView视图 但是 topAnchor

我试过很多方法,但都不能成功。这是密码和 constraints :

lazy var inputTextField: UITextView = {
    let textField = UITextView()
    textField.text = "Enter message..."
    textField.translatesAutoresizingMaskIntoConstraints = false
    textField.font = UIFont(name: (textField.font?.fontName)!, size: 18)
    textField.layer.borderWidth = 1
    textField.layer.borderColor = UIColor.gray.cgColor
    textField.layer.cornerRadius = 25
    textField.textContainerInset = UIEdgeInsets(top: 15.0, left: 8.0, bottom: 0, right: 8.0)
    textField.delegate = self
    return textField
}()

和约束条件:

        addSubview(self.inputTextField)
    //x,y,w,h
    self.inputTextField.leftAnchor.constraint(equalTo: uploadImageView.rightAnchor, constant: 8).isActive = true
    self.inputTextField.rightAnchor.constraint(equalTo: sendButton.leftAnchor).isActive = true
    self.inputTextField.heightAnchor.constraint(equalTo: heightAnchor).isActive = true
    self.inputTextField.topAnchor.constraint(equalTo: separatorLineView.topAnchor, constant: 5.0).isActive = true

//bottom anchor doesn't work
    self.inputTextField.bottomAnchor.constraint(equalTo: self.bottomAnchor, constant: 5.0)
        .isActive = true

3 回复 | 直到 7 年前

Leonardo Di Nardo 7 年前

试试这个!

self.inputTextField.leftAnchor.constraint(equalTo: uploadImageView.rightAnchor, constant: 8).isActive = true
self.inputTextField.rightAnchor.constraint(equalTo: sendButton.leftAnchor).isActive = true
self.inputTextField.topAnchor.constraint(equalTo: separatorLineView.topAnchor, constant: 5.0).isActive = true
self.inputTextField.bottomAnchor.constraint(equalTo: self.bottomAnchor, constant: 5.0).isActive = true

Vicky_Vignesh 7 年前

从下面的代码来看,它不起作用,因为已经给出了高度限制,所以要么顶部和高度起作用,要么底部和高度起作用。

    addSubview(self.inputTextField)
//x,y,w,h
self.inputTextField.leftAnchor.constraint(equalTo: uploadImageView.rightAnchor, constant: 8).isActive = true
self.inputTextField.rightAnchor.constraint(equalTo: sendButton.leftAnchor).isActive = true
self.inputTextField.heightAnchor.constraint(equalTo: heightAnchor).isActive = true
self.inputTextField.topAnchor.constraint(equalTo: separatorLineView.topAnchor, constant: 5.0).isActive = true

//bottom anchor doesn't work
    self.inputTextField.bottomAnchor.constraint(equalTo: self.bottomAnchor, constant: 5.0)
        .isActive = true

在您的场景中,您应该更改 separatorLineView 隐藏 分隔线视图 bottomConstraints ,只需移动 分隔线视图

希望这对你有帮助!

Abhay Singh 7 年前

let topConstraint = NSLayoutConstraint(item: inputTextField, attribute: NSLayoutAttribute.left, relatedBy: NSLayoutRelation.equal, toItem: separatorLineView, attribute: NSLayoutAttribute.bottom, multiplier: 1, constant: 0)

NSLayoutConstraint.activate([topConstraint])

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