我有TextView的地方,用户可以写的东西和标签中的TextView显示的字符数。这是我创造我的TextView和标签
var messageTextView: UITextView = {
let textView = UITextView()
return textView
}()
var messageTextViewTextCounterLabel: UILabel = {
let label = UILabel()
return label
}()
我有功能设置我的标签和UITextView的。
let guide = self.view.safeAreaLayoutGuide
messageTextView.text = "Write something..:"
messageTextView.delegate = self
self.view.addSubview(messageTextView)
messageTextView.translatesAutoresizingMaskIntoConstraints = false
messageTextView.leadingAnchor.constraint(equalTo: guide.leadingAnchor, constant: 20).isActive = true
messageTextView.trailingAnchor.constraint(equalTo: guide.trailingAnchor, constant: -20).isActive = true
messageTextView.topAnchor.constraint(equalTo: guide.topAnchor, constant: 0).isActive = true
messageTextView.bottomAnchor.constraint(equalTo: guide.bottomAnchor, constant: -20).isActive = true
messageTextViewTextCounterLabel.text = "0/800"
self.messageTextView.addSubview(messageTextViewTextCounterLabel)
messageTextViewTextCounterLabel.translatesAutoresizingMaskIntoConstraints = false
messageTextViewTextCounterLabel.trailingAnchor.constraint(equalTo: messageTextView.leadingAnchor, constant: 0).isActive = true
messageTextViewTextCounterLabel.bottomAnchor.constraint(equalTo: messageTextView.bottomAnchor, constant: 0).isActive = true
messageTextViewTextCounterLabel.heightAnchor.constraint(equalToConstant: 15).isActive = true
我在我的标签位置是我的TextView里面。我想这是在右下角,但标签出现在我的TextView文本的右下角。 [
我怎样才能把我的标签内的TextView是在右下角? (文不右下)
messageTextViewTextCounterLabel.trailingAnchor.constraint(equalTo: messageTextView.leadingAnchor, constant: 0).isActive = true
它应该等于messageTextView. trailingAnchor
。
import UIKit
class ViewController: UIViewController {
@IBOutlet var messageTextViewTextCounterLabel:UILabel!
@IBOutlet var messageTextField:UITextField!
@IBOutlet var messageTextView:UITextView!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional
self.messageTextField.delegate = self
self.messageTextView.delegate = self
}
}
的UITextField
extension ViewController:UITextFieldDelegate {
//TextField Delegate Methods
func textFieldShouldReturn(_ textField: UITextField) -> Bool {
textField.resignFirstResponder()
return true
}
func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {
if(textField == messageTextField){
//Check TextField Lenth
let newLength = textField.text!.count + string.count - range.length
//Bind Lenth in label 8/800
messageTextViewTextCounterLabel.text = "\(newLength)/800"
return newLength <= 800
}
return true
}
//的UITextView
extension ViewController:UITextViewDelegate {
//TextField Delegate Methods
func textViewShouldReturn(_ textField: UITextField) -> Bool {
textField.resignFirstResponder()
return true
}
func textView(_ textView: UITextView, shouldChangeTextIn range: NSRange, replacementText text: String) -> Bool {
if(textView == messageTextView){
let newLength = textView.text!.count + text.count - range.length
messageTextViewTextCounterLabel.text = "\(newLength)/800"
return newLength <= 800
}
return true
}
您可以通过给同一trailing
和bottom
约束标签以及解决这一问题。
messageTextViewTextCounterLabel.trailingAnchor.constraint
(equalTo: guide.trailingAnchor, constant: -20).isActive = true
messageTextViewTextCounterLabel.bottomAnchor.constraint
(equalTo: guide.bottomAnchor, constant: -20).isActive = true
我变了
self.messageTextView.addSubview(messageTextViewTextCounterLabel)
至
self.view.addSubview(messageTextViewTextCounterLabel)
但也有其他的解决办法。取而代之的约束等于messageTextView的,我们可以把它改成self.view.safeAreaLayoutGuide.trailingAnchor / bottomAnchor
@ilqarilyasov。解:
messageTextViewTextCounterLabel.trailingAnchor.constraint
(equalTo: guide.trailingAnchor, constant: -20).isActive = true
messageTextViewTextCounterLabel.bottomAnchor.constraint
(equalTo: guide.bottomAnchor, constant: -20).isActive = true