TextView 大写前两个字符而不是一个
TextView capitalizes first two characters instead of one
所以我在 UITextView 中添加了占位符功能,现在它将输入文本的前两个字符大写,而不是它应该的一个。
如果你们能以任何方式帮助解决这个问题,我将不胜感激。我一直在努力,但我似乎一无所获。
代码如下:
class ViewController: UIViewController {
@IBOutlet weak var textView: UITextView!
override func viewDidLoad() {
super.viewDidLoad()
textView.delegate = self
textView.text = "Type something"
textView.textColor = UIColor.rgb(197, 197, 199)
}
}
extension ViewController: UITextViewDelegate {
// Put cursor at the beginning of TextView when editing begins
func textViewDidBeginEditing(_ textView: UITextView) {
textView.selectedTextRange = textView.textRange(from: textView.beginningOfDocument, to: textView.beginningOfDocument)
}
func textView(_ textView: UITextView, shouldChangeTextIn range: NSRange, replacementText text: String) -> Bool {
// Sets placeholder for UITextView
let updatedText = (textView.text as NSString).replacingCharacters(in: range, with: text)
if updatedText.isEmpty {
textView.text = "Type something"
textView.textColor = UIColor.rgb(197, 197, 199)
textView.selectedTextRange = textView.textRange(from: textView.beginningOfDocument, to: textView.beginningOfDocument)
} else if textView.textColor == UIColor.rgb(197, 197, 199) && !text.isEmpty {
textView.textColor = UIColor.black
textView.text = text
} else {
return true
}
return false
}
// Prevents selecting the placeholder
func textViewDidChangeSelection(_ textView: UITextView) {
if self.view.window != nil {
if textView.textColor == UIColor.rgb(197, 197, 199) {
textView.selectedTextRange = textView.textRange(from: textView.beginningOfDocument, to: textView.beginningOfDocument)
}
}
}
}
谢谢!
下面的代码解决了文本视图中前 2 个字母的大写问题。
func textViewDidChange(_ textView: UITextView) {
if textView.text.isEmpty {
textView.text = "Type something"
textView.textColor = self.placeholderTextColor
} else {
textView.textColor = .black
}
}
func textView(_ textView: UITextView, shouldChangeTextIn range: NSRange, replacementText text: String) -> Bool {
if text.isEmpty {
let updatedText = (textView.text as NSString).replacingCharacters(in: range, with: text)
if updatedText.isEmpty {
textView.text = "Type something"
textView.textColor = self.placeholderTextColor
textView.selectedRange = NSRange(location: 0, length: 0)
}
} else {
if textView.text == "Type something" {
textView.text = ""
}
textView.textColor = .black
}
return true
}
文本视图在文本视图中将前 2 个字符大写的原因是您在下面的委托方法
中返回了 false
func textView(_ textView: UITextView, shouldChangeTextIn range: NSRange, replacementText text: String) -> Bool
所以我在 UITextView 中添加了占位符功能,现在它将输入文本的前两个字符大写,而不是它应该的一个。
如果你们能以任何方式帮助解决这个问题,我将不胜感激。我一直在努力,但我似乎一无所获。
代码如下:
class ViewController: UIViewController {
@IBOutlet weak var textView: UITextView!
override func viewDidLoad() {
super.viewDidLoad()
textView.delegate = self
textView.text = "Type something"
textView.textColor = UIColor.rgb(197, 197, 199)
}
}
extension ViewController: UITextViewDelegate {
// Put cursor at the beginning of TextView when editing begins
func textViewDidBeginEditing(_ textView: UITextView) {
textView.selectedTextRange = textView.textRange(from: textView.beginningOfDocument, to: textView.beginningOfDocument)
}
func textView(_ textView: UITextView, shouldChangeTextIn range: NSRange, replacementText text: String) -> Bool {
// Sets placeholder for UITextView
let updatedText = (textView.text as NSString).replacingCharacters(in: range, with: text)
if updatedText.isEmpty {
textView.text = "Type something"
textView.textColor = UIColor.rgb(197, 197, 199)
textView.selectedTextRange = textView.textRange(from: textView.beginningOfDocument, to: textView.beginningOfDocument)
} else if textView.textColor == UIColor.rgb(197, 197, 199) && !text.isEmpty {
textView.textColor = UIColor.black
textView.text = text
} else {
return true
}
return false
}
// Prevents selecting the placeholder
func textViewDidChangeSelection(_ textView: UITextView) {
if self.view.window != nil {
if textView.textColor == UIColor.rgb(197, 197, 199) {
textView.selectedTextRange = textView.textRange(from: textView.beginningOfDocument, to: textView.beginningOfDocument)
}
}
}
}
谢谢!
下面的代码解决了文本视图中前 2 个字母的大写问题。
func textViewDidChange(_ textView: UITextView) {
if textView.text.isEmpty {
textView.text = "Type something"
textView.textColor = self.placeholderTextColor
} else {
textView.textColor = .black
}
}
func textView(_ textView: UITextView, shouldChangeTextIn range: NSRange, replacementText text: String) -> Bool {
if text.isEmpty {
let updatedText = (textView.text as NSString).replacingCharacters(in: range, with: text)
if updatedText.isEmpty {
textView.text = "Type something"
textView.textColor = self.placeholderTextColor
textView.selectedRange = NSRange(location: 0, length: 0)
}
} else {
if textView.text == "Type something" {
textView.text = ""
}
textView.textColor = .black
}
return true
}
文本视图在文本视图中将前 2 个字符大写的原因是您在下面的委托方法
中返回了 falsefunc textView(_ textView: UITextView, shouldChangeTextIn range: NSRange, replacementText text: String) -> Bool