我有一个 View Controller ,其中包含两个 TextView (storyTitle 和storyDescription)。我已向两个 TextView 添加了占位符,下面的代码将向您展示我是如何做到这一点的:
// Setup the story title text field
func setupStoryTitleTextView() {
storyTitle.textColor = .gray
storyTitle.text = "Add story title"
storyTitle.textContainerInset = UIEdgeInsets(top: 10, left: 20, bottom: 10, right: 20)
self.storyTitle.delegate = self
view.addSubview(storyTitle)
}
// Setup the storyDescription text view
func setupStoryDescriptionTextView() {
storyDescription.text = "Description of the story"
storyDescription.textColor = .gray
storyDescription.textContainerInset = UIEdgeInsets(top: 10, left: 20, bottom: 300, right: 20)
self.storyDescription.delegate = self
view.addSubview(storyDescription)
}
// To remove placeholder text when the user starts typing
func textViewDidBeginEditing(_ textView: UITextView) {
// Story title text view
if storyTitle.textColor == .gray {
storyTitle.text = nil
storyTitle.textColor = .black
}
// Story description text view
if storyDescription.textColor == .gray {
storyDescription.text = nil
storyDescription.textColor = .black
}
}
// To bring the placeholder back when the text views don't contain any text
func textViewDidEndEditing(_ textView: UITextView) {
// Story title text view
if storyTitle.text.isEmpty {
storyTitle.text = "Add story title"
storyTitle.textColor = .gray
}
// Story description text view
if storyDescription.text.isEmpty {
storyDescription.text = "Description of the story"
storyDescription.textColor = .gray
}
}
这里发生的情况是,当我点击一个 TextView 时,两个 TextView 中的占位符都会消失,这是因为 textViewDidBeginEditing
下的两个 if 条件都被执行了。我怎样才能防止这种情况发生?感谢任何形式的帮助,谢谢:)
最佳答案
您可以通过为 View 对象(您的 TextView )分配标签来轻松完成此操作。使用 textview.tag = [某个数字] 分配标签,然后您还可以向条件中添加类似的内容:
storyDescription.tag = 1
func textViewDidBeginEditing(_ textView: UITextView) {
if textView.tag == 1 && storyTitle.textColor == .gray {
storyTitle.text = nil
storyTitle.textColor = .black
}
}
这与其他 TextView 类似
关于ios - 如何在一个 View Controller 中快速将占位符设置为多个 TextView ,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/56940430/