前端之家收集整理的这篇文章主要介绍了
swift中UITextView的使用,
前端之家小编觉得挺不错的,现在分享给大家,也给大家做个参考。
let textview = UITextView(frame: CGRectMake(10.0,10.0,(CGRectGetWidth(self.view.bounds) - 10.0 * 2),80.0))
self.view.addSubview(textview)
textview.backgroundColor = UIColor.lightGrayColor()
// 字体设置
textview.textAlignment = NSTextAlignment.Left
textview.textColor = UIColor.redColor()
textview.font = UIFont(name: "GillSans",size: 15.0)
// 光标颜色
textview.tintColor = UIColor.greenColor()
textview.editable = true
textview.userInteractionEnabled = true
textview.scrollEnabled = true
textview.showsHorizontalScrollIndicator = true
textview.showsVerticalScrollIndicator = true
// 代理,注意添加代理协议,及实现代理方法
textview.delegate = self
// 添加协议
class ViewController: UIViewController,UITextViewDelegate {
override func viewDidLoad() {
super.viewDidLoad()
}
}
// 实现代理方法
// MARK: - UITextViewDelegate
func textViewShouldBeginEditing(textView: UITextView) -> Bool {
print("1 textViewShouldBeginEditing")
return true
}
func textViewDidBeginEditing(textView: UITextView) {
print("2 textViewDidBeginEditing")
}
func textViewDidChange(textView: UITextView) {
print("3 textViewDidChange")
}
func textView(textView: UITextView,shouldChangeTextInRange range: NSRange,replacementText text: String) -> Bool {
print("4 textView")
print("text:\(textView.text) length = \(textView.text?.characters.count)")
// 回车时退出编辑
if text == "\n"
{
// textView.endEditing(true)
// 或
// self.view.endEditing(true)
// 或
textView.resignFirstResponder()
return true
}
return true
}
func textViewShouldEndEditing(textView: UITextView) -> Bool {
print("5 textViewShouldEndEditing")
return true
}
func textViewDidEndEditing(textView: UITextView) {
print("6 textViewDidEndEditing")
}
// 输入设置
textview.keyboardType = UIKeyboardType.WebSearch
textview.returnKeyType = UIReturnKeyType.Done
// @R_301_451@输入源控件
// let inputview = UIButton(frame: CGRectMake(0.0,0.0,CGRectGetWidth(self.view.bounds),100.0))
// inputview.setImage(UIImage(named: "normalImage"),forState: UIControlState.Normal)
// inputview.backgroundColor = UIColor.lightGrayColor()
// inputview.addTarget(self,action: Selector("click:"),forControlEvents: UIControlEvents.TouchUpInside)
// textview.inputView = inputview
// @R_301_451@输入源控件副视图
let accessoryview = UIView(frame: CGRectMake(0.0,40.0))
accessoryview.backgroundColor = UIColor.greenColor()
let accessoryLeft = UIButton(frame: CGRectMake(10.0,60.0,20.0))
accessoryview.addSubview(accessoryLeft)
accessoryLeft.setTitle("取消",forState: UIControlState.Normal)
accessoryLeft.backgroundColor = UIColor.orangeColor()
accessoryLeft.addTarget(self,action: Selector("leftClick:"),forControlEvents: UIControlEvents.TouchUpInside)
let accessoryRight = UIButton(frame: CGRectMake((CGRectGetWidth(accessoryview.bounds) - 10.0 - 60.0),20.0))
accessoryview.addSubview(accessoryRight)
accessoryRight.setTitle("确定",forState: UIControlState.Normal)
accessoryRight.backgroundColor = UIColor.orangeColor()
accessoryRight.addTarget(self,action: Selector("rightClick:"),forControlEvents: UIControlEvents.TouchUpInside)
textview.inputAccessoryView = accessoryview
// MARK: - click
func click(button:UIButton)
{
self.view.endEditing(true)
}
// MARK: - left/right click
func leftClick(button:UIButton)
{
print("取消")
}
func rightClick(button:UIButton)
{
self.view.endEditing(true)
print("确定")
}
// 其他
// 第一响应,即进入编辑状态
// textview.becomeFirstResponder()
// 结束响应,即结束编辑
// textview.resignFirstResponder()
// 发通知-输入改变
NSNotificationCenter.defaultCenter().addObserver(self,selector: Selector("textViewEditChanged:"),name: UITextViewTextDidChangeNotification,object: textview)
// MARK: - 通知响应方法
func textViewEditChanged(notification:NSNotification)
{
let textView:UITextView! = notification.object as! UITextView
if (textView != nil)
{
let text:String! = textView.text
let length = text.characters.count
if (length > 200)
{
textView.text = text.substringToIndex(text.startIndex.advancedBy(200))
}
}
}