swift中UITextView的使用

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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()  

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// 字体设置  
textview.textAlignment = NSTextAlignment.Left  
textview.textColor = UIColor.redColor()  
textview.font = UIFont(name: "GillSans", size: 15.0)  

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// 光标颜色  
textview.tintColor = UIColor.greenColor()  
          
textview.editable = true  
textview.userInteractionEnabled = true  
textview.scrollEnabled = true  
textview.showsHorizontalScrollIndicator = true  
textview.showsVerticalScrollIndicator = true  

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// 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")  
}  

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// 输入设置  
textview.keyboardType = UIKeyboardType.WebSearch  
textview.returnKeyType = UIReturnKeyType.Done  

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// 自定义输入源控件  
// 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  
// 自定义输入源控件副视图  
let accessoryview = UIView(frame: CGRectMake(0.0, 0.0, CGRectGetWidth(self.view.bounds), 40.0))  
accessoryview.backgroundColor = UIColor.greenColor()  
let accessoryLeft = UIButton(frame: CGRectMake(10.0, 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), 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")  
}  

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// 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))  
            }  
        }  
}  


 




源码：https://github.com/potato512/SYSwiftLearning