import UIKit

class ViewController: UIViewController        ,UITextFieldDelegate,UITextViewDelegate,UIActionSheet  Delegate,UIAlertViewDelegate{
override func viewDidLoad() {
    super.viewDidLoad()
    
   let textField:UITextField = UITextField(frame: CGRectMake(10,120,200,30))
    
    textField.borderStyle = UITextBorderStyle.RoundedRect
    
    textField.placeholder = "請輸入用戶名"
    
    //文字大小超過文本框長度時自動縮小字號，而不是隱藏顯示省略號
    textField.adjustsFontSizeToFitWidth = true//當文字超出文本框寬度時，自動調整文字大小
    textField.minimumFontSize = 14//最小可縮小的字號
    
    textField.textAlignment = NSTextAlignment.Right
    
// textField.co  ntentVerticalAlignment = .Bottom
    textField.delegate = self;
    
    self.view.addSubview(textField)
    
//textField.borderStyle = .None
    
//textField.background = UIImage(named: "lalala")
    textField.clearButtonMode = UITextFieldViewMode.Always
   
    
    textField.returnKeyType = UIReturnKeyType.Done
 }



func textFieldShouldReturn(textField:UITextField) ->Bool {
    //使文本框在界面打開時就獲取焦點，并彈出輸入鍵盤
    textField.resignFirstResponder()
    
    print(textField.text)
    return true
}
}