用代码：
//3. username/phone number textFiled
let textFieldPaddingX:CGFloat = 10
let textFieldPaddingY:CGFloat = 20
let textFieldHeight:CGFloat = 40
usernameTextField.frame = CGRectMake(
textFieldPaddingX,
appNameLabel.frame.origin.y + appNameLabel.frame.height + 40,//self.view.bounds.height*0.4,
self.view.bounds.width - (textFieldPaddingX * 2),
textFieldHeight)
usernameTextField.textAlignment = NSTextAlignment.Left
usernameTextField.font = UIFont.systemFontOfSize(16)
usernameTextField.borderStyle = UITextBorderStyle.RoundedRect
// usernameTextField.layer.borderWidth = 1
// usernameTextField.layer.cornerRadius = 4
// usernameTextField.layer.borderColor = UIColor.lightGrayColor().CGColor
usernameTextField.placeholder = "请输入用户名（手机号）"
//4. password textFiled
passwordTextField.frame = CGRectMake(
usernameTextField.frame.origin.x,
usernameTextField.frame.origin.y + usernameTextField.frame.height + textFieldPaddingY,
usernameTextField.frame.width,
usernameTextField.frame.height)
passwordTextField.textAlignment = NSTextAlignment.Left
passwordTextField.font = UIFont.systemFontOfSize(16)
passwordTextField.borderStyle = UITextBorderStyle.RoundedRect
passwordTextField.placeholder = "请输入密码"
passwordTextField.secureTextEntry = true已经实现了：
但是没有输入法出现，需要添加输入法。参考：
用代码：
//3. username/phone number textFiled
let textFieldPaddingX:CGFloat = 10
let textFieldPaddingY:CGFloat = 20
let textFieldHeight:CGFloat = 40
usernameTextField.frame = CGRectMake(
textFieldPaddingX,
appNameLabel.frame.origin.y + appNameLabel.frame.height + 40,//self.view.bounds.height*0.4,
self.view.bounds.width - (textFieldPaddingX * 2),
textFieldHeight)
usernameTextField.textAlignment = NSTextAlignment.Left
usernameTextField.font = UIFont.systemFontOfSize(16)
usernameTextField.borderStyle = UITextBorderStyle.RoundedRect
usernameTextField.placeholder = "请输入用户名（手机号）"
usernameTextField.autocorrectionType = UITextAutocorrectionType.No
usernameTextField.keyboardType = UIKeyboardType.Default
usernameTextField.returnKeyType = UIReturnKeyType.Done
usernameTextField.clearButtonMode = UITextFieldViewMode.WhileEditing
usernameTextField.contentVerticalAlignment = UIControlContentVerticalAlignment.Center但是点击进入后，没有出现键盘。
搜：
swift UITextField add keyboard
swift uitextfield keyboard not showing
参考：
果然就解决问题，点击UITextField后出现了键盘：
［总结］
iOS模拟器中，点击文本输入框时，键盘没有显示，是因为：
默认选中了：
iOS 模拟器－》Hardware－》Keyboard－》Connect Hardware Keyboard
使得，此时物理上的电脑键盘起效果，可以输入文字到文本框中
但是iOS 模拟器模拟器出来的iPhone内部不显示键盘了
解决办法是：
取消选择：
iOS 模拟器－》Hardware－》Keyboard－》Connect Hardware Keyboard
这样就可以正常显示出（软）键盘了
转载请注明：在路上 » ［已解决］swift给UITextField添加输入法显示出键盘