Swift基础之UITextField

//设置全局变量,将下面的替换即可

//var myTextField = UITextField();

//系统生成的viewDidLoad()方法

override func viewDidLoad() {

super.viewDidLoad()

// Do any additional setup after loading the view, typically from a nib.

//创建局部变量UITextField

let myTextField = UITextField.init(frame: CGRectMake(20, 100, self.view.frame.width-40, 60));

//设置文本

//myTextField.text = "这是一个输入框";

//设置占位符

myTextField.placeholder = "请输入你的内容......";

//设置字体大小

myTextField.font = UIFont.systemFontOfSize(22);

//设置编辑框右侧出现的删除图标

myTextField.clearButtonMode = UITextFieldViewMode.WhileEditing;

//设置边框大小，默认为0

myTextField.layer.borderWidth = 2;

//设置边框颜色，默认为黑色

myTextField.layer.borderColor = UIColor.redColor().CGColor;

//设置圆角

myTextField.layer.cornerRadius = 8;

//设置背景颜色

myTextField.backgroundColor = UIColor.cyanColor();

//设置是否安全显示

//myTextField.secureTextEntry = true;

//设置键盘样式

//myTextField.keyboardType = UIKeyboardType.NumberPad;//纯数字类型

//设置return键类型

/*typedef enum {

UIReturnKeyDefault, 默认 灰色按钮，标有Return

UIReturnKeyGo, 　标有Go的蓝色按钮

UIReturnKeyGoogle,标有Google的蓝色按钮，用语搜索

UIReturnKeyJoin,标有Join的蓝色按钮

UIReturnKeyNext,标有Next的蓝色按钮

UIReturnKeyRoute,标有Route的蓝色按钮

UIReturnKeySearch,标有Search的蓝色按钮

UIReturnKeySend,标有Send的蓝色按钮

UIReturnKeyYahoo,标有Yahoo的蓝色按钮

UIReturnKeyYahoo,标有Yahoo的蓝色按钮

UIReturnKeyEmergencyCall, 紧急呼叫按钮

} UIReturnKeyType;*/

myTextField.returnKeyType = UIReturnKeyType.Search;

//添加左视图或右视图

let leftImgView = UIImageView.init(frame: CGRectMake(0, 0, 60, 60));

leftImgView.image = UIImage(named: "login_pwd.png");

myTextField.leftView = leftImgView;

//设置视图显示的方式,添加视图后必须写

myTextField.leftViewMode = UITextFieldViewMode.Always;

//设置代理

myTextField.delegate = self;

//添加视图

self.view.addSubview(myTextField);

}

//UITextFieldDelegate

func textFieldDidBeginEditing(textField: UITextField) {

print("执行了开始编辑方法。。。。");

}

func textField(textField: UITextField, shouldChangeCharactersInRange range: NSRange, replacementString string: String) -> Bool {

print("执行了编辑框内容被某个值替换了的方法",string);

return true;

}