iOS UITextField

//**********  UITextField  ****************************************************self.myTextF = [[UITextField alloc]initWithFrame:CGRectMake(100, 100, 200, 40)];self.myTextF.borderStyle = UITextBorderStyleRoundedRect;//     设置  输入框外观self.myTextF.placeholder = @"输入用户名";  //     设置  占位提示语self.myTextF.secureTextEntry = YES;//     设置  密文显示self.myTextF.keyboardType = UIKeyboardTypePhonePad;//     设置  键盘类型self.myTextF.clearButtonMode = UITextFieldViewModeAlways;  //  设置输入框右侧删除按钮self.myTextF.text = @"121212"; //     设置  输入框内容,可写入/可读取self.myTextF.delegate = self;//     协议 回收键盘[self.window addSubview:self.myTextF];[self.myTextF release];// 系统的 签协议回收键盘- (BOOL)textFieldShouldReturn:(UITextField *)textField {    [self.myTextF resignFirstResponder];  //取消第一响应者 ,回收键盘    return YES;}