//设置输入框 ---《因为输入框用了get方法，所以第一次调用输入框要用self 调用》；

     self.textlab.frame=CGRectMake(, , , );

     _textlab.layer.borderColor=[UIColor blueColor].CGColor;

     _textlab.layer.borderWidth= 0.5f;

     _textlab.backgroundColor=[UIColor colorWithRed:0.830 green:0.801 blue:0.881 alpha:1.000];

     //添加输入框到视图

     [self.view addSubview:self.textlab];

     //监听键盘，键盘出现

     [[NSNotificationCenter defaultCenter]addObserver:self 
                                               selector:@selector(keyboardwill:) 
                                                   name:UIKeyboardWillShowNotification object:nil];

     //监听键盘隐藏

     [[NSNotificationCenter defaultCenter]addObserver:self 
                                               selector:@selector(keybaordhide:) 
                                                   name:UIKeyboardWillHideNotification object:nil];

     //设置点击手势，当点击空白处，结束编辑，收回键盘

     UITapGestureRecognizer *tapp=[[UITapGestureRecognizer alloc]
                                     initWithTarget:self action:@selector(tapAction:)];

     //开启交互

     self.view.userInteractionEnabled=YES;

     //添加手势到视图

     [self.view addGestureRecognizer:tapp];

 //点击手势方法

 -(void)tapAction:(UITapGestureRecognizer *)sender

 {

     [self.view endEditing:YES];

 }

 //当键盘出现时，调用此方法

 -(void)keyboardwill:(NSNotification *)sender

 {

     //获取键盘高度

     NSDictionary *dict=[sender userInfo];

     NSValue *value=[dict objectForKey:UIKeyboardFrameEndUserInfoKey];

     CGRect keyboardrect = [value CGRectValue];

     int height=keyboardrect.size.height;

     //如果输入框的高度低于键盘出现后的高度，视图就上升；

     if ((_textlab.frame.size.height + _textlab.frame.origin.y)>(self.view.frame.size.height - height))

     {

         self.view.frame = CGRectMake(, -height, self.view.frame.size.width, self.view.frame.size.height);

     }

 }

 //当键盘隐藏时候，视图回到原定

 -(void)keybaordhide:(NSNotification *)sender

 {

      self.view.frame = CGRectMake(, , self.view.frame.size.width, self.view.frame.size.height);

 }

 //输入框的get方法

 -(UITextField *)textlab

 {

     if (_textlab==nil)

     {

         _textlab=[UITextField new];

     }

     return _textlab;

 }

 //开始编辑输入框的时候，软键盘出现，执行此事件

 -(void)textFieldDidBeginEditing:(UITextField *)textlab

 {

     //获取当前输入框的位置信息

     CGRect frame = textlab.frame;

     //获取键盘底部位置与键盘最高点之间的距离，键盘高度256

     int offset = frame.origin.y + frame.size.height - (self.view.frame.size.height - 256.0);

     //设置视图上升的时间

     NSTimeInterval animaTime = 0.30f;

     //字符串随意也行...

     [UIView beginAnimations:@"ResizeForKeyboard" context:nil];

     //添加视图上的上升时间0.3f

     [UIView setAnimationDuration:animaTime];

     //将视图的Y坐标向上移动offset个单位，以使下面腾出地方用于软键盘的显示

     if(offset > )

         self.view.frame = CGRectMake(0.0f, -offset, self.view.frame.size.width, self.view.frame.size.height);

     //提交动画

     [UIView commitAnimations];

 }

//当用户按下return键或者按回车键，keyboard消失

-(BOOL)textFieldShouldReturn:(UITextField *)textField

{

    //收回键盘第一响应者意思...

    [textField resignFirstResponder];

    return YES;

}

//输入框编辑完成以后，将视图恢复到原始状态

-(void)textFieldDidEndEditing:(UITextField *)textField

{

    self.view.frame =CGRectMake(, , self.view.frame.size.width, self.view.frame.size.height);

}