键盘显示时移动子视图

时间：2013-10-28 07:41:40

标签： ios iphone objective-c

我正在尝试使用子视图显示评论列表。我将subview添加到self.view，然后我添加了一个tableview以显示注释列表。现在我想让用户添加评论，我试图将另一个子视图添加到屏幕底部的文本字段和按钮的第一个子视图，但现在我想在键盘显示然后再返回时将此视图向上移动在提交评论时，我尝试在textfieldBeginEditing时改变commentView框架，但它没有改变！我的方式不起作用，你有任何想法做我想要的吗？

感谢

这就是我正在做的事情，称为myview的观点是我想要提升的：

CGRect screenRect = [[UIScreen mainScreen] bounds];
CGFloat screenWidth = screenRect.size.width;
CGFloat screenHeight = screenRect.size.height;

// notification button
myView = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, screenWidth,screenHeight)];
[myView setBackgroundColor:[UIColor whiteColor]];
[myView setTag:2013];

commentView = [[UIView alloc] initWithFrame:CGRectMake(0,screenHeight-70,screenWidth,70)];
[commentView setBackgroundColor:[UIColor redColor]];
// [commentView viewWithTag:2031];

table = [[UITableView alloc] initWithFrame:CGRectMake(0,50, screenWidth, screenHeight-100)];;
table.dataSource=self;
table.delegate=self;

UILabel *currentdate = [[UILabel alloc]  initWithFrame:CGRectMake(0,10,screenWidth-40,50)];
currentdate.backgroundColor = [UIColor clearColor];
[currentdate setTextColor: [UIColor blueColor]];
[currentdate setText:@"Comments"];
currentdate.textAlignment= UITextAlignmentCenter;
currentdate.font = [UIFont fontWithName:@"Helvetica" size:20.0];


commentFeild = [[UITextField alloc]  initWithFrame:CGRectMake(60,10,screenWidth-60,30)];

commentFeild.placeholder=@"add comment";
commentFeild.backgroundColor = [UIColor whiteColor];
[commentFeild setTextColor: [UIColor blueColor]];
commentFeild.textAlignment= UITextAlignmentRight;
commentFeild.font = [UIFont fontWithName:@"Helvetica" size:15.0];
[commentFeild.layer setCornerRadius:14.0f];
[commentFeild setTag:2113];
//[commentFeild setDelegate:self];

UIButton *doneBtn=[UIButton buttonWithType:UIButtonTypeRoundedRect];
doneBtn.frame = CGRectMake(screenWidth-45, 10,40, 30);
doneBtn.backgroundColor = [ UIColor clearColor];
[doneBtn setTitle:@"done" forState:UIControlStateNormal];
[doneBtn setTitleColor:[UIColor blueColor] forState:UIControlStateNormal];
[doneBtn addTarget:self action:@selector(hide) forControlEvents:UIControlEventTouchUpInside];

UIButton *add=[UIButton buttonWithType:UIButtonTypeRoundedRect];
add.frame = CGRectMake(5,10,50,30);
add.backgroundColor = [ UIColor clearColor];
[add setTitle:@"add" forState:UIControlStateNormal];
[add setTitleColor:[UIColor blueColor] forState:UIControlStateNormal];
[add addTarget:self action:@selector(addComment) forControlEvents:UIControlEventTouchUpInside];

if(![taskObject.status isEqualToString:@"doneTask"])
{
    [commentView addSubview:commentFeild];
    [commentView addSubview:add];
}

[myView addSubview:doneBtn];
[myView addSubview:currentdate];
[myView addSubview:table];
[myView addSubview:commentView];

[self.view addSubview:myView];

3 个答案:

答案 0 :(得分：2)

当键盘出现并消失时，你需要使用通知

在viewDidLoad方法中

添加此内容 

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


上面的方法在键盘出现时被触发并消失使用它来调整你的tableview

for exaple 

  -(void)keyboardDidShow:(NSNotification *)notification
  {
      NSLog(@"KeyBoard appeared");
      NSDictionary *info=[notification userInfo];
      NSValue *aValue=[info objectForKey:UIKeyboardFrameEndUserInfoKey];

      CGRect keyBoardRect=[aValue CGRectValue];
      keyBoardRect=[self.view convertRect:keyBoardRect fromView:nil];
      CGFloat keyBoardTop=keyBoardRect.origin.y; //i am getting the height of the keyboard

      self.aTableView.contentInset=UIEdgeInsetsMake(0, 0, keyBoardTop+50, 0); //adjust the height by setting the "contentInset"


  }


当键盘消失的时候，这样做


  -(void)keyboardDidDisappear:(NSNotification *)notification
    {
       NSLog(@"KeyBoard Disappeared");

       [UIView beginAnimations:nil context:NULL];
       [UIView setAnimationDuration:0.2];
       self.addContactTableView.contentInset=UIEdgeInsetsMake(10, 0, 10, 0); //set to normal by setting the "contentInset" 

       [UIView commitAnimations];

    }


这方面的一点工作可能会达到你的要求

希望这有助于你：）

答案 1 :(得分：1)

我认为你应该通过doc

答案 2 :(得分：0)

我以为你想移动tableview，听到你的代码修改了一个


       @interface ViewController (  <UITableViewDataSource,UITableViewDelegate,UITextFieldDelegate>
     {
        BOOL KeyboardShown;
     }

     @end

     @implementation ViewController

    - (void)viewDidLoad
    {
     [super viewDidLoad];
     KeyboardShown = NO;

// Do any additional setup after loading the view, typically from a nib.
     CGRect screenRect = [[UIScreen mainScreen] bounds];
     CGFloat screenWidth = screenRect.size.width;
     CGFloat screenHeight = screenRect.size.height;

// notification button

    UIView *myView,*commentView;

    myView = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, screenWidth,screenHeight)];
    [myView setBackgroundColor:[UIColor whiteColor]];
    [myView setTag:2013];

   commentView = [[UIView alloc] initWithFrame:CGRectMake(0,screenHeight-70,screenWidth,70)];
   [commentView setBackgroundColor:[UIColor redColor]];
// [commentView viewWithTag:2031];

    UITableView *table;
    table = [[UITableView alloc] initWithFrame:CGRectMake(0,50, screenWidth, screenHeight-100)];;
   table.dataSource=self;
   table.delegate=self;
   table.tag = 12345;

    UILabel *currentdate = [[UILabel alloc]  initWithFrame:CGRectMake(0,10,screenWidth-40,50)];
    currentdate.backgroundColor = [UIColor clearColor];
    [currentdate setTextColor: [UIColor blueColor]];
    [currentdate setText:@"Comments"];
    currentdate.textAlignment= NSTextAlignmentCenter;
    currentdate.font = [UIFont fontWithName:@"Helvetica" size:20.0];


     UITextField *commentFeild = [[UITextField alloc] initWithFrame:CGRectMake(60,10,screenWidth-60,30)];

    commentFeild.placeholder=@"add comment";
    commentFeild.backgroundColor = [UIColor whiteColor];
    [commentFeild setTextColor: [UIColor blueColor]];
    commentFeild.textAlignment= NSTextAlignmentRight;
   commentFeild.font = [UIFont fontWithName:@"Helvetica" size:15.0];
   [commentFeild.layer setCornerRadius:14.0f];
   [commentFeild setTag:2113];
   commentFeild.delegate = self;
    //[commentFeild setDelegate:self];

   UIButton *doneBtn=[UIButton buttonWithType:UIButtonTypeRoundedRect];
   doneBtn.frame = CGRectMake(screenWidth-45, 10,40, 30);
   doneBtn.backgroundColor = [ UIColor clearColor];
   [doneBtn setTitle:@"done" forState:UIControlStateNormal];
   [doneBtn setTitleColor:[UIColor blueColor] forState:UIControlStateNormal];
   [doneBtn addTarget:self action:@selector(hide) forControlEvents:UIControlEventTouchUpInside];

   UIButton *add=[UIButton buttonWithType:UIButtonTypeRoundedRect];
   add.frame = CGRectMake(5,10,50,30);
   add.backgroundColor = [ UIColor clearColor];
   [add setTitle:@"add" forState:UIControlStateNormal];
   [add setTitleColor:[UIColor blueColor] forState:UIControlStateNormal];
   [add addTarget:self action:@selector(addComment)      forControlEvents:UIControlEventTouchUpInside];


     //    if(![taskObject.status isEqualToString:@"doneTask"])
     //    {
     //        [commentView addSubview:commentFeild];
     //        [commentView addSubview:add];
     //    }

[myView addSubview:doneBtn];
[myView addSubview:currentdate];
[myView addSubview:table];
[myView addSubview:commentView];
[commentView addSubview:commentFeild];
[self.view addSubview:myView];

}

  - (void)viewDidAppear:(BOOL)animated
   {
        [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardDidShow:) name:UIKeyboardWillShowNotification object:nil];
        [[NSNotificationCenter defaultCenter]addObserver:self  selector:@selector(keyboardDidDisappear:) name:UIKeyboardDidHideNotification object:nil];
  }

  - (void)viewDidDisappear:(BOOL)animated
   {
         [[NSNotificationCenter defaultCenter] removeObserver:self name:UIKeyboardWillShowNotification object:nil];
        [[NSNotificationCenter defaultCenter] removeObserver:self name:UIKeyboardDidHideNotification object:nil];
   }





 - (void)didReceiveMemoryWarning
  {
      [super didReceiveMemoryWarning];
     // Dispose of any resources that can be recreated.
   }

 - (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
    {
      return 1;
    }
   -(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
    {
       return 5;
    }

     -(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
       {
        UITableViewCell *cell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:@"cell"];

       cell.textLabel.text = @"hello";
       return cell;


   }

    - (void)keyboardDidShow:(NSNotification *)notification
     {
        //UIView *containerView = [self.view viewWithTag:2013]; comment this and get tableview by TAG
       UITableView *tableView = (UITableView *)[self.view viewWithTag:12345];
       UIView *commentView = [self.view viewWithTag:1000];//i changed the tag and see u missed the tag for this view in viewDisLoad method check it once


     if(!KeyboardShown)
     {
        KeyboardShown = YES;
         NSLog(@"KeyBoard appeared");
        NSDictionary *info=[notification userInfo];
        NSValue *aValue=[info objectForKey:UIKeyboardFrameEndUserInfoKey];

        CGRect keyBoardRect=[aValue CGRectValue];
        keyBoardRect=[self.view convertRect:keyBoardRect fromView:nil];
        CGFloat keyBoardTop=keyBoardRect.origin.y; //i am getting the height of the keyboard


        CGRect commentViewRect = commentView.frame;
         commentViewRect.origin.y = keyBoardTop - 70; //it is the height of comment view

        CGRect tableRect = tableView.frame;
        tableRect.size.height = tableRect.size.height - keyBoardTop + 77;//adjust the height



       [UIView animateWithDuration:0.2 animations:^{
       tableView.frame = tableRect;
       commentView.frame = commentViewRect;

   }];



   }


 }




    - (void)keyboardDidDisappear:(NSNotification *)notification
    {

     // UIView *containerView = [self.view viewWithTag:2013]; //comment this
     //dong same as above , ressetting the same as above
     CGRect screenRect = [[UIScreen mainScreen] bounds];
     CGFloat screenWidth = screenRect.size.width;
     CGFloat screenHeight = screenRect.size.height;

    UITableView *tableView = (UITableView *)[self.view viewWithTag:12345];
    UIView *commentView = [self.view viewWithTag:1000];

    if(KeyboardShown)
    {
       KeyboardShown = NO;
       CGRect tableRect =CGRectMake(0,50, screenWidth, screenHeight-100);
       CGRect commentViewRect = CGRectMake(0,screenHeight-70,screenWidth,70);


        [UIView animateWithDuration:0.2 animations:^{
        tableView.frame = tableRect;
        commentView.frame = commentViewRect;

      }];
    }
   }









 - (BOOL)textFieldShouldReturn:(UITextField *)textField
   {
      [textField resignFirstResponder];
      return YES;
   }

@end


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