Question

可能重复：
  Making the view slide up to make room for the keyboard?
  Xcode/iOS5: Move UIView up, when keyboard appears

正如我们通常在文本字段中输入数据键盘一样，它会隐藏数据我们在字段中输入的内容，因此屏幕应该向上滑动以便我们可以看到在fiedl中输入的数据。

Answer 1

试试这段代码.......

 -(void)setViewMovedUp:(BOOL)movedUp
 {
 [UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration:0.3]; // if you want to slide up the view

CGRect rect = self.view.frame;
if (movedUp)
{
    rect.origin.y -= moveKeyboard;
}
else
{
    rect.origin.y += moveKeyboard;
}
self.view.frame = rect;
[UIView commitAnimations];
}

  -(void)keyboardWillShow
 {
// Animate the current view out of the way
if (self.view.frame.origin.y >= 0)
{
    [self setViewMovedUp:YES];
}
else if (self.view.frame.origin.y < 0)
{
    [self setViewMovedUp:NO];
}
 }


 -(void)keyboardWillHide
 {
if (self.view.frame.origin.y >= 0)
{
    [self setViewMovedUp:YES];
}
else if (self.view.frame.origin.y < 0)
{
    [self setViewMovedUp:NO];
}
}


 - (void)viewWillAppear:(BOOL)animated
 {
[super viewWillAppear:animated];
// register for keyboard notifications
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillShow)
                                             name:UIKeyboardWillShowNotification object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillHide)
                                             name:UIKeyboardWillHideNotification object:nil];
 }
 - (void)viewWillDisappear:(BOOL)animated
 {
[super viewWillDisappear:animated];
// unregister for keyboard notifications while not visible.
[[NSNotificationCenter defaultCenter] removeObserver:self name:UIKeyboardWillShowNotification object:nil];
[[NSNotificationCenter defaultCenter] removeObserver:self name:UIKeyboardWillHideNotification object:nil];
 }

编辑：moveKeyboard是浮动的。根据您的需要设定其值。

Answer 2

有通知（UIKeyboard[Will|Did][Show|Hide]Notification）告诉您键盘即将出现或消失，您可以使用它们来触发移动视图的代码。移动视图的方法有多种 - 您可以自己移动视图，根据需要调整位置;你可以将它们全部放在一个视图中，这样你只需要移动容器;或者您可以将它们嵌入滚动视图中，只需调整滚动视图的内容偏移量。

请参阅Apple的文档Managing the Keyboard，特别是名为Moving Content That is Located Under the Keyboard的部分。那里也有示例代码，而且效果很好。

如何在iPhone应用程序中滑动屏幕以查看我们在文本字段中输入的数据

2 个答案: