UITableView和UIView与键盘将显示

Question

我有这个UITableView几乎填充我的整个UIViewController，并且我有一个UIView在底部包含一个按钮和一个文本框。

当我点击文本框时，我想让UIView和tableview向上推，这样UIView就在键盘之上。

- UIView: 
    - UITextField 
    - UIButton 

我已经在这里尝试了多个建议，但似乎没有在我的情况下工作。

Answer 1

一个字：约束。

有我的文章在这里读： Height of iOS onscreen keyboard

它基本上有在屏幕底部的约束，每当用户打开屏幕键盘，它改变了这个constaint的高度。

希望这有助于。

Answer 2

正如评论中提到的，每个@IBOutlet将您的底部约束（您的视图中包含文本字段和按钮的约束）连接到您的视图控制器。收听UIKeyboardWillHideNotification和UIKeyboardWillShowNotification并执行其选择器。当键盘出现时，将底部约束调整为键盘高度，并在隐藏时将其设置回0（或您在其中存储的任何值）。我会在动画中包装调整。

赞（在SWIFT）：

func keyboardWillShow(notification: NSNotification) { 
    var info = notification.userInfo! 
    var keyboardFrame: CGRect = (info[UIKeyboardFrameEndUserInfoKey] as! NSValue).CGRectValue() 
    self.view.layoutIfNeeded() 
    UIView.animateWithDuration(0.25, animations: {() -> Void in 
     self.bottomConstraint.constant = keyboardFrame.size.height 
     self.view.layoutIfNeeded() 
    }) 
} 

func keyboardWillHide(notification: NSNotification) { 
    self.view.layoutIfNeeded() 
    UIView.animateWithDuration(0.25, animations: {() -> Void in 
     self.bottomConstraint.constant = 0 
     self.view.layoutIfNeeded() 
    }) 
} 

Answer 3

步骤1：
制作的UIView

底部约束的出口

步骤2：
添加观察员键盘显示和隐藏，然后改变根据键盘约束恒定身高..

//**In viewDidLoad method** 

    // register for keyboard notifications 
    [[NSNotificationCenter defaultCenter] addObserver:self 
              selector:@selector(keyboardWillShow:) 
               name:UIKeyboardWillShowNotification 
               object:nil]; 
    // register for keyboard notifications 
    [[NSNotificationCenter defaultCenter] addObserver:self 
              selector:@selector(keyboardWillHide:) 
               name:UIKeyboardWillHideNotification 
               object:nil]; 

第3步：
管理约束键盘显示和隐藏通知如下图所示

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

    NSDictionary* userInfo = [notification userInfo]; 

    // get the size of the keyboard 
    CGSize keyboardSize = [[userInfo objectForKey:UIKeyboardFrameBeginUserInfoKey] CGRectValue].size; 

    CGSize keyboardSizeNew = [[userInfo objectForKey:UIKeyboardFrameEndUserInfoKey] CGRectValue].size; 

    [UIView animateWithDuration:0.2 
    animations:^{ 
     _bottomConstraintofView.constant = keyboardSizeNew.height; 
     [self.view layoutIfNeeded]; // Called on parent view 
    }]; 
} 

- (void)keyboardWillHide:(NSNotification *)notification 
{ 
    [UIView animateWithDuration:0.2 
    animations:^{ 
     _bottomConstraintofView.constant = 0; 
     [self.view layoutIfNeeded]; 
    }]; 
} 

---

解决方案在斯威夫特

func keyboardWillShow(notification: NSNotification){ 
    let userInfo:NSDictionary = notification.userInfo! 
    let keyboardSize:CGSize = userInfo.objectForKey(UIKeyboardFrameBeginUserInfoKey)!.CGRectValue().size 

    let keyboardSizeNow:CGSize = userInfo.objectForKey(UIKeyboardFrameEndUserInfoKey)!.CGRectValue().size 

    UIView.animateWithDuration(0.2, animations: {() -> Void in 
     self.bottomConstraintofView.constant = keyboardSizeNow.height 
     self.view.layoutIfNeeded() 
    }) 
} 

func keyboardWillHide(notification: NSNotification){ 
    UIView.animateWithDuration(0.2, animations: {() -> Void in 
     self.bottomConstraintofView.constant = 0 
     self.view.layoutIfNeeded() 
    }) 
}