IOS 8 Keyboard Height and Key Effects

Question

I want to change the height of the keyboard in Xcode 6 Beta 5. I searched the code and found that with the help NSLayoutConstraintwe can change its height, but not work for me.

This is my code:

CGFloat _expandedHeight = 500;
NSLayoutConstraint *_heightConstraint =
[NSLayoutConstraint constraintWithItem: self.view
                             attribute: NSLayoutAttributeHeight
                             relatedBy: NSLayoutRelationEqual
                                toItem: nil
                             attribute: NSLayoutAttributeNotAnAttribute
                            multiplier: 0.0
                              constant: _expandedHeight];
[self.view addConstraint: _heightConstraint];

Answer 1

For this to work, all views added to the UIInputViewController must use layout restrictions, so you cannot add any subheadings that use UIViewAutoresizing masks. If you want to use UIViewAutoresizing, just add a subview as shown below and then add all the other views to that view.

UIView *mainView = [[UIView alloc] initWithFrame:self.view.bounds];

[mainView setTranslatesAutoresizingMaskIntoConstraints:NO];

[self.view addSubview:mainView];

NSLayoutConstraint *widthConstraint = [NSLayoutConstraint constraintWithItem:mainView attribute:NSLayoutAttributeWidth relatedBy:NSLayoutRelationEqual toItem:self.view attribute:NSLayoutAttributeWidth multiplier:1.0 constant:0.0];

NSLayoutConstraint *heightConstraint = [NSLayoutConstraint constraintWithItem:mainView attribute:NSLayoutAttributeHeight relatedBy:NSLayoutRelationEqual toItem:self.view attribute:NSLayoutAttributeHeight multiplier:1.0 constant:0.0];

[self.view addConstraints:@[widthConstraint, heightConstraint]];