Centering a view in its superview using Visual Format Language

Question

I just started learning AutoLayout for iOS and had a look at Visual Format Language.

It all works fine except for one thing: I just can\'t get a view to center withi

Answer 1

Add below code and have your button at the center of the screen. Absolutely possible.

[self.view addConstraints:[NSLayoutConstraint
                           constraintsWithVisualFormat:@"H:|-[button]-|"
                           options:NSLayoutFormatAlignAllCenterY
                           metrics:0
                           views:views]];

[self.view addConstraints:[NSLayoutConstraint
                           constraintsWithVisualFormat:@"V:|-[button]-|"
                           options:NSLayoutFormatAlignAllCenterX
                           metrics:0
                           views:views]];