iOS NSLayoutConstraint Fixed Width using constraintWithItem

Question

I\'d like to set a constraint to give a UIButton a fixed (constant) width programmatically. I know I can do this with constraintsWithVisualFormat, but I\'ve been using constrain

Answer 1

Here's a simple code for button with fixed width.

visual format:-

[self.view addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"H:     [myButton(==50)]" options:0 metrics:nil views:NSDictionaryOfVariableBindings(myButton)]];

Use this code for constraint using visual format where self.view is your button's superview and myButton is name of your button and 50 is the width of myButton. You can change these values according to get the desired constraint.

constraintWithItem format:-

[self.view addConstraint:[NSLayoutConstraint constraintWithItem:myButton attribute: NSLayoutAttributeWidth relatedBy:NSLayoutRelationEqual toItem:nil attribute: NSLayoutAttributeNotAnAttribute multiplier:1.0 constant:50.0]];

Use this code for constraint using constraintWithItem format where self.view is your button's superview and myButton is name of your button and 50 is the width of myButton. You can change these values according to get the desired constraint.