Delete Duplicate Simulators

xcrun simctl list devices | grep -v '^[-=]' | cut -d "(" -f2 | cut -d ")" -f1 | xargs -I {} xcrun simctl delete "{}"

Set Constraint

        [ChildView setFrame:ParentView.bounds];

        [ParentView addSubview: ChildView];

        

        [ChildView.centerXAnchor constraintEqualToAnchor: ParentView.centerXAnchor].active = true;

        [ChildView.centerYAnchor constraintEqualToAnchor: ParentView.centerYAnchor].active = true;