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December 22, 2015 17:09
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| UIButton *button = ...; | |
| UIView *superview = ...; | |
| NSLayoutConstraint *cn = [NSLayoutConstraint constraintWithItem:button | |
| attribute:NSLayoutAttributeCenterX | |
| relatedBy:NSLayoutRelationEqual | |
| toItem:superview | |
| attribute:NSLayoutAttributeCenterX | |
| multiplier:1.0 | |
| constant:0.0]; | |
| [superview addConstraint:cn]; | |
| cn = [NSLayoutConstraint constraintWithItem:button | |
| attribute:NSLayoutAttributeBottom | |
| relatedBy:NSLayoutRelationEqual | |
| toItem:superview | |
| attribute:NSLayoutAttributeBottom | |
| multiplier:1.0 | |
| constant:-20.0]; | |
| [superview addConstraint:cn]; |
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