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June 15, 2017 13:49
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Programatic Constraints
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- (void)setProgramaticConstraints { | |
self.myView = [UIView new]; | |
self.myView.translatesAutoresizingMaskIntoConstraints = NO; | |
[self.myView setBackgroundColor:COLOR_WHITE_SMOKE]; | |
[self.view addSubview:self.myView]; | |
[self.myView addConstraint:[NSLayoutConstraint constraintWithItem:self.myView | |
attribute:NSLayoutAttributeHeight | |
relatedBy:NSLayoutRelationEqual | |
toItem:nil | |
attribute:NSLayoutAttributeNotAnAttribute | |
multiplier:1.0 | |
constant:1.0f]]; | |
NSLayoutConstraint *myViewTopConstraint = [NSLayoutConstraint | |
constraintWithItem:self.myView attribute:NSLayoutAttributeTop | |
relatedBy:NSLayoutRelationEqual toItem:self.view | |
attribute:NSLayoutAttributeBottom multiplier:1.0 constant:0.0f]; | |
NSLayoutConstraint *myViewBottomConstraint = [NSLayoutConstraint | |
constraintWithItem:self.myView attribute:NSLayoutAttributeBottom | |
relatedBy:NSLayoutRelationEqual toItem:self.view | |
attribute:NSLayoutAttributeBottom multiplier:1.0 constant:0.0f]; | |
NSLayoutConstraint *myViewLeadingConstraint = [NSLayoutConstraint | |
constraintWithItem:self.myView attribute:NSLayoutAttributeLeading | |
relatedBy:NSLayoutRelationEqual toItem:self.view | |
attribute:NSLayoutAttributeLeading multiplier:1.0 constant:0.0f]; | |
NSLayoutConstraint *myViewTrailingConstraint = [NSLayoutConstraint | |
constraintWithItem:self.myView attribute:NSLayoutAttributeTrailing | |
relatedBy:NSLayoutRelationEqual toItem:self.view | |
attribute:NSLayoutAttributeTrailing multiplier:1.0 constant:0.0f]; | |
[self.view addConstraints:@[myViewTopConstraint, myViewBottomConstraint, myViewLeadingConstraint, myViewTrailingConstraint]]; | |
} |
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