IOS deletes AutoLayout

IOS deletes AutoLayout

Sometimes, we need to dynamically change a value in AutoLayout in the View, such as moving the x value or y value. What should we do?

 

 

ZLLayoutConstraint is used as the alias NSLayoutConstraint.

Typedef NSLayoutConstraint ZLLayoutConstraint;

---------------

Delete all constraints

 

#pragma mark - remove view to superView autoLayout- (void)removeAllAutoLayout{    [self removeConstraints:self.constraints];    for (ZLLayoutConstraint *constraint in self.superview.constraints) {        if ([constraint.firstItem isEqual:self]) {            [self.superview removeConstraint:constraint];        }    }}

---------------

 

Delete a single constraint

 

#pragma mark - remove single constraint- (void)removeAutoLayout:(ZLLayoutConstraint *)constraint{    for (ZLLayoutConstraint *constraint in self.superview.constraints) {        if ([constraint isEqual:constraint]) {            [self.superview removeConstraint:constraint];        }    }}

 

 

---------------

Delete multiple constraints

 

#pragma mark - remove constraints www.bkjia.com- (void)removeAutoLayoutConstraints:(NSArray *)constraints{    for (ZLLayoutConstraint *constraint in constraints) {        for (ZLLayoutConstraint *superViewConstraint in self.superview.constraints) {            if ([superViewConstraint isEqual:constraint]) {                [self.superview removeConstraint:constraint];            }        }    }}