NSLayoutConstraint 使用代码实现约束的添加和删除

来源：互联网发布：linux怎么装vnc 编辑：程序博客网时间：2024/06/05 22:37

- (void)addMasonry:(NSView *)view superView:(NSView *)sView padding:(NSEdgeInsets)padding{

view.translatesAutoresizingMaskIntoConstraints =NO;

NSLayoutConstraint *top = [NSLayoutConstraintconstraintWithItem:view attribute:NSLayoutAttributeToprelatedBy:NSLayoutRelationEqualtoItem:sView attribute:NSLayoutAttributeTopmultiplier:1.0constant:padding.top];

NSLayoutConstraint *bottom = [NSLayoutConstraintconstraintWithItem:view attribute:NSLayoutAttributeBottomrelatedBy:NSLayoutRelationEqualtoItem:sView attribute:NSLayoutAttributeBottommultiplier:1.0constant:padding.bottom];

NSLayoutConstraint *left = [NSLayoutConstraintconstraintWithItem:view attribute:NSLayoutAttributeLeftrelatedBy:NSLayoutRelationEqualtoItem:sView attribute:NSLayoutAttributeLeftmultiplier:1.0constant:padding.left];

NSLayoutConstraint *right = [NSLayoutConstraintconstraintWithItem:view attribute:NSLayoutAttributeRightrelatedBy:NSLayoutRelationEqualtoItem:sView attribute:NSLayoutAttributeRightmultiplier:1.0constant:padding.right];

[sView addConstraint:top];

[sView addConstraint:bottom];

[sView addConstraint:left];

[sView addConstraint:right];

}

- (void)removeMasonry:(NSView *)view superView:(NSView *)sView{

NSArray *arr = [sViewconstraints];

NSMutableArray *marr = [NSMutableArrayarray];

for (NSLayoutConstraint *constranitin arr) {

if(constranit.firstItem == view){

[marr addObject:constranit];

}

[NSLayoutConstraintdeactivateConstraints:marr];

}

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