NSLayoutConstrain-将尝试通过打破约束来进行恢复-以编程方式创建约束[重复]

Question

这个问题已经在这里有了答案：

• 无法同时满足约束条件，将尝试通过打破约束条件来恢复 14个答案

它运行正常，除了我收到此错误外，没有什么错。

下面是我的代码。

NSDictionary *views = @{@"container":self.containerView,
                        @"head":self.headImageView,
                        @"userName":self.userNameLabel,
                        @"userTitle":self.userTitleLabel,
                        @"line":self.infoSeparatorLine,
                        @"articleTitle":self.articleTitleLabel
                        };

float headWidthAndHeight = 50;
NSDictionary *metrics = @{@"headWH":@(headWidthAndHeight),
                        @"userLabelWH":@(headWidthAndHeight/2),
                        };

[self.contentView addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"H:|[container]|" options:0 metrics:nil views:views]];
[self.contentView addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"V:|-10-[container]|" options:0 metrics:nil views:views]];


[self.containerView addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"H:|-15-[head(headWH)]-5-[userName]-15-|" options:0 metrics:metrics views:views]];
[self.containerView addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"H:|-15-[head(headWH)]-5-[userTitle]-15-|" options:0 metrics:metrics views:views]];
[self.containerView addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"H:|[line]|" options:0 metrics:metrics views:views]];
[self.containerView addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"H:|-15-[articleTitle]-15-|" options:0 metrics:metrics views:views]];


[self.containerView addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"V:|[head(headWH)]-0-[line(1)]-8-[articleTitle]|" options:0 metrics:metrics views:views]];
[self.containerView addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"V:|[userName(userLabelWH)]-0-[userTitle(userLabelWH)]" options:0 metrics:metrics views:views]];

以下是我在调试区域中收到的错误消息。

我如何解决它？

Answer 1

[self.containerView addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"V:|[head(headWH)]-0-[line(1)]-8@999-[articleTitle]|" options:0 metrics:metrics views:views]];

将优先级更改为低于1000，以打破约束。