线程1:AppDelegate类上的SIGBART信号

Question

我最近更新iOS后开始得到这个错误。我认为这与我的约束格式有关，但我不明白。这是我的错误信息

由于未捕获异常'NSInvalidLayoutConstraintException'而终止应用程序，原因:'约束不正确地关联不兼容类型的锚:'

这是一些约束代码

// Bottom constraint: description
    addConstraint(NSLayoutConstraint (item: descriptionTextView, attribute: .bottom, relatedBy: .equal, toItem: itemImageView, attribute: .bottom, multiplier: 1, constant: 0))
    //right constraint: description
    addConstraint(NSLayoutConstraint(item: descriptionTextView, attribute: .right, relatedBy: .equal, toItem: itemImageView, attribute: .bottom, multiplier: 1, constant: 160))
    //left constraint: description
    addConstraint(NSLayoutConstraint(item: descriptionTextView, attribute: .left, relatedBy: .equal , toItem: itemImageView, attribute: .right, multiplier: 1, constant: 8))
    //height constraint: description
    addConstraint(NSLayoutConstraint(item: descriptionTextView, attribute: .height, relatedBy: .equal, toItem: self, attribute: .height, multiplier: 0, constant: 100))

如何解决线程1:信号SIGBART崩溃?

Answer 1

在最后一个addConstraint: toItem: self -> self.view

addConstraint( NSLayoutConstraint(item: descriptionTextView, attribute: NSLayoutAttribute.height, relatedBy: NSLayoutRelation.equal , toItem: self.view, attribute: NSLayoutAttribute.height, multiplier: 0, constant: 100))