在SDCAlertView中添加约束

我正在使用pod SDCAlertView，我需要在我的内容视图中添加一个imageView +一个textField，但是我的约束有问题，下面是我的代码。

let imageView = UIImageView(frame: CGRectMake(0, 0, 100, 100)) imageView.image = UIImage(named: "kalafina") imageView.contentMode = .ScaleAspectFill let alert = AlertController(title: "Testing", message: "1234") imageView.translatesAutoresizingMaskIntoConstraints = false alert.contentView.addSubview(imageView) let imageHeightConstraint = NSLayoutConstraint(item: imageView, attribute: .Height, relatedBy: .Equal, toItem: nil, attribute: .NotAnAttribute, multiplier: 1.0, constant: 100) let imageWidthConstraint = NSLayoutConstraint(item: imageView, attribute: .Width, relatedBy: .Equal, toItem: nil, attribute: .NotAnAttribute, multiplier: 1.0, constant: 100) let imageCenterXConstraint = NSLayoutConstraint(item: imageView, attribute: .CenterX, relatedBy: .Equal, toItem: alert.contentView, attribute: .CenterX, multiplier: 1.0, constant: 0.0) let imageTopConstraint = NSLayoutConstraint(item: imageView, attribute: .Top, relatedBy: .Equal, toItem: alert.contentView, attribute: .Top, multiplier: 1.0, constant: 0) let imageBottomConstraint = NSLayoutConstraint(item: imageView, attribute: .Bottom, relatedBy: .Equal, toItem: alert.contentView, attribute: .Bottom, multiplier: 1.0, constant: 0) alert.view.addConstraint(imageTopConstraint) alert.view.addConstraint(imageBottomConstraint) alert.view.addConstraint(imageHeightConstraint) alert.view.addConstraint(imageWidthConstraint) alert.view.addConstraint(imageCenterXConstraint) alert.addAction(AlertAction(title: "Cancel", style: .Preferred)) alert.addAction(AlertAction(title: "Ok", style: .Default, handler: { action in print("Sending") })) alert.present() 

这是我的结果

Answer 1

您正在将约束添加到alert.view ，但您应该将它们添加到alert.contentView 。 如果你这样做，一切都按预期工作。