ios swift 3 - UIAlertController width

问题

Is there anyway to create a custom alertController that fit the width of the screen ?

I tried several things before asking this question one of them is :

let width:NSLayoutConstraint = NSLayoutConstraint(item: alertController.view, attribute: NSLayoutAttribute.width, relatedBy: NSLayoutRelation.equal, toItem: nil, attribute: NSLayoutAttribute.notAnAttribute, multiplier: 1, constant: view.bounds.width )

alertController.view.addConstraint(width)

But this line of code always makes a horizontal space between my alertController and the Screen.

回答1:

Here is what I currently find in the Apple documents:

Appearance of Alert Views: You cannot customize the appearance of alert views.

This disappoints me as I think the message text in alert views is too small for many users. DrPatience, in a comment above, suggests a possible workaround. Alert Views

来源：https://stackoverflow.com/questions/40933616/ios-swift-3-uialertcontroller-width