CODEWITHSUNDEEP
iosswiftxcode
Makoren
Makoren

Reputation: 341

How do you get the safe area coordinates of a view programmatically in iOS 14?

Put simply, I want to get the bounds of this blue rectangle using Swift code:

enter image description here

The coordinates of this rectangle are visible in the Size inspector:

enter image description here

In an empty App project in Xcode, I've tried using view.safeAreaLayoutGuide.layoutFrame to get the CGRect, but this property seems to contain the bounds of the entire view, not the safe area. Specifically, it returns 0.0, 0.0, 896.0 and 414.0 for minX, minY, width and height respectively.

I've also tried to get the top, bottom, left and right properties of view.safeAreaInsets, but this returns 0 for each of them.

I've also tried to get the view.superview in case there was another view on top, but it returned nil.

All these values come from the iPhone 11. I'm using Xcode 12.

Upvotes: 1

Views: 2823

Answers (1)

matt
matt

Reputation: 535140

First, get the safe area insets. (Wait until they are known before you get them.) Okay, what are they inset from? The view controller's view. So simply apply those insets to the view controller's view's bounds and you have the rect of your rectangle (in view coordinates).

So, I believe this is the rectangle you were looking for?

enter image description here

How I did that:

override func viewDidLayoutSubviews() {
    super.viewDidLayoutSubviews()
    for v in self.view.subviews {
        v.removeFromSuperview()
    }
    let v = UIView()
    v.backgroundColor = .blue
    self.view.addSubview(v)
    // okay, ready? here we go ...
    let r = self.view.bounds.inset(by:self.view.safeAreaInsets) // *
    v.frame = r
}

Remember, that rect, r, is in view coordinates. If you need the rect in some other coordinate system, there are coordinate conversion methods you can call.

Upvotes: 5

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