CODEWITHSUNDEEP
ioscocoa-touchuiviewrotation
Hjalmar
Hjalmar

Reputation: 1941

Get the current angle/rotation/radian for a UIView?

How do you get the current angle/rotation/radian a UIView has?

Upvotes: 60

Views: 29658

Answers (7)

Hossein
Hossein

Reputation: 847

Using extensions:

extension UIView {
    
    var rotation: Float {
        let radians:Float = atan2f(Float(transform.b), Float(transform.a))
        return radians * Float(180 / M_PI)
    }
}

Usage:

let view = UIView()
print(view.rotation)

Upvotes: 0

Rohit Sisodia
Rohit Sisodia

Reputation: 895

//For Swift 3: M_PI is depreciated now Use Double.pi

let radians = atan2f(Float(yourView.transform.b), Float(yourView.transform.a));
let degrees = radians * Float(180 / Double.pi)

//For Swift 4:

let radians = atan2(yourView.transform.b, yourView.transform.a)
let degrees = radians * 180 / .pi

Upvotes: 6

Dan Loewenherz
Dan Loewenherz

Reputation: 11236

A lot of the other answers reference atan2f, but given that we're operating on CGFloats, we can just use atan2 and skip the unnecessary intermediate cast:

Swift 4:

let radians = atan2(yourView.transform.b, yourView.transform.a)
let degrees = radians * 180 / .pi

Upvotes: 8

Rakesh Yembaram
Rakesh Yembaram

Reputation: 433

For Swift 3, you could use the following code: 

let radians:Float = atan2f(Float(view.transform.b), Float(view.transform.a))
let degrees:Float = radians * Float(180 / M_PI)

Upvotes: 6

Sujay U N
Sujay U N

Reputation: 5340

In swift 2 and Xcode 7 :

let RdnVal = CGFloat(atan2f(Float(NamVyu.transform.b), Float(NamVyu.transform.a)))
let DgrVal = RdnVal * CGFloat(180 / M_PI)

Upvotes: 2

Peter Kreinz
Peter Kreinz

Reputation: 8628

Swift:

// Note the type reference as Swift is now string Strict

let radians:Double = atan2( Double(yourView.transform.b), Double(yourView.transform.a))
let degrees:CGFloat = radians * (CGFloat(180) / CGFloat(M_PI) )

Upvotes: 17

Krishnabhadra
Krishnabhadra

Reputation: 34275

You can do it this way...

CGFloat radians = atan2f(yourView.transform.b, yourView.transform.a); 
CGFloat degrees = radians * (180 / M_PI);

Upvotes: 116

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