What do I do about this? I get no useful info predictably. A search for UnsafeMutablePointer yields func scrollViewWillEndDragging(_ scrollView: UIScrollView, withVelocity velocity: CGPoint, targ...

I got some unexpected behavior using UnsafeMutablePointer on an observed property in a struct I created (on Xcode 10.1, Swift 4.2). See the following playground code: struct NormalThing { var anI...

I am working with Accelerate library for my iOS app. I built this app in Swift 2.0 a couple years ago and it was working fine. Now that Swift is updated to 3.0 and 4.0, I have to convert most of th...

I'm using a C library in my Swift project, and one of functions requires a UnsafePointer<UnsafePointer<UInt8>?>! as an in-out argument where I should pass my data. But the problem is th...

Given an instance of UnsafeMutablePointer, what's the point of calling deinitialize(count:) right before deallocate(capacity:)? Can't you just call deallocate(capacity:)? I saw this when readin...

Objective-c has a concept of a pointer to a pointer. If you dereference the first pointer you can access the original void makeFive(int *n) { *n = 5; } int n = 0; makeFive(&n); // n is now 5...

I have a block that is passing data in that I'd like to convert to an array of array of floats -- e.g. [[0.1,0.2,0.3, 1.0], [0.3, 0.4, 0.5, 1.0], [0.5, 0.6, 0.7, 1.0]]. This data is passed to me in...

I'm trying to understand the use of pointers in Swift, in particular: Unsafe[Mutable]Pointer and UnsafeRaw[Mutable]Pointer. I have several questions on the subject. Is UnsafePointer <T> equ...

I have a little Problem with my Code after updating to Swift 3. I had this Code before the conversion: extension NSData { func castToCPointer<T>() -> T { let mem = UnsafeMutablePointer&...

Here was my workable code in the previous version of Swift: let imageOptionsDictKeys = [ kCVPixelBufferPixelFormatTypeKey, kCVPixelBufferWidthKey, kCVPixelBufferHeightKey, kCVPixelBufferOpenGLESC...

Within Swift 3, I need to send data to a C object accepting float ** input. In Swift 2, I used to declare a UnsafeMutablePointer< UnsafeMutablePointer<Float32>>, construct a swift Arr...

I'm attempting to call SecItemCopyMatching in my keychain utility class in order to get data out of the keychain, yet I'm running into a problem with getting the result argument, UnsafeMutablePoint...

I am doing some bitwise operations in Swift style, which these codes are originally written in Objective-C/C. I use UnsafeMutablePointer to state the beginning index of memory address and use Unsaf...