Rust Cocoa - How to Iterate NSArray

Question

From brandonhamilton/image-capture-core-rs's ICCameraDevice.mediaFiles() I can get the NSArray::count() (from core-foundation-rs) :

let cam_media_files = camera_device.mediaFiles();

println!(
  NSArray::count(cam_media_files)  // 123
);

But how can you iterate this Object?

I've tried a couple things:

// for media_file in NSArray::array(nil, cam_media_files) {
// for media_file in NSArray::arrayWithObject(nil, cam_media_files) {
for media_file in cam_media_files {
    println!("  🤩📷 media_file: {:?}", media_file);
}

All result in something like this:

error[E0277]: `*mut Object` is not an iterator
  --> src/image_capture_core_mod.rs:86:31
   |
86 |             for media_file in cam_media_files {
   |                               ^^^^^^^^^^^^^^^ `*mut Object` is not an iterator
   |
   = help: the trait `Iterator` is not implemented for `*mut Object`
   = note: required because of the requirements on the impl of `IntoIterator` for `*mut Object`
   = note: required by `into_iter`

Not much to work with here: https://docs.rs/cocoa/0.24.0/cocoa/foundation/trait.NSArray.html

What am I missing?

Thank you 🙇🏻‍♂️

Answer 1

According to the docs, NSArray has an objectAtIndex method, so this should work:

for idx in 0..NSArray::count (cam_media_files) {
   let media_file = NSArray::objectAtIndex (cam_media_files, idx);
   // ...
}

or if you want to do it with iterators:

for media_file in (0..NSArray::count (cam_media_files)).map (|idx| NSArray::objectAtIndex (cam_media_files, idx)) {
   // ...
}