iOS 14 deprecates file export with the document picker view controller. The initialisers where you pass URLs have been deprecated, as has the UIDocumentPickerMode enum:
@available(iOS, introduced: 8.0, deprecated: 14.0)
public init(url: URL, in mode: UIDocumentPickerMode)
There is no indication in the documentation or the headers of what, if anything, is meant to replace this.
Did I miss a WWDC20 talk discussing these changes?
How are users meant to export files in iOS 14?
Post not yet marked as solved
Is it possible to use textures with GPU-driven indirect command buffers on Metal running on the A11 hardware?First, the Metal indirect command buffer API does not have a `set_texture` method, just `set_vertex_buffer` and `set_fragment_buffer`. However, with argument buffers, a texture can be placed inside a buffer, so in theory it should be possible to use textures in indirect command buffers. Whenever I try this though, the MTLCompiler crashes.Is this a bug, or is it an intended feature that textures can't be used in indirect command buffers? If so, that's a major limitation, and I'm a little surprised that it isn't called out anywhere that I can find in the documentation. On the other hand, Apple's only code sample of indirect command buffers doesn't use any textures, so I have my suspicions.Here's some sample code to demonstrate the MTLCompiler crash. If you uncomment the `set_fragment_buffer` line that sets the argument buffer containing textures, MTLCompiler crashes with "MTLCompiler: Compilation failed with XPC_ERROR_CONNECTION_INTERRUPTED"```struct ICBContainer { command_buffer commandBuffer [[ id(0) ]];};typedef struct TextureData { texture2d<half> albedo [[ id(1) ]];} TextureData;kernel void encodeDraw(uint nodeId [[ thread_position_in_grid ]], device VertexIn *vertices [[ buffer(BufferIndexVertices) ]], device uint *indices [[ buffer(BufferIndexIndices) ]], device ICBContainer *container [[ buffer( BufferIndexICBContainer ) ]], device TextureData *textureData [[ buffer(BufferIndexTextureData) ]], device InstanceData* instances [[ buffer( BufferIndexInstances ) ]], constant VoxelUniforms *uniforms [[ buffer(BufferIndexVoxelUniforms)]], //nb has to be passed by pointer in order to be encoded device ObjectParameters *parameters [[ buffer(BufferIndexObjectParameters) ]] ) { InstanceData instance = instances[nodeId]; float4x4 modelMatrix = instance.modelMatrix; // TODO frustum culling instances[nodeId].normalViewMatrix = rotationMatrix(uniforms->viewMatrix) * rotationMatrix(modelMatrix); instances[nodeId].shadowMVPTransformMatrix = clipToTexture * uniforms->shadowViewProjectionMatrix * modelMatrix; render_command cmd(container->commandBuffer, nodeId); cmd.set_vertex_buffer(instances, BufferIndexInstances); cmd.set_vertex_buffer(vertices, BufferIndexVertices); cmd.set_vertex_buffer(uniforms, BufferIndexVoxelUniforms); cmd.set_fragment_buffer(uniforms, BufferIndexVoxelUniforms);// cmd.set_fragment_buffer(textureData, BufferIndexTextureData); // uncomment this and compilation crashes cmd.draw_indexed_primitives(primitive_type::triangle, parameters[instance.meshId].indexCount, indices, 1, parameters[instance.meshId].baseVertex, nodeId);};```
Utsira.