绑定iOS Framework导致临时文件损坏问题求助

Let me break down how to tackle these auto-generated file errors—they almost always trace back to small mismatches in your manual binding definitions. Here’s a step-by-step approach to debug and fix the issues:

1. Audit Your Delegate Signatures First (SupportDelegates.g.cs Hotspot) #

SupportDelegates.g.cs errors are almost always tied to misaligned delegate definitions. Here’s what to check:

• Match OC block signatures exactly: If your native framework has a block like void (^CompletionHandler)(NSError *error, NSData *result), your C# delegate must mirror this precisely: delegate void CompletionHandler([NullAllowed] NSError error, [NullAllowed] NSData result); Don’t skip [NullAllowed] for nullable OC types, and use Xamarin’s native aliases (e.g., nint for NSInteger, nfloat for CGFloat) instead of standard C# types.
• Verify referenced types exist: If a delegate uses a custom class/struct, make sure that type is properly defined in either StructsAndEnums.cs or ApiDefinitions.cs. Missing or incorrectly named types will throw "type not found" errors in the generated delegates.
• Check return value mappings: OC’s BOOL maps to C#’s bool, not int. Mixing these up will generate invalid delegate signatures that fail to compile.

2. Validate Structs and Enums Definitions #

Errors in StructsAndEnums.cs can silently break the code generator’s output:

• Match enum underlying types: If your OC enum uses NSUInteger, your C# enum must be marked as [Native] public enum MyEnum : nuint { ... }—using uint or the default int will cause type mismatches in generated code.
• Strict struct layout and field order: For OC structs like struct CGPoint { CGFloat x; CGFloat y; }, your C# struct needs [StructLayout(LayoutKind.Sequential)] and the exact same field order/types: public struct CGPoint { public nfloat x; public nfloat y; } Out-of-order fields or wrong types will corrupt trampoline logic.

3. Ensure Dependent Frameworks Are Properly Linked #

Since your main framework relies on two others, missing or misconfigured dependencies can cause odd generation errors:

• Check project references: If your dependencies are also Xamarin binding projects, add them as references to your main binding project. If they’re native frameworks, embed them in your project and update the LinkWith attribute in your main framework’s LinkWith.cs:

  [assembly: LinkWith("MainFramework.framework", 
                      LinkTarget.Simulator | LinkTarget.ArmV7 | LinkTarget.Arm64,
                      Frameworks = "DependencyFramework1 DependencyFramework2",
                      ForceLoad = true)]
  

• Confirm dependency visibility: Make sure dependent frameworks are included in both Debug and Release build configurations.

4. Hunt for Subtle Errors in ApiDefinitions.cs #

Even small mistakes here can derail the code generator:

• Check method export strings: Ensure the [Export] attribute’s selector matches the OC method exactly (e.g., [Export("fetchDataWithCompletion:")] for - (void)fetchDataWithCompletion:(void (^)(NSData *))completion;). Typos here lead to invalid trampoline methods.
• Mark nullable parameters: Use [NullAllowed] for any OC parameter that can be nil—omitting this can generate overloaded methods that clash or fail to compile.
• Skip problematic members temporarily: If you’re stuck, mark complex members (like generic blocks or obscure APIs) with [Internal] to exclude them from generation. This lets you isolate which specific binding is causing the error.

5. Clean and Regenerate to Clear Cached Junk #

Sometimes stale generated files cause false errors:

• Delete your binding project’s bin and obj folders manually, then close and reopen your IDE.
• If you used sharpie bind to generate initial definitions, re-run the command to refresh ApiDefinitions.cs and StructsAndEnums.cs—old generated code might have leftover cruft.
• Try building Release mode first. If Release works, check your Debug project settings: sometimes enabling "Full Debug Information" or other debug flags can trigger generation quirks.

6. Fix One Error at a Time #

With 30+ errors, it’s easy to get overwhelmed. Start with the most specific errors (e.g., "The type 'MyCustomDelegate' could not be found")—these point directly to a missing or misnamed definition. Fix those first, and many of the other errors will disappear as the generator starts producing valid code.

内容的提问来源于stack exchange，提问作者Miiite