斯威夫特2：对于字典来说，表达式类型不明确，没有更多上下文

Question

Why is the compiler throwing an error for the following code that attempts to create a dictionary? How would you fix this code?

let options = [
  kCVPixelBufferCGImageCompatibilityKey: true,
  kCVPixelBufferCGBitmapContextCompatibilityKey: true]

I've looked through all of the other related questions with this same error and have not been able to find a solution.

Answer 1

How about

let options : [NSObject : AnyObject] = [
    kCVPixelBufferCGImageCompatibilityKey: true,
    kCVPixelBufferCGBitmapContextCompatibilityKey: true]

[NSObject : AnyObject] is the equivalent to NSDictionary in Objective-C. The library you're using requires it to be of this type.