Swift 2迁移错误: "Type of expression is ambiguous without more context "

Question

运行 Swift 2 迁移后，我收到此错误:

Type of expression is ambiguous without more context

对于这一行:

 var interestItems = [String, NSNumber, Bool]()

Answer 1

在 Swift 1.2 中，编译器自动从 [String, NSNumber, Bool] 推断类型 [(String, NSNumber, Bool)] (元组数组)。

从 Swift 2 开始就不再这样了，迁移后你必须显式声明元组:

var interestItems = [(String, NSNumber, Bool)]()