objective-c - 无法为使用 typedef 的 block 编写正确的语法

Question

我有 Objective-C 代码，我尝试将其转换为 Swift 但失败了。

typedef void (^ CDVAddressBookWorkerBlock)(
    ABAddressBookRef         addressBook,
    CDVAddressBookAccessError* error
    );

@interface CDVAddressBookHelper : NSObject
{}

- (void)createAddressBook:(CDVAddressBookWorkerBlock)workerBlock;
@end

这是 Objective-C 实现:

 CDVAddressBookHelper* abHelper = [[CDVAddressBookHelper alloc] init];
 [abHelper createAddressBook: 
       ^(ABAddressBookRef addrBook, CDVAddressBookAccessError* errorCode) 
        {
         /* ...*/
        }
 ];

如何用 Swift 编写它？

来自文档:

{(parameters) -> (return type) in expression statements}

这是 xCode 提供的模板:

这是我尝试过的:

var abHelper:CDVAddressBookHelper = CDVAddressBookHelper()

abHelper.createAddressBook(
        {(addrBook:ABAddressBookRef, errCode:CDVAddressBookAccessError) in

           if  addrBook == nil  {

           }
        } )

错误:

 Type 'ABAddressBook!' does not conform to protocol 'AnyObject'`

[编辑]

问候:swift-closure-declaration-as-like-block-declaration帖子我尝试编写typealias:

typealias CDVAddressBookWorkerBlock = (addrBook:ABAddressBookRef, errCode:CDVAddressBookAccessError) -> ()

接下来怎么办？

如何让它发挥作用？

谢谢

Answer 1

查看 docs关于如何使用 Cocoa 和 Core Foundation。

这应该有效:

abHelper.createAddressBook() {
    (addrBook:ABAddressBook?, errCode:CDVAddressBookAccessError!) in                

            if addrBook == nil  {

            }


    }