How to write blocks (closures) in swift3 right way?

Question

I am trying to find how I can write this blocks in swift3, any help would be appreciated.

I am using obj-c PocketSDK in swift3 project. https://github.com/Pocket/Pocket-ObjC-SDK

I can use this SDK fine with proper Bridge-Header settings, but still not sure how I can write blocks part.

obj-c

[[PocketAPI sharedAPI] callAPIMethod:@"get"
                       withHTTPMethod:PocketAPIHTTPMethodGET
                            arguments:arguments
                              handler:^(PocketAPI *api, NSString *apiMethod, NSDictionary *response, NSError *error) {
                              }];

This is the type def in PocketSDK.

-(void)callAPIMethod:(NSString *)apiMethod withHTTPMethod:(PocketAPIHTTPMethod)HTTPMethod arguments:(NSDictionary *)arguments delegate:(id<PocketAPIDelegate>)delegate;

     typedef void(^PocketAPIResponseHandler)(PocketAPI *api, NSString*apiMethod, NSDictionary *response, NSError *error);

swift? (This shows error.)

    let arguments: [String: Any] = [
        "state": "unread",
        "count": 20
    ]

    PocketAPI.shared().callMethod("get", with: PocketAPIHTTPMethodGET, arguments: arguments) {
        (api: PocketAPI,
        apiMethod: String,
        esponse: [AnyHashable:Any],
        error: Error) in
    }

@Updated

I could avoid the compile error without type def, but still get the unrecognized selector if I put arguments. If I set nil in arguments, I don't get it though. Anything wrong with the dictionary?

    var arguments = [String : Any]()
    arguments["count"] = 20
    arguments["state"] = "unread"

    PocketAPI.shared().callMethod("get", with: PocketAPIHTTPMethodGET, arguments: arguments) {
        (api,
        apiMethod,
        response,
        error) in
    }

Error.

-[_SwiftTypePreservingNSNumber length]: unrecognized selector sent to instance 0x174624540 2017-08-15 14:05:51.345611+0900 Voicepaper2[1062:286998] * Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[_SwiftTypePreservingNSNumber length]: unrecognized selector sent to instance 0x174624540' * First throw call stack:

I think in swift you dont have to declare type when call it, just need the variables name — Tj3n, Aug 15 '17 at 04:43
Thanks, it seems like arguments part (How to make Dictionary in swift) could be wrong. — Umeumeume, Aug 15 '17 at 05:02
I updated the question, it would be appreciated if you could take a look when you have time. — Umeumeume, Aug 15 '17 at 05:12
Have you tried using NSDictionary instead of [String: Any]? They're not the same thing. — Sid Mani, Aug 15 '17 at 05:17
The problem was "count": 20, but it should be "20". Thank you for your help! — Umeumeume, Aug 15 '17 at 05:18

score 0 · Answer 1 · answered Aug 15 '17 at 05:18

Solved! This was the final answer, thanks!

    let arguments: [String: Any] = [
        "state": "unread",
        "count": "20"
    ]

    PocketAPI.shared().callMethod("get", with: PocketAPIHTTPMethodGET, arguments: arguments) {
        (api,
        apiMethod,
        response,
        error) in
    }

How to write blocks (closures) in swift3 right way?

1 Answers1