如何快速使用阻止/关闭 [英] How to use block/closure in swift

问题描述

在我的一个应用程序中，我使用了block来进行Web服务调用并获得响应.现在，我想快速编写此应用程序，但是在Swift中使用块/关闭功能遇到了麻烦. 这是我想要快速迁移的目标C代码:

In one of my app I have used block for webservice calling and getting response. Now I want to write this app in swift, but I am getting trouble to use blocks/Closure in Swift. Here is my objective C code which I want to migrate in swift:

[[Communicator sharedInstance]callWebService:WS_LOGIN withMethod:POST_METHOD andParams:params showLoader:YES completionBlockSuccess:^(id obj) {
   //Do play with data
}completionBlockFailiure:^(id obj) {
   //Show alert with error
}];

在交流者班上

-(void)callWebService:(NSString *)serviceName withMethod:(NSString *)methodName andParams:(NSDictionary *)params showLoader:(BOOL)showLoader completionBlockSuccess:(void (^)(id))aBlock completionBlockFailiure:(void (^)(id))aFailBlock
{
   if (showLoader) {
   // show loader
   }
   [self performRequestWithServiceName:serviceName method:methodName andParams:params successblock:aBlock failureblock:aFailBlock];
}

- (void)performRequestWithServiceName:(NSString *)serviceName method:(NSString*)methodName andParams:(NSDictionary*)params
                 successblock:(void (^)(id obj))successBlock
                 failureblock:(void (^)(id obj))failBlock {
   if(callSuceess){
      successBlock(@"Success");
   }else{
      successBlock(nil);
   }
}

推荐答案

对于Swift.将AnyObject用作id objc类型.

For Swift. Use AnyObject for id objc type.

func callWebservice (serviceName: String, withMethod method: String, andParams params: NSDictionary, showLoader loader: Bool, completionBlockSuccess aBlock: ((AnyObject) -> Void), andFailureBlock failBlock: ((AnyObject) -> Void)) {
    if loader {
        // Show loader
    }

    performRequestWithServiceName(serviceName, method: method, andParams: params, success: aBlock, failure: failBlock)
}

func performRequestWithServiceName(serviceName: String, method methodName: String, andParams params: NSDictionary, success successBlock: ((AnyObject) -> Void), failure failureBlock: ((AnyObject) -> Void)) {
    if callSuceess {
        successBlock("Success")
    }else {
        successBlock(nil)
    }
}

更新:要调用web service的示例.参见下面的代码

UPDATE: An example when you want call web service. See code below

callWebservice("your-service-name", withMethod: "your-method", andParams: ["your-dic-key": "your dict value"], showLoader: true/*or false*/, completionBlockSuccess: { (success) -> Void in
    // your successful handle
}) { (failure) -> Void in
    // your failure handle
}

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