restkit-0.20 - RESTKit 0.20 操作队列

Question

我正在尝试实现 RESTKit 0.20 操作队列，我在博客上读到 NSOperationQueue 也可用于创建操作队列。我想使用 RestKit 操作队列的 native 方法。

任何人都可以发布带有以下内容的代码/示例:

• 如何在 RestKit 中使用操作队列。
• 将队列设置为一次执行一个操作。
• 如果第一个操作未完成，那么我需要取消此队列中的待处理操作。

期待听到您的声音。

谢谢。

Answer 1

在这里，我将与您分享我用于 ManagedObjects(CoreData 对象)请求操作的一段代码。

获取对 objectManager 和 managedObjectContext 的引用；

RKObjectManager *objectManager = [(AppDelegate *)[[UIApplication sharedApplication] delegate] objectManager];
NSManagedObjectContext *managedObjectContext = [(AppDelegate *)[[UIApplication sharedApplication] delegate] managedObjectContext];

初始化数组以在其中保存操作

NSMutableArray *requestOperations = [NSMutableArray array];

准备第一个操作并将其添加到 requestOperations 数组，通知失败 block 正在取消队列中的待处理操作。

// Setup Organization Operation
//
NSString *url = @"organizations/syncAll/";
NSMutableURLRequest *organizationsRequest = [objectManager requestWithObject:organizations method:RKRequestMethodPOST path:url parameters:nil];

RKObjectRequestOperation *organizationsOperation = [objectManager managedObjectRequestOperationWithRequest:organizationsRequest managedObjectContext:managedObjectContext success: ^(RKObjectRequestOperation *operation, RKMappingResult *result) {

    ..

    [RKUtils isHandleStatusError:[result array]];
} failure: ^(RKObjectRequestOperation *operation, NSError *error) {
    NSLog(@"Failed with error: %@", [error localizedDescription]);

    [objectManager cancelAllObjectRequestOperationsWithMethod:RKRequestMethodPOST matchingPathPattern:@"games/getNotStartedGames"];
    [RKUtils handleError:error];
}];
[requestOperations addObject:organizationsOperation];

准备第二次手术

// Setup Games Operation
//
url = @"games/syncAll/";
NSMutableURLRequest *gamesRequest = [objectManager requestWithObject:games method:RKRequestMethodPOST path:url parameters:nil];

RKObjectRequestOperation *gamesOperation = [objectManager managedObjectRequestOperationWithRequest:gamesRequest managedObjectContext:managedObjectContext success: ^(RKObjectRequestOperation *operation, RKMappingResult *result) {

    ..

    [RKUtils isHandleStatusError:[result array]];
} failure: ^(RKObjectRequestOperation *operation, NSError *error) {
    NSLog(@"Failed with error: %@", [error localizedDescription]);

    if (error.code == NSURLErrorCancelled) {
        return;
    }

    [RKUtils handleError:error];
}];
[requestOperations addObject:gamesOperation];

准备更多操作

..

将最大并发操作数设置为 1

objectManager.operationQueue.maxConcurrentOperationCount = 1;

将所有操作放入队列中。队列将开始一个接一个地执行操作。

// Enqueue Request Operations
[objectManager enqueueBatchOfObjectRequestOperations:requestOperations progress: ^(NSUInteger numberOfFinishedOperations, NSUInteger totalNumberOfOperations) {
    NSLog(@"totalNumberOfOperations : %d", totalNumberOfOperations);
    NSLog(@"numberOfFinishedOperations : %d", numberOfFinishedOperations);
} completion: ^(NSArray *operations) {
    NSLog(@"completion");
}];

希望这能实现您的目的。干杯，