Question

我有一个适用于服务器的应用程序。我想创建一个离线模式，即当用户创建某些内容或更改它在某处保存时，然后当出现互联网连接时 - 这些请求将转到服务器。我怎样才能做到这一点？如何在NSUserDefaults中存储块？如何不丢失指向这些块的指针？它可以是不同的控制器。请帮帮我。我为我糟糕的英语道歉。我试图在NSUserDefaults

中保存这些对象

typedef void (^ExecutionBlock)(void);

@interface OfflineBlockObject : NSObject

@property (nonatomic, copy) ExecutionBlock block;
@property (nonatomic, strong) NSArray<NSMutableArray *> *operandsArray;
@property (nonatomic, strong) NSArray *conditionsArray;

@end

OfflineBlockObject *blockObject = [[OfflineBlockObject alloc] init];
        BOOL first = [self.reservation.reservationID boolValue];
        NSArray *conditions = @[@(first), @(self.shouldCallSetTagsForReservation)];
        NSArray *operands = @[@[[self.reservation json], self.reservation.reservationID ? : @0, self.selectedTags ? : @[]],
                              @[[self.reservation json], @(self.shouldForceApproved), self.selectedTags? : @[]]];
        blockObject.conditionsArray = [conditions copy];
        blockObject.operandsArray = [operands copy];
        @weakify(blockObject);
        blockObject.block = [^{
            @strongify(blockObject);
            if ([blockObject.conditionsArray[0] boolValue]) {
                ReservationsModel *m = [[ReservationsModel alloc] init];
                [m editReservation:blockObject.operandsArray[0][0] success:^(id responseObject) {
                    if ([blockObject.conditionsArray[1] boolValue]) {
                        [m setReservationTags:blockObject.operandsArray[0][1] tags:blockObject.operandsArray[0][2] success:nil failure:nil];
                    }
                } failure:nil];
            } else {
                self.reservation.eventId = self.reservationEvent.eventInfoID;

                ReservationsModel *m = [[ReservationsModel alloc] init];
                [m createReservation:blockObject.operandsArray[1][0] shouldForceApproved:[blockObject.operandsArray[1][1] boolValue] success:^(id responseObject) {
                    Reservation *reservation = [Reservation reservationWithJson:responseObject];
                    if (reservation.reservationID) {
                        if ([blockObject.conditionsArray[1] boolValue]) {
                            [m setReservationTags:reservation.reservationID tags:blockObject.operandsArray[0][2] success:nil failure:nil];
                        }
                    }
                } failure:nil];
            }
        } copy];
        [[OfflineQueueHelper sharedHelper] addTask:blockObject];

但是我的块属性变为null：（

Answer 1

所以我有一个可以做到这一点的吊舱，但它在Swift中（Obj-C让界面太复杂了） - https://cocoapods.org/pods/OfflineRequestManager。您可以创建符合OfflineRequest的任何对象，该对象将您想要的任何网络请求包装到服务器。如果要确保它通过应用程序终止持续存在，您还可以提供写入磁盘的字典。我们已经在我们的内部应用程序中使用它已经有一段时间了，所以希望其他人可以使用它。

最简单的用例看起来如下所示，尽管大多数实际情况（保存到磁盘，特定请求数据等）都会有更多的环节要跳过：

import OfflineRequestManager

class SimpleRequest: OfflineRequest {
    func perform(completion: @escaping (Error?) -> Void) {
        doMyNetworkRequest(withCompletion: { response, error in
            handleResponse(response)
            completion(error)
        })
    }
}
///////
OfflineRequestManager.defaultManager(queueRequest: SimpleRequest())

iOS：在离线版

1 个答案: