ios - 从不兼容类型 'NSBlockOperation *__strong' 分配给 'void (^)(void)' getNewMessages = ^{ ^ ~~

Question

__block HAAppDelegate *appDelegate = self;
getNewMessages = ^{
    if ([FBSession.activeSession isOpen]) {
        HANetworkRequest *request = [[HANetworkRequest alloc] initWithDelegate:appDelegate];
        [request doRequest:@"getNotifications"];
    }
};


assigning to 'NSBlockOperation *__strong' from incompatible type 'void (^)(void)'
    getNewMessages = ^{
                   ^ ~~

Answer 1

根据编译错误，getNewMessages 是一个NSBlockOperation 对象，不是ObjectiveC 的 block 。所以你应该按照以下方式使用它:

getNewMessages = [NSBlockOperation blockOperationWithBlock:^{
    if ([FBSession.activeSession isOpen]) {
        HANetworkRequest *request = [[HANetworkRequest alloc] initWithDelegate:appDelegate];
        [request doRequest:@"getNotifications"];
    }];