从不兼容类型'void（^）（void）'getNewMessages = ^ {^ ~~分配'NSBlockOperation * __ strong'

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，而不是ObjectiveC的块。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"];
    }];