ios - 回调CFNetwork线程

Question

从 CFNetwork 线程中，我想对主队列进行一些处理，并异步获取结果。现在，我将结果分派(dispatch)到使用 dispatch_get_current_queue 获取的队列以获取结果。

dispatch_queue_t baseQueue = dispatch_get_current_queue();
dispatch_async(dispatch_get_main_queue(), ^{
    NSString* content = [self processSomething];
    dispatch_async(baseQueue, ^{
        [self sendResults:result];
    });
});

不幸的是，dispatch_get_current_queue 已被弃用。如何在不使用 dispatch_get_current_queue 的情况下实现同样的效果？

Answer 1

CFNetwork 是基于运行循环的。要实现您的要求，您可以使用 CFRunLoop API。像这样:

// ...from some code called by CFNetwork on its run loop
CFRunLoop cfNetworkRunLoop = CFRunLoopGetCurrent();
dispatch_async(dispatch_get_main_queue(), ^{

    // On the main thread...
    NSString* content = [self processSomething];

    CFRunLoopPerformBlock(cfNetworkRunLoop, kCFRunLoopCommonModes, ^{
        // Back on CFNetwork's run loop
        [self sendResults:result];
    });
    // Necessary for your block to run right away, otherwise it might 
    // be delayed (until something else wakes up the run loop.)
    CFRunLoopWakeUp(cfNetworkRunLoop);
});

希望对您有所帮助。