在NSTimer中调用AFNetworking会导致严重的内存泄漏 [英] Calling AFNetworking in NSTimer causes serious memory leak

问题描述

我正在尝试调试内存泄漏难题.在MyAppDelegate.m中，我有

I'm trying to debug a difficult memory leak. In MyAppDelegate.m, I have

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    self.notificationTimer = [NSTimer scheduledTimerWithTimeInterval:1
                                                              target:self
                                                            selector:@selector(syncNotifications:)
                                                            userInfo:nil
                                                             repeats:YES];
    return YES;
}

- (void)syncNotifications:(NSTimer*)timer {
    NSString *path = @"http://example";
    NSLog(@"GET: %@", path);
    AFHTTPRequestOperationManager *network = [AFHTTPRequestOperationManager manager];
    [network GET:path parameters:nil success:^(AFHTTPRequestOperation *operation, id responseObject) {
        NSLog(@"get success");
    } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
        NSLog(@"Error: %@", error);
    }];
}

我看到内存泄漏的速度约为1MB/3秒.我尝试将网络设置为属性.还尝试注释掉实际的网络请求，如下所示:

I see memory leaking at the rate of ~1MB / 3 seconds. I've tried setting the network to a property. Also tried commenting out the actual network request as follows:

- (void)syncNotifications:(NSTimer*)timer {
    NSString *path = @"http://example";
    NSLog(@"GET: %@", path);
    AFHTTPRequestOperationManager *network = [AFHTTPRequestOperationManager manager];
}

虽然我看不到有太多的内存泄漏，但是我仍然看到仪器"面板中的内存分配正在增加.在涉及NSTimers的内存管理时，我是否缺少某些东西?

And while I don't see as much memory leaked, I do still see memory allocations climbing in the Instruments panel. Am I missing something when it comes to memory management for NSTimers?

推荐答案

经过大量测试，我发现问题"似乎与AFHTTPRequestOperation有关.切换到AFHTTPSessionManager时没有看到泄漏".

After a lot of testing, I found that the "problem" seemed to be with AFHTTPRequestOperation. I didn't see any "leaks" when switching to the AFHTTPSessionManager.

有关更多信息，请参见: https://github.com/AFNetworking/AFNetworking/issues/2596

For more information see: https://github.com/AFNetworking/AFNetworking/issues/2596

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