正常Parse函数上的主线程警告正在执行长时间运行的操作

问题描述

首先，我知道这意味着什么。问题是我在无法转换为后台调用的标准调用上遇到此错误。我在app开始时收到此错误：

First of all, I know what this means. The problem is that I'm getting this error on standard calls that can't be converted to background calls. I'm getting this error on app start at:

[Parse enableLocalDatastore];

PFInstallation * currentInstallation = [PFInstallation currentInstallation];

我发现通过在 warnParseOperationOnMainThread 上设置符号断点并检查调用堆栈，这些方法导致了问题。

I've found out that these methods are causing the trouble by setting a symbolic breakpoint on warnParseOperationOnMainThread and examining the call stack.

我不能用异步的那些替换这些调用，据我所知，这些方法 意味着要定期从主线程。这是一个Parse错误，还是应该从后台线程中调用所有这些方法？

I can't replace these calls with async ones, and as far as I know, these methods are meant to be called regularly from the main thread. Is this a Parse bug, or should I call all these methods from a background thread?

推荐答案

将呼叫包裹在...

dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
    PFInstallation *currentInstallation = [PFInstallation currentInstallation];

        dispatch_async(dispatch_get_main_queue(), ^(void){
            // any UI updates need to happen in here back on the main thread
        });
})

您将不会再看到警告。

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