SetAppThreadPriority:setpriority失败,错误45

Question

您好我的应用有问题:

 SetAppThreadPriority: setpriority failed with error 45

我正在使用Xcode 6,我不确定这是否是问题.

Answer 1

您没有为 NSOperation 设置线程优先级。下面是 Swift 中的一个示例，其中给出了您所看到的错误和没有看到的错误。我假设如果您使用 Objective-C，也会出现相同的错误消息

做

let backgroundOperation = BackGroundSillyness()
queue.addOperation(backgroundOperation)
backgroundOperation.completionBlock = {
    println("hello from completion")
}
println("hello from UI thread")

没有

   let backgroundOperation = BackGroundSillyness()
    queue.addOperation(backgroundOperation)
    backgroundOperation.threadPriority = 0
    backgroundOperation.completionBlock = {
        println("hello from completion")
    }
    println("hello from UI thread")