“NSInvocationOperation”在Xcode6.1中不可用。-'NSInvocationOperation'isunavailableinXcode6.1

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As of Xcode 6.1, NSInvocation is disabled in Swift, therefore, NSInvocationOperation is disabled too. See this thread in Developer Forum

在Xcode 6.1中，nsinjob在Swift中被禁用，因此NSInvocationOperation也被禁用。请参见开发人员论坛中的这个线程。

Because it's not type-safe or ARC-safe. Even in Objective-C it's very very easy to shoot yourself in the foot trying to use it, especially under ARC. Use closures/blocks instead.

因为它不是类型安全的或安全的。即使是在Objective-C中，你也很容易用脚射击自己，特别是在弧线下。使用闭包/块。

You have to use NSBlockOperation in Swift.

您必须在Swift中使用NSBlockOperation。

or addOperationWithBlock to NSOperationQueue

或addOperationWithBlock NSOperationQueue

queue.addOperationWithBlock { [weak self] in
    self?.backgroundRun(self)
    return
}