问题描述
对 performSelectorOnMainThread：的典型调用如下所示：
A typical call to performSelectorOnMainThread: looks like this:
[target performSelectorOnMainThread:action withObject:foo waitUntilDone:NO];
其中result是传递给action的参数。相应的操作是：
where "result" is an argument passed to "action". A corresponding action would be:
- (void)doSomethingWithThing1:(id *)thing1
调用具有> 1个参数的操作的正确语法是什么？如：
What is the correct syntax for calling an action that takes > 1 argument? Such as:
- (void)doSomethingWithThing1:(id *)thing1 andThing2(id *)thing2 andAlsoThing3(id *)thing3
[target performSelectorOnMainThread:action withObject:??? waitUntilDone:NO];
推荐答案
响应将非对象传递给中的方法performSelectorOnMainThread： ，我指出Dave Dribin的，它允许您执行如下操作：
In response to a similar question on passing non-objects to a method in performSelectorOnMainThread:, I pointed out Dave Dribin's category on NSObject, which lets you do something like the following:
[[person dd_invokeOnMainThread] doSomethingWithThing1:thing1 andThing2:thing2 andAlsoThing3:thing3];
在主线程上执行多参数方法。我认为这是一个非常优雅的解决方案。在幕后，他把事情包装在NSInvocation中，在主线程上调用它。
for performing your multi-argument method on the main thread. I think this is a pretty elegant solution. Behind the scenes, he wraps things in an NSInvocation, invoking that on the main thread.
琥珀框架也做类似的事情。
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