如何使用带有> 1个参数的选择器调用performSelectorOnMainThread:

Question

典型的调用performSelectorOnMainThread:看起来像这样:

[target performSelectorOnMainThread:action withObject:foo waitUntilDone:NO];

其中"result"是传递给"action"的参数.相应的行动将是:

- (void)doSomethingWithThing1:(id *)thing1

调用> 1参数的动作的正确语法是什么？如:

- (void)doSomethingWithThing1:(id *)thing1 andThing2(id *)thing2 andAlsoThing3(id *)thing3

[target performSelectorOnMainThread:action withObject:??? waitUntilDone:NO];

Answer 1

您可以将args放在字典或数组中并将其传递给特殊函数

- (void)doStuff:(NSString *)arg1 and:(NSString *)arg2 and:(NSString *)arg3 {
...
}

- (void)doStuff:(NSArray *)argArray {
    [self doStuff:[argArray objectAtIndex:0]
              and:[argArray objectAtIndex:1]
              and:[argArray objectAtIndex:2];
}

Answer 2

在回答关于将非对象传递给方法的类似问题时performSelectorOnMainThread:,我在NSObject上指出了Dave Dribin的类别,它允许您执行以下操作:

[[person dd_invokeOnMainThread] doSomethingWithThing1:thing1 andThing2:thing2 andAlsoThing3:thing3];

用于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,他将事物包装在NSInvocation中,在主线程上调用它.

该琥珀框架做一些与此类似,也是如此.