Objective-C:如何使用 BOOL 类型参数调用 PerformSelector？

Question

有没有办法在选择器中发送BOOL？

[self performSelector:@selector(doSomething:) withObject:YES afterDelay:1.5];

或者我应该使用NSInitation？有人可以写一个示例吗？

Answer 1

如果您无法更改目标方法签名以接受 NSNumber 来代替 BOOL，您可以使用 NSInitation 代替performSelector的:

MyTargetClass* myTargetObject;
BOOL myBoolValue = YES; // or NO

NSMethodSignature* signature = [[myTargetObject class] instanceMethodSignatureForSelector: @selector( myMethodTakingBool: )];
NSInvocation* invocation = [NSInvocation invocationWithMethodSignature: signature];
[invocation setTarget: myTargetObject];
[invocation setSelector: @selector( myMethodTakingBool: ) ];
[invocation setArgument: &myBoolValue atIndex: 2];
[invocation invoke];