ios – 数组中的Swift闭包在Objective-c中变为nil

typedef void (^ScripTingEmptyBlock)();
typedef void (^ScripTingErrorBlock)(NSError *error);
- (void)scripTing_execute:(NSString *)operation withParams:(nullable NSArray *)args {

    SEL SELEctor = [self scripTing_SELEctorForOperation:operation];
    Class class = [self class];
    NSMethodSignature *signature = [class instanceMethodSignatureForSELEctor:SELEctor];
    NSInvocation *invocation = [NSInvocation invocationWithMethodSignature:signature];

    [invocation setSELEctor:SELEctor];
    [invocation setTarget:self];
    for (int idx = 0; idx < args.count; idx ++) {
        id arg = args[idx];
        [invocation setArgument:&arg aTindex:idx + 2];

    }

    ScripTingEmptyBlock success = args[1];

    // Breakpoint added on next line to test for nil
    success(); // this is nil and would crash!
    // (lldb) po args.count
    // 3

    // (lldb) po success
    // PrinTing description of success:
    // (ScripTingEmptyBlock) success = 0x0000000000000000

    // (lldb) po args[1]
    // (Function)

    //[invocation getArgument:&success aTindex:2]; // also tried this and got nil as well
    [invocation invoke];

}

该方法采用“操作”,通过在子类中重写scripTing_SELEctorForOperation来转换为选择器,然后执行调用.

所有这些都有效,除非被调用的方法具有块参数,它们都是nil,我添加了我用注释描述的nil的测试,当试图从数组中读取闭包时它将是nil.

叫做：

let successClosure: ScripTingEmptyBlock = {
                    print("Renamed product")
                }
let errorClosure: ScripTingErrorBlock = { error in
                    print("Failed to rename product: \(error)")
                }
let params:[Any] = [ "testName",successClosure,errorClosure]
object.scripTing_execute (ScriPTOPeration.updateProductName.rawValue,withParams: params)

封闭为什么变成零？