小编Akh*_*yal的帖子

我有点误解如何在swift中正确使用 - (void).每当我尝试使用 - (Void)编写代码但我收到错误" Expected declaration"或有时" Binary operator '-' cannot be applied to operands of type 'UIFont' and '(Void).Type'".

为什么会这样？在swift中正确使用此功能的正确方法是什么？

{

- (Void)keyboardWillShow { //>> showing me the error "Binary operator '-' cannot be applied to operands of type 'UIFont' and '(Void).Type'"
        // Animate the current view out of the way
        if (self.view.frame.origin.y >= 0)
        {
            [self setViewMovedUp:YES];
        }
        else if (self.view.frame.origin.y < 0)
        {
            [self setViewMovedUp:NO];
        }
    }

}

谢谢