在RubyMotion中使用@selector

Question

如何将以下方法调用从ObjectiveC转换为RubyMotion语法:

[self.faceView addGestureRecognizer:[
    [UIPinchGestureRecognizer alloc] initWithTarget:self.faceView
    action:@selector(pinch:)]];

我到目前为止:

self.faceView.addGestureRecognizer(
  UIPinchGestureRecognizer.alloc.initWithTarget(
  self.faceView, action:???))

我理解@selector(pinch:)指示接收器对象pinch方法的委托,但我如何在RubyMotion中执行此操作？也许用块？

Answer 1

您应该只能使用字符串来指定选择器:

self.faceView.addGestureRecognizer(
  UIPinchGestureRecognizer.alloc.initWithTarget(
  self.faceView, action:'pinch'))