objective-c - How to define a tappable area defined by coordinates

Question

I am writing a small iPad application that draws a shape from a list of coordinates. I would like to tap anywhere inside the shape and have some action occur (i.e. NSLog proving it worked).

Does anyone know how to create a tappable area that is defined by a list of coordinates?

The shape is being drawn on top of a MKMapView.

Answer 1

我的方法是：

让标记形状的点位于 UIView 的子类中。为该类覆盖 pointInside:withEvent:。然后看看如何确定二维点是否在多边形内？并使用您的新知识来实现​​ pointInside:withEvent:

- (BOOL)pointInside:(CGPoint)point withEvent:(UIEvent *)event 
{
    //Left as homework
}

您可以使用常规的点击手势识别器：)

Answer 2

只有 的 实例是UIView可点击的，它们的区域由它们的 rectangle 属性定义frame。原则上，可以（对于非常简单和特定的形状）用多个UIViews 来近似由坐标定义的区域，但这可能不是您想要的。