制作图像......怎么样?
问题描述:
有人可以告诉我当用户点击屏幕并使其显示在点击位置时如何显示图像。
提前致谢,
Tate
Could someone please tell me how to make an image appear when the user taps the screen and make it appear at the position of the tap. Thanks in advance, Tate
答
UIView
是 UIResponder
,它有以下可能有用的方法: -touchesBegan:withEvent:
, -touchesEnded:withEvent:
, -touchesCancelled:withEvent:
和 -touchesMoved: withEvent:
。
每个参数的第一个参数是 NSSet
of UITouch
对象。 UITouch
有 -locationInView:
实例方法应该产生的在您的视图中点击的位置。
The first parameter of each of those is an NSSet
of UITouch
objects. UITouch
has a -locationInView:
instance method which should yield the position of the tap in your view.