当用户触摸图像时如何显示图像，而当用户不再触摸图像时又如何隐藏图像？

Question

我正在创建一个应用程序，但我找不到有关如何仅在用户将鼠标悬停在文本框上时显示图像属性以及在用户不再触摸它时再次隐藏该图像属性的任何信息。

Answer 1

There are several ways of doing this. I'll give one possibility:

You can use a button and add 2 actions, one for

UIControlEventTouchDown

and one for

UIControlEventTouchUpInside | UIControlEventTouchUpOutside

in the first one you show the image and in the second one you hide the image