有没有办法在屏幕上找到触摸的区域/空间(例如,如果你将拇指放在屏幕上,它需要返回拇指覆盖的框架区域)？ 最佳答案 iOS 8.0中的新功能是UITouch的
majorRadius属性,它可以为您提供所需的数据：

Use the value in this property to determine the size of the touch that was reported by the hardware. This value is an approximation of the size and can vary by the amount specified in the majorRadiusTolerance property.