UIButton does not respond to cause analysis, uibutton Cause Analysis

UIButton does not respond to cause analysis, uibutton Cause Analysis

1. the response link of the parent view is blocked. For example, UIButton is added to the UILabel and UIImageView controls. Because UILabel (the value of userInteractionEnabled is NO) blocks the response link, UIButton cannot respond to the click event. you can modify the value of the UILable attribute userInteractionEnabled to YES to implement its subview UIButton to respond to the event.

2. The button range exceeds the parent view range;