Add hitTest method to the UIToolbar category to catch a touch event out of the toolbar frame. The touch event out of the frame is raised if the height of the center button image is larger than the toolbar height.
Add hitTest method to the UIToolbar category to catch a touch event out of the toolbar frame. The touch event out of the frame is raised if the height of the center button image is larger than the toolbar height.

el-eleven/EEToolbarCenterButton,yoichitgy/EEToolbarCenterButton