Uibutton expands the response area and click to highlight the halo effect

1. Set the highlighted halo effect of the button being clicked Code As follows:
[Cancelbutton Setshowstouchwhenhighlighted : Yes ];

2. Expand the touch response area with the button

the original code is as follows: menubtn. frame = cgrectmake (4, 8, 44, 28);
the code for expanding the touch area is as follows:
[menubtn setimage : [ pyutiles
imagefromfile : @" menubtn.png "]
forstate : uicontrolstatenormal ];
[menubtn setframe : cgrectmake ( 0 ,
0 , 48 ,
44 )];
[menubtn setcontentmode : uiviewcontentmodecenter ];
principle: Expand the frame rect of the button and set the image to center.
Note: If setimage and setbackgroundimage are used, will expand the image to the entire response area