Will的部落格

先將按鈕所需圖片複製進入專案並加入以下程式碼:

if( [[sender imageForState:UIControlStateNormal] isEqual:[UIImage imageNamed:@"button-on.png"]])
       {
           [sender setImage:[UIImage imageNamed:@"button-off.png"] forState:UIControlStateNormal];
           // other statements
       }
else
       {
           [sender setImage:[UIImage imageNamed:@"button-on.png"] forState:UIControlStateNormal];
           // other statements
       }