UIImage *yuyinImage = [UIImage imageNamed:@"yuyin.png"];    [soundButton setImage:yuyinImage forState:UIControlStateNormal];    [soundButton setImage:yuyinImage forState:UIControlStateSelected];    [soundButton setImage:yuyinImage forState:UIControlStateHighlighted];    //top left bottom right    [soundButton setImageEdgeInsets:UIEdgeInsetsMake(5, 5, 5, 15)];NSString *soundButtonTitle = @"语音";    [soundButton setTitle:soundButtonTitle forState:UIControlStateNormal];    [soundButton setTitle:soundButtonTitle forState:UIControlStateSelected];    [soundButton setTitle:soundButtonTitle forState:UIControlStateHighlighted];    [soundButton setTitleEdgeInsets:UIEdgeInsetsMake(5, 10, 5, 0)];[myButton setTitleEdgeInsets:UIEdgeInsetsMake(0, 0, 0, 0)]; 4个参数是上边界，左边界，下边界，右边界。