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(, , , )];

NSString *soundButtonTitle = @"语音";

    [soundButton setTitle:soundButtonTitle forState:UIControlStateNormal];

    [soundButton setTitle:soundButtonTitle forState:UIControlStateSelected];

    [soundButton setTitle:soundButtonTitle forState:UIControlStateHighlighted];

    [soundButton setTitleEdgeInsets:UIEdgeInsetsMake(, , , )];

[myButton setTitleEdgeInsets:UIEdgeInsetsMake(, , , )]; 4个参数是上边界，左边界，下边界，右边界。