示例程式碼+註釋

    UIButton *button = [[UIButton alloc] initWithFrame:CGRectMake(0, 100, 200, 100)];
    
    //新增點選事件
    [button addTarget:self action:@selector(pushToSecond) forControlEvents:UIControlEventTouchUpInside];
    
    //整個按鈕的背景色（無背景圖片時有效果）
    button.backgroundColor = [UIColor greenColor];
    
    //新增背景圖片
    [button setBackgroundImage:[UIImage imageNamed:@"01.png"] forState:UIControlStateNormal];
    
    //按鈕標題
    [button setTitle:@"Hello World!" forState:UIControlStateNormal];
    
    //button上子控制元件的水平對齊方式
    button.contentHorizontalAlignment = UIControlContentHorizontalAlignmentLeft;
    
    //button上子控制元件的垂直對齊方式
    button.contentVerticalAlignment = UIControlContentVerticalAlignmentTop;
    
    //內容容器的偏移，讓文字向右偏移20畫素
    button.contentEdgeInsets = UIEdgeInsetsMake(0,20, 0, 0);
    
    //設定標題的背景顏色
    button.titleLabel.backgroundColor = [UIColor purpleColor];
    
    //標題顏色
    [button setTitleColor:[UIColor yellowColor]forState:UIControlStateNormal];
    
    button.imageView.contentMode = UIViewContentModeScaleAspectFit;
    
    [self.view addSubview:button];
    [button release];
 

執行效果