抽取一个简单的按钮方法

//抽出一个按钮
- (UIButton *)buttonWithTitle:(NSString *)title action:(SEL)action{
    UIButton *button = [[UIButton alloc] init];
    [button setTitle:title forState:UIControlStateNormal];
    [button setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
    [button setTitleColor:[UIColor blueColor] forState:UIControlStateHighlighted];
    button.backgroundColor = [UIColor purpleColor];
    [button sizeToFit];
    [self.view addSubview:button];
   
    [button addTarget:self action:action forControlEvents:UIControlEventTouchUpInside];
    return button;
}